RE: Wanted: picture of Benol not mixing with glow fuel for R/C cars.
[quote]ORIGINAL: Nitrovein I have noticed that BeNOL can vary in color from batch to batch, sometimes orange-red sometime bright red. The orange color runs crisper. [:)] Most people I have talked to have recommended not to mix more gas/castor then what you use in a week. Gas supposedly breaks down the castor oil, but I don´t know if that has been tested in a controlled environment... [:)] [/quote] that sounds skeezy to me...... 2 different colors and one runs better then the other..............that does not sound like anything I want to be adding to my fuel...........
Posted on: 5/24/2013 3:42 AM by Author "supertib" in the forum "Car Nitro & Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11521116

RE: Wanted: picture of Benol not mixing with glow fuel for R/C cars.
before anyone gets mad at me ..... I am just joking around...... However I am curious as to why the OP is concerned about the Benol not mixing ? Are you planning to mix Benol into OD fuel ? or are you just curious to see if is indeed a repeatable result ?
Posted on: 5/22/2013 1:52 PM by Author "supertib" in the forum "Car Nitro & Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11519530

RE: Wanted: picture of Benol not mixing with glow fuel for R/C cars.
Low grade oil that wont mix with low grade fuel ! who cares LOL !
Posted on: 5/22/2013 9:13 AM by Author "supertib" in the forum "Car Nitro & Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11519288

RE: Wanted: picture of Benol not mixing with glow fuel for R/C cars.
[quote]ORIGINAL: 1QwkSport2.5r And the story, as I remember, is Benol will not mix with Odonnels. The purpose of this thread was to find the picture a member here on RCU posted showing the Benol not mixing with the fuel. [b]Thats all[/b]. If everyone read the first post of this thread, you would notice I wasn't asking the what why where when, etc. I was just asking for the picture, that is if the owner of that photo is willing to share it. This is not a discussion of why to add or why not to add this or that to fuel. I don't care what you folks do with your fuel. That's your deal. Edit: clarified threads purpose [/quote] Your the one being sarcastic about it in the first place
Posted on: 5/20/2013 8:06 AM by Author "supertib" in the forum "Car Nitro & Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11517071

RE: Wanted: picture of Benol not mixing with glow fuel for R/C cars.
[quote]ORIGINAL: 1QwkSport2.5r [quote]ORIGINAL: llkoolskillet Since your thread title suggests you have figured out the issue, how much benol would you add to a gallon of odonnels race fuel 30%? [/quote] Another member of the forum had asked about it and I remember the thread in the car section about it. I think that there might be some bad product getting around, OR it doesn't mix with methanol as well as they say. I've mixed SIG castor into several premixed fuels without issue. Sig castor is regular degummed castor. I wouldn't add any oil to 30% fuel. You wouldn't want to drop the nitro below 28% or your engine might now tune for crap... Okay, I was being sarcastic. I mix my own fuel, so I don't bother adding oil to premix. If I did, it wouldn't be Benol. [/quote] I would like to see a video of your stuff running ...just so we can what page of the story you are on......... adding contaminants to your fuel may be OK when running a TRX 2.5, but wont go to far when running a OS Speed......... I believe in buying a quality fuel to start, and I dont condone adding any contaminants to any fuel..... extra oil usually just causes engines to run hotter and lose throttle response.......
Posted on: 5/20/2013 4:46 AM by Author "supertib" in the forum "Car Nitro & Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11516872

RE: Nitro Guide and FAQs
[quote]ORIGINAL: SumoRcNoob Hey all, any approximate on how long a fully charged ''HSP'' glow plug igniter (1.2 volt 1800mah) will last ? [/quote] probably about 10 minutes of continuous use......
Posted on: 5/19/2013 10:52 AM by Author "supertib" in the forum "Car Nitro & Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11516118

RE: Truggy help please...?!
[quote]ORIGINAL: t-max97 [quote]ORIGINAL: supertib [quote]ORIGINAL: t-max97 [quote]ORIGINAL: supertib [quote]ORIGINAL: t-max97 [quote]ORIGINAL: Rusty22 Thanks guys, ill do some more research and i always have time to change and modify things of that nature [/quote] I don't know why he wrote that, Ive seen him recommend the same engine before. [/quote] As I say, manufactures will make running
Posted on: 5/18/2013 11:19 AM by Author "supertib" in the forum "RC Truggy"
http://www.rcuniverse.com/forum/fb.asp?m=11515223

RE: Truggy help please...?!
[quote]ORIGINAL: t-max97 [quote]ORIGINAL: supertib [quote]ORIGINAL: t-max97 [quote]ORIGINAL: Rusty22 Thanks guys, ill do some more research and i always have time to change and modify things of that nature [/quote] I don't know why he wrote that, Ive seen him recommend the same engine before. [/quote] As I say, manufactures will make running changes to their engine designs, some good
Posted on: 5/18/2013 9:03 AM by Author "supertib" in the forum "RC Truggy"
http://www.rcuniverse.com/forum/fb.asp?m=11515152

RE: Truggy help please...?!
[quote]ORIGINAL: t-max97 [quote]ORIGINAL: Rusty22 Thanks guys, ill do some more research and i always have time to change and modify things of that nature [/quote] I don't know why he wrote that, Ive seen him recommend the same engine before. [/quote] As I say, manufactures will make running changes to their engine designs, some good and some not so good.....so the 2010 version of a engine may be an absolute cherry, but the 20111 version can be not so cherry................... in 2011 they substantially changed the carbs of the Werks mills and it greatly affected the tuning characteristics of the engines.....in 2010 they were the top engine, but after the changed the carb the magic was no longer there...... The OS XZB may cost $40.00 more but it will be a much easier engine to tune and keep tuned, definitely worth the extra investment. OS carbs are as good as it gets and worth the extra cost IMHO..........Werks is a top notch company and I believe they are going back to the old carb design, I just don't know if it is in production yet............
Posted on: 5/18/2013 4:36 AM by Author "supertib" in the forum "RC Truggy"
http://www.rcuniverse.com/forum/fb.asp?m=11515009

RE: Truggy help please...?!
[quote]ORIGINAL: t-max97 [quote]ORIGINAL: supertib [quote]ORIGINAL: Rusty22 Thanks ill look into it! Someone else suggested an O.S. xz-b speed spec2? Do you or anyone else have an idea about these two motors? The HP rating are pretty close to the same but the os is almost $300 more than the B5.. [/quote] I wouldn't be taking engine advice from guys if they have no first hand experience
Posted on: 5/17/2013 3:35 AM by Author "supertib" in the forum "RC Truggy"
http://www.rcuniverse.com/forum/fb.asp?m=11513975

RE: Truggy help please...?!
[quote]ORIGINAL: Rusty22 Thanks ill look into it! Someone else suggested an O.S. xz-b speed spec2? Do you or anyone else have an idea about these two motors? The HP rating are pretty close to the same but the os is almost $300 more than the B5.. [/quote] I wouldn't be taking engine advice from guys if they have no first hand experience with the engines being suggested....it is very important to be sure the product being recommended has actually been successfully used by the person recommending it.........Also over time product lines make running changes, some good, some not so good............ Many products may seem very good in theory and end up not working nearly as well as expected........
Posted on: 5/16/2013 9:47 AM by Author "supertib" in the forum "RC Truggy"
http://www.rcuniverse.com/forum/fb.asp?m=11512982

RE: savage top speed?
[quote]ORIGINAL: llkoolskillet Well I have put up my numbers to compare to yours and my average rpm unload is 3,500 higher than yours regardless of the fact your motor may be able to reach 40k+. However you still want to continue arguing your point of a truggy motor in a savage. But hey when someone wants a modded motor who cares if it makes power lets just let it scream it's face off. Plain and simple you need torque to push the gearing and HP to carry you across the line. Technically your telling me I don't know how to gear my truck to 25k... Hmm ok I haven't even begun to play with traxxas gearing yet. My savage also reaches 50mph in the same distance as your 45k truggys. Takes ages huh to reach speed. Kinda funny when its still faster than my 6s flux geared for 75+ mph I think your right Neal both points have been argued and gotten no where. But if anyone wants pointers on how to go fast in a savage, just ask [/quote] you have no data on my average RPM.... LOL.... How can you even assume that ? you have no clue what my average RPM is LOL......We have no common testing to compare. Almost all nitro engines make peak power at 25K....very rarely does one make more power at higher RPM then it does at 25K...even high strung .21's......... you can see the dyno curves for yourself..... you act like I dont know what torque is...LOL....Of course I know what torque is...look at my dyno curves i posted if you want to see torque my friend..check the OS 28......it eats Picco's for breakfast...single speed truggies require more torque then a 2 speed MT does.... put that Picco in a truggy and see for yourself..... my truggy reaches 50 MPH in 180 ft.....I think it would go 0-50 MPH and back down to zero in less time than it takes your Savage to reach 50 and it will do it in half the distance.....Savage has zero chance running side by side with the truggy...... And yes the truggy eats the 6S flux alive in a drag race to 50 MPH........truggies accelerate much faster then a MT does.....not even fair or realistic to compare them......truggies are rockets.. in the end major props for you making 59 MPH..I really hope to see you go faster........ however please don't be blowing it out of proportion, you have not engineered the first manned lunar landing here or anything like that, so don't be letting your head swell too far over this one [:D]............. Once again Robin of course did a great job on your engine, but please don't be comparing it to any of mine.... Good or bad you have zero data to compare them one way or the other...
Posted on: 9/18/2012 5:38 AM by Author "supertib" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11232183

RE: savage top speed?
[youtube]http://video.google.com/videoplay?docid=-1678297284940363929[/youtube]
Posted on: 9/17/2012 2:28 PM by Author "supertib" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11231470

RE: savage top speed?
[quote]ORIGINAL: llkoolskillet Neal, one were talkin about a picco 28, and two you still have not explained why on earth you would mod a picco to rev way higher then it's combined average peak rpm of 25k. Plain and simple my motor does continue to make power above your average dyno number of 25k. The reason I can throw more and more gearing at it and still go faster and faster while maintaining MY average rpm of 28,500 is because i have more torque than a normally modded picco. Based off my calculations, if I was to hit 60 mph it would have been at an rpm of 27,500 with 20/43t gearing. I am not the one who modded my picco, Robin did and he is the only one on earth that knows what he did. All I have been doing is testing out theories that he and I come up with for reaching higher and higher speeds. We have uncovered quite a few amazing things I'm my quest for the fastest savage on earth. Your right not many are open to talk about a top speed savage. But there is actually quite a few that are actively trying right now and very interested in the subject. Where I am no one has really been, thus it's like paving the way to allow others to gain such speed. My goal in starting a thread that is now 20pgs long is to help others achieve insane speeds with there savage. The fastest flux right now uses a 3spd out of an XL, it's claimed top end is 79 mph. The average flux owner gets there flux to speed just above 50 mph without overheating issues and gearig the crap out of it and using belted street tires. Then it would be in the area I'm at. I used to run my mouth all the time saying my ERCM picco is faster than a flux on 6s. Well guess what... It is. I would absolutely love to see you attempt a run at 60 with a savage. If not have one of your CRE guys do it. The info is out there on how to do it. [/quote] I have explained why we push the RPM's...have explained it multiple times...have also explained why your theory doesn't convince me .....But I dont think you quite understand tho, so we will leave it be for now.......... I will bet right now your engine makes more poop at 25K then it does at 29K... and until you do more thorough testing you will never know one way or the other if I am right or if I am wrong.... your data is incomplete and realistically you are technically unable to even gear your truck to reach peak MPH at 25 K...................so until you have the available gearing needed it is a moot point.....you have reached your peak with the gearing you have available, end of story.. and for myself I have no interest in doing any internet speed war....unless there was some sort of regulations and proper timing equipment I have no interest at all......I could stick a Savage Body on my DM and rip 70 MPH this afternoon....without any clear definition of what a Savage is, there is no point in any shootouts or contests....Myself I ran a stock Savage XL on Terrapins, very much different then what you run As for shift RPM, we altered ours by changing out the shift spring..by using a stiffer spring we were able to reach a much higher 2-3rd shift RPM..... and when you say normally modded Picco, who's normal normal Picco ? you definitely shouldn't be referring to anything of mine as you simply cannot know one way or the other how what you run compares to one of mine.........no offense meant to anyone, but you have nothing at all to judge one of mine by, so don't make any blind assumptions nor include me or my work in your stories...
Posted on: 9/17/2012 2:09 PM by Author "supertib" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11231443

RE: savage top speed?
[quote]ORIGINAL: llkoolskillet I thought conversation toned down quite a bit Neal you say there is no way to make more torque than you already do, well let's just say there is. Look at what my torque motor has achieved. 59 or 60 mph in a savage with a motor designed to move 1/5 scale Baja wheels is pretty impressive. A high rpm motor without enough torque will not push the gearing I have with a .28. Just because a motor modded for higher rpm's like 35k+ does not mean it can push the gearing. Even if you get a super strong motor the tranny is the next hurdle. [/quote] Once again there is no reference set for me to judge your engine by............. You say you have huge amounts of torque, which you very well may, however you could just as easily have less then some of the other engines out there.......According to your logic your engine makes more torque and more high end power then anyone Else's does......... you stated earlier that your engine makes power higher in the RPM range then mine does, and now your saying you have more torque then mine does too............... Now considering that you have not really done much testing I find those statements somewhat hard to accept......You very well may be right, but you just as easily could be mistaken.........Until 2 engines are tested and compared back to back in the same conditions with no other variables it is impossible to make any judgements on the performance differences between them.......... Yes you have the fastest single engine Savage.......yes you have made the higher MPH at 29 000 RPM...but you have yet to test any taller gearing, and so far each time you have gone to taller gear the truck has gone faster......there is no evidence to support you have hit the peak and that gearing up further wouldn't produce even more speed.................. Now you also are making assumptions about other engines based off other people's results in doing top speed runs...Unfortunately that logic takes into account none of the variables involved...variables that can dramatically affect the outcome....... We are all running different trucks, in different conditions, using different fuels, different tuned pipes.......Add int he fact that you are the only one who has made any real effort at a top speed Savage.........Its pretty easy to win a game of hockey if the other Team isn't even playing to win........ No offense meant but none of us really put much effort into making a Savage a top Speed machine.......... We stuck a mod 28 in a bone stock Savage XL and did some radar passes..... I think we made about 12 passes in total and melted out 3 trannies.....At the time the gearbox just overheated and the gears melted out....... probably didn't do the top speed any justice either........... Now you also made the assumption my engines dont make power past 25K.... which is simply incorrect........... my engines all make power well past 25K, some of them actually make useable power to 45K............What I was trying to tell you is that most nitro engines seem to make their highest HP number in the 25 000 RPM range.... some are able to make near peak power well past 25K,but as a trend most of these engines make their highest HP figure right around 25K..... even high strung .21's that rev out to 45K still make peak at 25K...And for top speed runs your likely best to hit your peak MPH right at your engines HP peak....this is where in the RPM range the engine can do the most amount of work....pulling top speed gearing is hard work and to give your engine the most mechanical advantage you want to run at the engines peak....................... talking about torque...a single speed, 9.5 lb truggy needs a engine with plenty of torque.... without a 2 speed the engine needs to be able to lug the weight of the machine off the bottom with a much taller gearing then the MT has to use...... Its amazing but often times a engine that feels crazy fast in a MT will feel soft and lazy in a Truggy...... Truggies eat up the power like nothing else...... So in the end major props to you for hitting 59 MPH.... I think its fantastic and hope to see you go faster..............Y
Posted on: 9/17/2012 7:49 AM by Author "supertib" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11231048

RE: savage top speed?
[quote]ORIGINAL: savagecommander 42000 rpm under load? That's a bold statement...maybe geared waaaaay down. [/quote] its fact......we pull those RPM's every time we go down the straight.......... the gearing on the machines is stock for the most part.....with a Buggy /truggy you dont really have any viable ways to gear then lower usually.....Plus with a single speed gearing them lower will result in a loss of top speed...............
Posted on: 9/17/2012 6:36 AM by Author "supertib" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11230960

RE: savage top speed?
this video here will give you a better birds eye veiw of whats involved in the track, and why we need such strong low end pop............ [youtube]http://www.youtube.com/watch?v=HLiiejIA0FQ[/youtube] needless to say, high RPM engines are my specialty.......Of course not every engine is capable of surviving at these RPM's.....however many of the better built engines have no issue being run like this............
Posted on: 9/17/2012 6:30 AM by Author "supertib" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11230954

RE: savage top speed?
[quote]ORIGINAL: llkoolskillet Your right Foxy Neal a dyno only shows one part of the story and you know this. Yet they are impressive gains, it still does not make sense why you would push an engine almost 20k higher when they don't need it. I would think if you added a little more torque to your mods you could achieve the same top end without the insane motor poppin rpm. [/quote] How could I achieve the same top end ? I guess we could gear up a couple of teeth...However as I explained earlier that doesn't really work well in a Truggy/Buggy as you lose the snap needed for the jumps as well the clutch systems start to melt.............Gotta remember these are single speed machines that run on a race track, with plenty of jumps and short run obstacles...so having killer bottom end is mandatory.......Gearing up just kills the feel of the machine, and as I say it tends to melt the clutches........On a 28 we usually gear up 1-2 teeth, on a 25 we gear up 1 tooth and on a .21 we run stock gearing...... Also there is no way to modify for more torque, unless of course you are willing to sacrifice top end.........even then I am not sure you can make more torque then I already do on my engines.....I mean we use a .21 to push a single speed 9.5 lb truggy...that can run 0-50 MPH back to zero faster and in half the distance a MT can reach 50........ the engine needs to have a pile of torque to be able to accelerate a truggy like that......without the leverage of a 2 speed gearbox the engines are required to pull a substantial load at low RPM anyways here is a Losi 2.0 truggy, stock gearing, CRE Bonito running on our ultra high bite track...this track surface has more grip then asphalt ...So the engine needs to have grunt to pull the truck....But this should give you an idea of why we dont gear up...Also in this video the engine is hitting 43 000 RPM ............Also the engine is well built and has no issue holding together running these RPM's...Novarossi are very solid engines......... [youtube]http://www.youtube.com/watch?v=VrJ-mI1a2bs[/youtube]
Posted on: 9/17/2012 6:25 AM by Author "supertib" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11230947

RE: savage top speed?
[IMG]http://i107.photobucket.com/albums/m307/stitchdoctor/Clockwork%20Dyno%20tests/Picco28vsOS28.jpg[/IMG]
Posted on: 9/16/2012 8:24 PM by Author "supertib" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11230596

RE: savage top speed?
[IMG]http://i107.photobucket.com/albums/m307/stitchdoctor/Clockwork%20Dyno%20tests/Picco28modifiedvsOS25modified.jpg[/IMG] [IMG]http://i107.photobucket.com/albums/m307/stitchdoctor/Clockwork%20Dyno%20tests/Picco28ModvsstockvsB5.jpg[/IMG]
Posted on: 9/16/2012 8:22 PM by Author "supertib" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11230595

RE: savage top speed?
here is a bone stock Picco 28 with 0.1 mm head shim removed, OFNA 086 vs a modified B5 race .21..... [IMG]http://i107.photobucket.com/albums/m307/stitchdoctor/Clockwork%20Dyno%20tests/Picco28FTTshimremovedvsModB5.jpg[/IMG]
Posted on: 9/16/2012 8:17 PM by Author "supertib" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11230588

RE: savage top speed?
[quote]ORIGINAL: llkoolskillet If your so wise, then why do you huff and puff first, then decide to sit down and write out an educated response? The tallest gearing I run is 20/43t with 26/9t diffs, 146mm tires. This gearing, set for 62mph, yields an rpm of 28,400. I have an RS4 MOD1 22t CB and that geared for 62mph yields an rpm of 25,500 but I have to mod the CB to fit on the savage chassis, so I may not use it. However based off my experiance with high speed runs has shown me that its not all about gearing. The motor, one has to have torque to push the gearing, and two it needs to have a lot of power to reach those speeds. So my new motor will have a few changes from this last one. The crazy part is that my last motor was a torque motor not a high speed motor but yet it could have passed 60mph. My new goal is 65mph and I will reach it. Something else that has come to light is the stock 3spd tranny cannot pass 55mph without clutch pawl modifications. It simply cannot allow the motor to rev high enough into the power band to optimize the shift point. Your right the pipe and header have to be set up correctly for high speed runs. As you are already aware of the ERCM pipe is no joke and DOES make power. However for the lower rpm you speak of you need a longer header and for the taller rpm you need a shorter header. I have both to play with. But my 59mph run I used the shorter header. Oh and everytime I upped the gearing on my setup, the truck went faster and faster. With 18/44 and 143mm tires and 29/9 diffs Ive gone 55mph, with 18/43t, 146mm and 29/9 ive gone 55mph, with 18/43t, 146mm tires, and 26/9 diffs ive gone 58mph, with 19/43t, 146mm tires and 26/9t diffs i went 59mph. So as you can see the more gearing the faster I can go. If the motor had 1 less gallon on it and with the 20t cb 43t spur, 146mm tires and 26/9t diffs I would have broke 60mph. All of this is well within the 28,500-29,600rpm range using the ERCM endbleed and shortened dynamite header. Im still confused how can achieve 40,000+ rpm under load with the picco, but yet your dyno shows the best power under 25k. So then why do you mod your piccos to rev so high when they dont need to. All that does it raise the risk of popping the motor. [/quote] a Truggy does not have a 2 speed.....the engine has to push a 10 lb truck from 0-50 MPH with only a single speed... So overall the best performance comes from a engine that has the ability to spool into he extreme high RPM's........... You can try to gear up a lower revving torque engine, but it usually results in a melted clutch and less than stellar performance.... My dyno shows most engines make their best peak at 25K.But of course there are exceptions............usually high strung 7 and 9 port .21's will make big peaks near 30K......but offroad mills usually shine at 25K( give or take within reason of course ) . in a truggy the area under the curve is more critical then where and how high the engine makes peak power, usually I tune my engines to have the ability to carry useable power well past the engines peak.... anyways here is a dyno of a high strung, short stroke .21..before and after modifications....should better explain what I mean by useable power after peak.... [IMG]http://i107.photobucket.com/albums/m307/stitchdoctor/Clockwork%20Dyno%20tests/2011SluggedB52013vsstock.jpg[/IMG]
Posted on: 9/16/2012 8:07 PM by Author "supertib" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11230582

RE: savage top speed?
[quote]ORIGINAL: llkoolskillet Haha here we go... First off your comparing a picco in a truggy to a picco in a much heavier savage. Wow, yes we all know that Dropping weight allows you to reach higher in the rpm band. So I'm not shocked that your picco is revving higher. Also 42,000 rpm under load. No my friend I don't believe that. This coming from a guy that will tell you all day long that the Piccos max power or useable power is in the 20-25,000rpm range. So why on earth would you build a motor that can rev so far past it's peak power? My savage XL weights 12lbs that stock weight or heavier and it ran 56.8mph. So no your XL isn't faster. There's guy here running a stock LRP 30 in an old savage 25 hittin 51mph and the truck is gone stock. So your 52mph attempt woohoo. As for making my claim, yes I showed you the facts that my picco made more power past your claim of 25,000. Mine consistently runs 29,000rpm and I have no lag on the bottom. Let's also not forget that I did all my speed runs with a Huge gouge in the piston and sleeve. So there alone proves even hurt it makes more peak power and at a higher rpm than your do. Your right your both top notch modders, but when you sit here and tell me to gear my truck to 25,000rpm for it best power chance, your wrong! Oh and my purpose built savage is nothing more than stock hpi parts with the exception on the cen ring and pinion. Everything is stock. Show me a savage running 65mph cause I sure as hell am not sending mine to you. Build your own and prove me wrong! [/quote] Do the math on a Mugen MBX5T.... 14th CB, stock geared everywhere else..on GRP LPR race tires.........to reach 50 MPH the engine is pulling well past 40 000 RPM........the car is only geared up 1 tooth over stock......... My race engines all pull 40K under load in race conditions...... Some reaching as high as 44 000 RPM ..........Stock gearing or geared up 1 tooth..... I use a radar gun as well as a acoustic Tachometer........ I think you have misunderstood me ....... The Geometry of the Picco 28 somewhat dictates that its more efficient at lower RPM's long stroke, short rod, heavy piston......On the dyno the engine shows that it makes its best numbers when it peaks at the 25 000 RPM range....... Of course we can easily push the peak higher playing with timing and piping and whatnot , but then we start to lose area under the curve as well as a reduced peak output....Onroad .21's peak at 29-30K and are efficient when doing so, a Picco 28 can peak high, but it loses efficiency in doing so..........anyways these are my observations based off several thousand hours of hands on dyno testing nitro engines ... playing with tuned pipes,port timing and engine geometry...... In the end I am experienced and wise enough to know nothing is set in stone and I make no assumptions one way or the other without thorough testing ......There are just too many variables involved to make any absolute judgements......So far you have offered me no proof your engine makes more power at 29K then it would at 25K... the only way to prove the engine makes less at 25K is to gear the truck to reach 60 MPH at 25K and see if the truck can pull it.... if it cant pull 60 MPH at 25K we know the engine does not make enough HP to sustain 60 MPH...However if the truck pushes past 60 MPH at 25 gearing, we then know the engine has power in excess at 25K and it can push even higher gearing....................... However with that being said I do not doubt nor do I believe your engine makes peak at 29K... I do not believe you have enough testing done to know one way or the other...myself I hold no opinion of the fact one way or the other. I only question your strong conclusions based off what I see as incomplete testing......unless of course you have run a much taller gearing then I realize.... heck I don't even know if you can gear the truck to be at 60 MPH at 25K engine RPM......can you ? HP and RPM ..... I ask you this...have you tested a gear ration that will give you 62 MPH at 25 000 RPM ? If not, could you tell me what gearing you would need ? And then tell me what the tallest gearing you tried is ? and what was the result of the taller gearing ?
Posted on: 9/16/2012 3:46 PM by Author "supertib" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11230312

RE: savage top speed?
[quote]ORIGINAL: llkoolskillet Haha here we go... First off your comparing a picco in a truggy to a picco in a much heavier savage. Wow, yes we all know that Dropping weight allows you to reach higher in the rpm band. So I'm not shocked that your picco is revving higher. Also 42,000 rpm under load. No my friend I don't believe that. This coming from a guy that will tell you all day long that the Piccos max power or useable power is in the 20-25,000rpm range. So why on earth would you build a motor that can rev so far past it's peak power? My savage XL weights 12lbs that stock weight or heavier and it ran 56.8mph. So no your XL isn't faster. There's guy here running a stock LRP 30 in an old savage 25 hittin 51mph and the truck is gone stock. So your 52mph attempt woohoo. As for making my claim, yes I showed you the facts that my picco made more power past your claim of 25,000. Mine consistently runs 29,000rpm and I have no lag on the bottom. Let's also not forget that I did all my speed runs with a Huge gouge in the piston and sleeve. So there alone proves even hurt it makes more peak power and at a higher rpm than your do. Your right your both top notch modders, but when you sit here and tell me to gear my truck to 25,000rpm for it best power chance, your wrong! Oh and my purpose built savage is nothing more than stock hpi parts with the exception on the cen ring and pinion. Everything is stock. Show me a savage running 65mph cause I sure as hell am not sending mine to you. Build your own and prove me wrong! [/quote] Do the math on a Mugen MBX5T.... 14th CB, stock geared everywhere else..on GRP LPR race tires.........to reach 50 MPH the engine is pulling well past 40 000 RPM........the car is only geared up 1 tooth over stock......... My race engines all pull 40K under load in race conditions...... Some reaching as high as 44 000 RPM ..........Stock gearing or geared up 1 tooth..... I use a radar gun as well as a acoustic Tachometer........ I think you have misunderstood me ....... The Geometry of the Picco 28 somewhat dictates that its more efficient at lower RPM's long stroke, short rod, heavy piston......On the dyno the engine shows that it makes its best numbers when it peaks at the 25 000 RPM range....... Of course we can easily push the peak higher playing with timing and piping , but then we start to lose area under the curve as well as a tendency to reduce mean overall output.......But of course these are only my observations based off several thousand hands on hours dyno testing these engines ... playing with tuned pipes,port timing and engine geometry...... I am experienced and wise enough to know nothing is set in stone and I make no assumptions one way or the other without thorough testing ......There are just too many variables involved to make any absolute judgements......... HP and RPM ..... I ask you this...have you tested a gear ration that will give you 62 MPH at 25 000 RPM ? If not, could you tell me what gearing you would need ? And then tell me what the tallest gearing you tried is ? and what was the result of the taller gearing ?
Posted on: 9/16/2012 3:43 PM by Author "supertib" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11230309

RE: savage top speed?
I just have to add here...that Robin at ERCM is my friend.... we both do great work........and I make no assumptions that my engines are faster or better then his engines.......And I am sure Robin feels the same way ......... When it comes to making RC cars go fast there are just too many variables involved to assume anything, and the more time you dedicate to a goal, the better the results you will have.....anyways major props to you guys for making a Savage run 60 MPH...I do not want to take anything away from that by turning this into a modder vs modder type discussion.....As I beleive we are both pretty skilled at tuning these engines, and we tend to focus on different characteristics for our engines......... I mainly specialize in Truggy/Buggy engines..Robin does more in the MT engine side of things...tho we both are more then capable of doing the other, the bulk of our R+D is focused into our specific specialties..., As I say the more time we spend testing, the more advanced we become in our specified craft respectively........... I mainly develop engines that run in a single speed track machines,s......My engines generally operate from 9000 RPM to 42 000 RPM under load...without a 2 speed gearbox the race machines require a engine with are under the curve more so then high peak HP......
Posted on: 9/16/2012 6:48 AM by Author "supertib" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11229904

RE: savage top speed?
My Picco makes plenty of top end power...on video mine revs much higher then yours does...I just dont bother with the Savage as all I did was tear the drive train out every time I ran them........ here is a 42 000 RPM Picco 28 carrying a 200 ft wheely with a center diff'd truggy...Now that is some serious HP and RPM to do that.........I do not hear your Picco 298 hitting anywhere near that RPM.....so don't be saying yours makes more top end power when it clearly doesn't even rev nearly as high as mine does.... [youtube]http://www.youtube.com/watch?v=svbaqFOW_5Q[/youtube] [youtube] http://www.youtube.com/watch?v=0Yys0sU6c80&feature=relmfu[youtube] in the end I stopped running Savages 4 years ago because the drive trains couldn't handle the power of the Picco 28's.......I did try doing some top speed testing for one day, we were using a bone stock Savae XL, on Terrapin tires, body on...we hit 52 MPH and in one day melted 3 different 3 speed trannies.....we couldn't get one single clean run without the tranny failing, so we gave up as the juice was not worth the squeeze...nobody cares about a top speed Savage, So I was not going to waste any time on it............At the time Robin was experiencing the same things with tranny failures, at the time the drivetrains were junk and there were no bullet proof parts available to us....SO it was pretty tough to pursue any sort of top speed numbers when the gears themselves would melt........ In the end unless 2 engines are run in 100% identical setups there is no way to know which one makes more power..........its obvious my engine revs much higher then yours does...but mine is in a truggy.....just like your Savage has a much faster top end then mine did, but your truck and my truck are nothing alike..I am a stock, plus weight Savage XL on Terrapins........You have a short chassis, highly modified purpose built top speed truck on road tires............. comparing your Savage to mine is no different then me comparing my truggy to your Savage...All 3 are totally different machines.............Far as I know I still have the fastest Savage XL on Terrapin tires and stock drivetrain !!!! So before you start making assumptions on who's engine is faster you should put things into proper perspective.........Robin and myself both do top notch work..... However you have no viable evidence that your Picco makes better top end power then mine does.... Going by video my engine clearly revs much higher then yours does...but we are in different vehicles, which meas comparing results and videos is meaningless....and this goes both ways..me comparing my engine to yours, and you comparing to mine............ Want a proper fair trial ? put your Picco 28 into a stock Savage XL, run Terrapin tires , stock gearing, stock drivetrain, use a Dynamite 086, OD 30% race ( not even the fancy Speed blend ) and see if you can break 52 MPH....Or send me your Savage, I will stick in a mod Nova 28 and I will show you 65 MPH ! [:D]
Posted on: 9/16/2012 5:54 AM by Author "supertib" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11229862

RE: what is normal nitro engine life?
you may have gotten dirt in the engine......i work on hundreds of engines and see dirt in a very high number of them...dirt can come in thru the airfilter, as well it can come in thru the front bearing..................If a engine starts stalling and acting up you need to pull the engine down and find the issue..if its dirt it just may need to be cleaned out...................... However if there is something going wrong inside, all your doing by continuing to run is further the damage that is done.................When it comes to these small engines assume nothing, if it starts acting up then you need to find the issue, continuing to run it just does more damage........
Posted on: 9/16/2012 4:47 AM by Author "supertib" in the forum "RC Car General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11229823

RE: Need all buggies!
If you want a trick BL buggy look at the Serpent 811E .....its absolutely wicked...........very fast car that is extremely durable and well made.............
Posted on: 9/13/2012 5:36 AM by Author "supertib" in the forum "RC Car General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11227075

RE: Best engine
[quote]ORIGINAL: ace@ Hey Guys quick question. I have the RB TM728 is the Picco 28 better? not modded or anyting. [/quote] well the RB is the netter built engine, but the Picco is more powerful...the RB also has a better carb...but as I say, it also has less poer then the Picco...the 728 does tune easy tho and is very stable when broken in
Posted on: 9/12/2012 5:53 AM by Author "supertib" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11225973

RE: Racers v. Bashers (the vehicles not the drivers)
[quote]ORIGINAL: The_Shark the illure with MT's for me is thier topheavy, cumbersome handling and too much torque, to me, if I'm bashing and I don't have to flip the car over a few times i'm bored. MT's do have their place, but they are not the most durable. [/quote] all machines rightly have their place........[;)] unfortunately I flip my truggy over plenty of times [:(]........ however usually if she goes over its usually at full speed over something I have no business going over LOL .........So when you crash, you usually crash big.........[:D] I have driven some impressive Savages too.....had plenty of fun with them...most were fully customized hopped up trucks...with lowered , extended chassis, upgraded shocks..All the bells and whistles including modified 28 engine........The last one was a replica of Savage Sam's truck with a mod Nova 28-7...was an absolute rocket and even entertaining to run on a bare grass field......doing 25MPH it will pull itself over backwards if you hit the slightest lift on the ground..just a tiny bump and the front was up and over.........The truck was blast to drive, and definitely had a wow factor to it ......
Posted on: 9/11/2012 8:06 AM by Author "supertib" in the forum "RC Car General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11224997