RE: what is normal nitro engine life?
[quote]ORIGINAL: Ttowntoolman Herrsavage, I agree, nothing wrong with SH engines. I also agree they like a richer tune than say an OS. I would like to ask you though, how do you check to see if an engine is used up or still good without tearing it down, short of a compression test? I simply roll the flywheel around with the glow plug in to see if there is a mechanical pinch left, or at minumum
Posted on: 9/18/2012 2:48 PM by Author "HerrSavage" in the forum "RC Car General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11232748

RE: what is normal nitro engine life?
My SH engines live eight+ gallons easily.. Ultimately, who cares how it feels when rotating the flywheel when it's not running?.. It's how it runs that counts.. No doubt the more expensive - and touchy - "race engines" are better for racing.. But that does not mean that SH- engines (LRP, Dynamite, Losi, Nosram, SH, etc..) engines suck.. - not at all. Furthermore, engine for engine, if anything the lower-pinch SH engines might live longer than some high-pinch race engine. The pinch is what makes conrods give out, right? Leading to damaged, if not dead engines...
Posted on: 9/18/2012 10:48 AM by Author "HerrSavage" in the forum "RC Car General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11232524

RE: savage top speed?
[8|][8|]
Posted on: 9/18/2012 5:15 AM by Author "HerrSavage" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11232165

RE: what is normal nitro engine life?
[quote]ORIGINAL: mattsauto  is there a secret to longevity on a nitro engine like keeping it on the rich side or a different breakin? my lrp ran awesome  for like 4 gallons ( i did run it very hard on big track). is it the brand of motor, fuel i use (s&w 20%) or maybe my tune? i kept my race tune the whole time after breakin without having to change it (weather stayed the same) & it never got over 260 in temp & ran awesome. i am still new to rc (about 9 months) but have been working on full scale vehicles, snowmobiles & dirt bikes all my life so i got a pretty good sense of tuning but still learning. thanks for help it is very appreciated. [quote]ORIGINAL: Ttowntoolman I race dirt oval. I started this season with 12 gallons on my os 25 XZ running great. I am now up to 14 gallons and still running great. I pulled the engine off to clean chassis last night, I still cant roll the flywheel all the way around with my finger. I see no end in sight.......and I usually set TQ every week with it! Engine has never been apart for any reason. [/quote] [/quote] Variables variables variables... A decently run in engine that isn't hammered too lean for too long should last 6-10 gallons.. And I think that goes for most brands.. LRP's (like the OS mentioned above..) don't have so much pinch when new like most race engines.. Your next LRP could last four, or ten... I say keep it rich-ish, with something more like 220ish as an ideal running temp.. I think with nitro there really is no replacement for experience. You can read stuff on the internet til you're blue in the face - sometimes it can be helpful too. But you really need to just have a feel for it, and that comes from being out there and burning nitro - there needs to be good smoke, performance needs to be good, and most of all it needs to sound right.. I've had lots of engines at this stage, and currently run about 6-7 of them, and am still learning how to tune to be honest.. The main thing in tuning is finding the right balance between the idle gap and the LSN.. The HSN is easy.. - get the other bit right, and then just richen and lean according to how it runs..
Posted on: 9/18/2012 1:04 AM by Author "HerrSavage" in the forum "RC Car General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11232036

RE: How much do you spend on your nitro buggy?
Get a Hyper buggy and have a blast.. Racing is an uptight money-pit.
Posted on: 9/17/2012 5:17 PM by Author "HerrSavage" in the forum "RC 1/8th Scale Buggies"
http://www.rcuniverse.com/forum/fb.asp?m=11231681

RE: what is normal nitro engine life?
As you said, ton of variables.. Fuel line, clutch bearings, tune, weather, plug, fuel, whatever... I'm kind of in to nitro engines, so have a few of them. I tend to like to buy engines in the less-than-$225 range, and run them til they die and get a new one. They rarely die on me though, so they usually end up getting sold. Even when I like them and they run well.. There are always new engines coming out, and new deals to be had.. But generally, I think all engines should definitely do six gallons with no issues, maybe and hopefully eight, and if you're lucky, ten.. With that kind of life I think you should be happy.. All the rebuilding, etc.. I think only really make sense with the very expensive engines like OS Speeds etc., or maybe just if you have an engine you really like.. As for LRP's, they don't need a gallon break-in. Ten tanks and go easy-ish for half a gallon maybe, and then off you go... LRP's, 454's, Big Reds, etc.. are all for me in the price range of "run them til they die and get something else if/when they do.." My Big Red is like three years old and still going strong, and my silver Mach older than that..
Posted on: 9/15/2012 10:20 PM by Author "HerrSavage" in the forum "RC Car General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11229732

RE: OFNA going away?!
Will this change the fact that Nitrohouse (with $30 minimum shipping fees to Europe, regardless how small..) and some ebay shop in Taiwan are the only places [i]on earth[/i] to buy an Ofna DM-1 clutch bell?.. [8|]
Posted on: 9/14/2012 12:53 PM by Author "HerrSavage" in the forum "RC Car General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11228567

RE: Best engine
[quote]ORIGINAL: llkoolskillet Cold plugs give you a better top end because you can lean the motor out more. My 59mph video, gearing is only one part of it. With the exact same gearing I went from 53 mph to 59mph. It's the tune that allowed that to happen. I have a video of my truck running odonnels race fuel 30% then switching to Werks 30% and you can see and hear the motor richen up a lot, because of the castor oil in the Werks that the odonnels doesn't have. I have a video of the truck running a cold plug struggling to idle, lean the LSN and properly adjust the gap and it will idle all day long. Also my truck hit 59mph with a OD100 medium plug not a cold plug. A cold plug would have pushed me past 60mph. Your comment on pinch, it's partially wrong. When the pinch is all gone it means the motor can make 100% power because it's not fighting the pinch. Yes your correct that after time the motor will start to fade in power. But this is after many many gallons and hopfully a rebuild. By then you have gotten your money worth from the motor. Piccos do not require special plugs and cost no more than an LRP 30. It's a better made motor and holds a tune so much better. Again for the 3rd time there your motors not mine and you are going to run them how you want. If your having fun good. I only raise the flag because some of the info is a little off. You cannot deny your tune can be so much better [/quote] Are you talking to me about pinch? Never mentioned it.. My tune could not be "so much better" without sacrificing top-end. Or having it go lean.. I don't baby my RC's, and especially my engines.. They last though, and deliver on power and speed. The tune could be better, sure.. But all of my SH engines are a in a good ballpark and give me great performance for the money(and minimal effort required..) Not a big deal, I know - and it wasn't even that pronounced.. - but you don't often see an LST2 lift the front on a 1-2 shift.. Especially [i]with a rich setting[/i]. I paid €60 for my LRP 30, new. And $100 for a brand new Losi 454 pulled from an LST2.. They are sold for that and less all the time on ebay.. Piccos may run marginally better, but they do cost more and require more to break in, tune, and set up to get the most out of them.. I ran with one once in an MGT and killed it so bad I felt embarassed for the guy.. I know they have more potential - and yours does run well.. But not everyone will be able to or care to invest the effort to squeeze all that potential out of it.. This plug, that pipe, that fuel, a gallon break-in, etc.. With an SH it's easy - unless of course you are running them too hot.. And all other things being equal, a Picco doesn't have all that much if anything over a Spec 3, 454, or Big Red in terms of speed..
Posted on: 9/14/2012 12:51 PM by Author "HerrSavage" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11228520

RE: Best engine
Try a cold plug and see... [;)]
Posted on: 9/14/2012 9:21 AM by Author "HerrSavage" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11228381

RE: Best engine
I'm not the one questioning what you know.. I am however stating that top-end is better - [i]unequivocally[/i] - with a cold plug. Yes, idle is better and the low end snappier with a hotter plug - but you lose top-end - %100. I'm convinced of that - again, have seen it over and over again.. The OD purple does seem to even things out a bit - good idle and good top end. So maybe what I'm against is just the OS #8 and the McCoy's.. But over and over I've tested and seen - better top end with an OS A5 - AND cool temps.. I only bother saying this stuff too btw because of people occasionally coming along and talking about "boiling fuel" and hassles with hot starts, etc.. Issues which I've never had.. People also talk about the "insulated carb" on the LRP 30X, but not on the pullstart version. I got the X version(and a PS backplate, with the idea of putting it in one of my LST2's later...), and the idle is night and day better than on say my Spec 3 or Losi 454. The Big Red does idle a bit better.. But none of the other SH engines I have tunes and idles as easily as the 30X.. I think with the cold plugs you're right - you do lose some bottom. But I mean, it depends a bit what you want. I like top speed more than wheelies.. In the clip you posted - yeah, those trucks were tuned very well, and were very responsive on the low end. Mine will still wheely, but they are a bit gurgly from the get-go. But they will scream on top-end all day long back and forth, without getting too overly hot temps that start making it make the screamy-lean sounds, etc.. AFAIC I'll run alongside a (stock, with all other things being equal..) Picco 28 on top end all day with my LST2's with Big Red and 454 - with rich settings and cold plugs.. Piccos probably have a better carb, so will idle better and maybe have better bottom.. They also take special plugs, a longer break-in, cost more, etc.. BTW, I'm not interested in arguing about this - just trying to share my experience which may or may not help other people with SH engines.. Not that hard to just try a cold plug and see if it helps.. And also, I'm not the first or only one to say that these SH engines run better at cooler temps... (not to mention live longer..)
Posted on: 9/14/2012 8:48 AM by Author "HerrSavage" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11228356

RE: Best engine
My LRP's are tuned just fine. And your 59mph is not exclusively down to "a good tune", but to gearing. But we can see where this going. Who fits where on the moronic virtual totem-pole of "I know more than you" RC cred.. [8|] I run my engines like I like and have fun doing it. End of story. If somebody is having issues tuning an SH engine, my advice is try a colder plug and accept a richer setting, and that these engines like to be run cooler. And anyone who thinks they can tune their SH engine for 280F with a nice idle and good top-end..., more power to you..
Posted on: 9/14/2012 7:49 AM by Author "HerrSavage" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11228264

RE: Best engine
...
Posted on: 9/13/2012 10:01 PM by Author "HerrSavage" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11227977

RE: Best engine
Brushless.. [8|] [:'(]
Posted on: 9/13/2012 9:57 PM by Author "HerrSavage" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11227976

RE: Best engine
[quote]ORIGINAL: llkoolskillet Like I said there your motors not mine and you don't need to show me proof. Also the reason you get more power out of a cold plug is because you can lean them out more ontop. But then again based off what you said you run them rich anyways so leaning them out for you would just be entering the performance tune stage. Again if your having fun and they work for you great. I just think you can get more power than you have with a better tune. I to like odonnels plugs OD100 and OD99 [/quote] No.. Leaning them any more on top - or bottom - would make them run hotter - and performance would suffer.. I admit the tune is a bit sloppy, but I accept this because performance and longevity are good. Leaning would sacrifice both. No amount of leaning is going to get more top-end, without running the risk of having them lean out over time. For a crisper idle you need a hotter plug. And again, a hotter plug means less top-end. And I am willing to sacrifice a nice idle in order to have a more screamy top-end.. I'm a WOT junky with my engines, and that's the kind of tune and setup I've arrived at.. I've seen other people here and there over the years who seemed to partially reinforce what I'm saying too - which is basically that SH engines run better at cooler temps.. If you see an LRP Spec 3 running at 280, it usually sounds awful..(lean) And I really believe that whereas a Picco or some of these Go's and Alphas will run fine at 280, for an SH IMO you're on the downside of the curve at that temp as far as the kind of power you can get out of the engine.. I'm not trying to lecture anybody either. I'm just saying what my experience has been and the opinions I've formed based on that.. I'm sure I could neaten up the tune on all of my engines - and now that I've been running more and more bug and trug engines, especially "higher end" ones like this RB and the modded Nosram(Picco), I'm trying to get a little bit more precise - for ex. with one hour adjustments or even less instead of big fat turns on the needles.. So there's definitely room for improvement in my tunes. BUT.... For the SH engines, IMO they run better at cooler temps, and if like me you like more top end(most of these big blocks have plenty of bottom for most MT's...), then I anyway run a cooler plug, keept the settings rich(especially the LSN), and just accept a spotty idle to get the overall most performance out of the engines that I can.. I really don't think a Spec 3 or Losi 454 is ever going to just sit there and idle all day without blipping for most people, and then run fine from bottom to top tank after tank.. So to somebody like steed having issues, it sounds to me like it's all too hot and lean. You're not going to get a great idle out of it - ever - non-insulated carb or whatever.. But if you accept a bit of blipping, the power peak is at a richer setting, at cooler temps. And for most power run either an OS A5 or purple Odonnells.. It's not silver bullet advice, but it's the best I can give anyway.. So steed, just try an OS A5/#10 and see what happens.. Amain still has the Odonnell purples dirt cheap too.. In fact, I think I might order some now...
Posted on: 9/13/2012 9:50 PM by Author "HerrSavage" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11227954

RE: Best engine
With a cold plug I see a noticeable increase in top end. And that many times on many engines over years. I've also raced truggy (and buggy) with a Mach 427, so racing would have preferred a hotter plug for better idle... But when going back to an A5 power was better. [i] Definitely[/i]. I've also spent plenty of time over the years messing with the tune on these engines trying to get a better idle but still have the power, but always come back to the tune with a rich-ish bottom and spotty idle, but with good top-end power. Also, part of my point is that I have NEVER had this "boiling fuel" issue - which IMO comes from running the engines too hot.. As stated earlier though, I really like the Odonnell purple plug. And dislike the OS #8 and McCoys..
Posted on: 9/13/2012 11:29 AM by Author "HerrSavage" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11227378

RE: Best engine
[quote]ORIGINAL: llkoolskillet [quote]ORIGINAL: HerrSavage ALL the SH engines I've had - three Mach 427's, two Sportwerks 26's, an LRP Spec 3, a Dynamite Big Red .28, a Losi 454, and now an LRP 30X, all run on the cold side.. IMVHO if you have them running hot, something is off. Back in the day 2DMAXXLST used to post videos all the time of his Machs and LRP's making good power
Posted on: 9/13/2012 9:00 AM by Author "HerrSavage" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11227274

RE: Since getting into this hobby, whats been the biggest leap forward you have seen in this hobby?
The Baja was the attention getter.. The Losi 5T though is a whole new ballgame.
Posted on: 9/13/2012 12:44 AM by Author "HerrSavage" in the forum "RC Car General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11226930

RE: Best engine
For me, more and more the "best" engine has more and more to do with price.. If I spend €200+ on an engine, my expectations are higher, and yeah, it's just nicer to get an engine for €64 shipped, like I did my Nosram RS.30RR (LRP 30X).. - from a shop, because they were just being sold off.. Knowing you got a good deal on an engine definitely makes it more fun to thrash it... [youtube]http://www.youtube.com/watch?v=s8XhXFWIZe8&feature=relmfu[/youtube] I'm also finding that, in this hobby, if you're patient, and willing to put in the time to look for and find and wait for the deals, you can get really good ones.. From now on I only really buy engines that I get basically stellar deals on.. There are too many out there to be paying full price... For people who don't have the time or patience to look and wait, fine.. But it really is crazy to see people trying to sell their Nosram RS.30RR's [i]used[/i] for €100+, because they paid the €230 new price.... BTW, anybody looking for a good buggy or truggy .21, amain has a good Go 5-port for $99.99... I had the older version(couple of them actually) - and it was a very good engine..
Posted on: 9/12/2012 10:38 PM by Author "HerrSavage" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11226888

RE: Best engine
ALL the SH engines I've had - three Mach 427's, two Sportwerks 26's, an LRP Spec 3, a Dynamite Big Red .28, a Losi 454, and now an LRP 30X, all run on the cold side.. IMVHO if you have them running hot, something is off. Back in the day 2DMAXXLST used to post videos all the time of his Machs and LRP's making good power at like 170, and racing at 200-ish.. This has been my experience too. I run a cold plug (OS A5/#10), and get good performance, not to mention life out of them.. That said, they do have a kind of erratic idle, that needs blipping to keep it from cutting out. For the price and power and ease of use, etc.. though I can live with that.. I especially like my Big Red and now the LRP 30X.. But honestly I loved my Machs and LRP Spec 3 too.. They just did their thing - and very very well... They all lasted forever too, except in the couple unfortunate instances where air filters flew off..(RIP Spec 3, which was still going strong at what must have been ten gallons....) Hot plugs IMO kill power. Here in this video, look at 1:55 and see where the Big Red kicks the wheels up on the 1-2 shift.. Making good power, and running 210ish probably, with an OS A5 plug - but possibly an Odonnell purple, which I am also liking very much.. OS 8's and MC59's etc.. I don't like so much.. http://www.youtube.com/watch?v=7kOPfSkcDcU I got my Big Red for like $130 at Amain, and being an SH engine, put like 4-5 tanks of an easy break-in through it, and then letter' rip.. Zero issues in like three years and I don't know how much fuel.. Cheap, simple, powerful, reliable.. THAT to me makes for "the best engine"... BTW, in that video the carb ball-end got ripped off the 454 in my basher LST2.. So I rummaged in some boxes and found an old Mach carb, and fixed it in two minutes.. The cheapness and ubiquity of SH engines are significant advantages.. ps IMO the ideal temp range for SH engines is 200-235.. This has been the case too with the 3-4 temp guns I've had, and all the engines.. Basically, once you hit 180, letter' rip, and maybe richen it a tiny tad if it gets too much north of 250...
Posted on: 9/12/2012 10:10 PM by Author "HerrSavage" in the forum "HPI Monster Truck Forum"
http://www.rcuniverse.com/forum/fb.asp?m=11226876

RE: Since getting into this hobby, whats been the biggest leap forward you have seen in this hobby?
5th scale has made huge leaps in the last five years or so since the HPI Baja came out.. Sure, electric has advanced a lot.. But who cares?... [:)]
Posted on: 9/12/2012 10:04 PM by Author "HerrSavage" in the forum "RC Car General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11226873

RE: Nitro or electric?
[quote]ORIGINAL: Cpoore5953  What are some good truggys in 1/8 scale in nitro.  In a reasonable price range [/quote] You've got some variables there.. If you don't want to seriously race, maybe the Kyosho Neo.. Is meant to be good value, and looks fast stock. Maybe add some decent servos, and search out some threads on it to see what upgrades might be useful.. Beyond that, for more high-end race kits, well, that's expensive.. Used maybe. But a Mugen or Serpent or whatever is probably only really sensible if you want to race. If you do, go to your local track and see what people have, try to talk to people, tell them you're interested in getting into it, and maybe somebody trustworthy there has something to sell...
Posted on: 9/12/2012 10:00 PM by Author "HerrSavage" in the forum "RC 1/8th Scale Buggies"
http://www.rcuniverse.com/forum/fb.asp?m=11226869

RE: Nitro or electric?
[size=7][b]NITRO.[/b][/size] [8D]
Posted on: 9/12/2012 12:59 PM by Author "HerrSavage" in the forum "RC 1/8th Scale Buggies"
http://www.rcuniverse.com/forum/fb.asp?m=11226395

RE: Racers v. Bashers (the vehicles not the drivers)
[quote]ORIGINAL: steed2 [quote]ORIGINAL: HerrSavage I kind of think RCU should be something of a bashers' refuge. Racers can talk about drilling their shock pistons and wax theoretical about 1,000 diff oil changes elsewhere.. [/quote] see but that right there is wrong, racers and bashers are the same people. we all share a common interest. [/quote] Yes and no.. Some people do both(myself
Posted on: 9/11/2012 9:14 AM by Author "HerrSavage" in the forum "RC Car General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11225067

RE: Sidewinder fuel
I would ask your LHS which one is more reliably available. SW is good, so I anyway would get whichever is cheaper.. But %25 if possible.. %20 is fine though..
Posted on: 9/10/2012 10:18 PM by Author "HerrSavage" in the forum "Car Nitro & Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11224619

RE: Racers v. Bashers (the vehicles not the drivers)
I kind of think RCU should be something of a bashers' refuge. Racers can talk about drilling their shock pistons and wax theoretical about 1,000 diff oil changes elsewhere..
Posted on: 9/10/2012 10:09 PM by Author "HerrSavage" in the forum "RC Car General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11224614

RE: Sidewinder fuel
%30 requires more fiddling with head shimming though, right?
Posted on: 9/10/2012 6:08 AM by Author "HerrSavage" in the forum "Car Nitro & Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11223556

RE: Sidewinder fuel
SW is good, but I always ran %25 (til i became unavailable here due to distribution issues of some kind..) It's very oily though.. The LHS guy always sold it as "not needing after run oil" because it was already in the fuel. It's good fuel that you can run without reservations. I would ask your LHS though about supply reliability, and yeah, find out what the other stuff is.. Byrons is meant to be really good..
Posted on: 9/9/2012 10:04 PM by Author "HerrSavage" in the forum "Car Nitro & Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11223354

RE: What RC-related fun do you have planned this weekend?
Thanks.. 2058 is on the way.. (and 086 - again - for the Nosram...)
Posted on: 9/8/2012 12:49 PM by Author "HerrSavage" in the forum "RC Car General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11221944

RE: What RC-related fun do you have planned this weekend?
Weird thing is though, it cut out at the end.. I don't have that much fuel through it yet, but for some reason there seems to be some kind of half-tank lean deal going on. Which is very odd - because with all the other engines I've run in it this year - modded Nosram(Picco) RS.21RR, Argus A52, LRP .30, Nova 5-port, etc.., there was no sign of it. The tune is somehow not quite right yet..(but that is part of the appeal of nitroIMO - get a good engine, and try to find the sweet spot, where the engine just makes music..) I do like the 053 pipe on it though. Initially I thought the bottom was weak-ish, but then reconsidered, given that it has +1 on the CB.. The LRP .30 is obviously more brutal on the low-end.. I like what I see from the Fire so far though.. Revs higher than anything I've had.. Think it needs some minor tweaks to be running just right..
Posted on: 9/8/2012 11:02 AM by Author "HerrSavage" in the forum "RC Car General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11221850

RE: How many gallons of nitro do you burn in a season ?
Hard to say.. A lot has come up the last couple years, so I haven't burnt as much.. At the moment I'd say eight-ish. In past years, more like 10-12-ish... Rough estimates though - I don't keep an exact count, and every year is different.. But I reckon eight-ish is a good rough figure. I recently found a gallon in the cellar I'd forgotten about, and think I'm just about done with it after three-ish weeks. I think I've broken in about 5-6 engines this year too.. Ideally I would burn 10-12 per year, given the shitty winter here. If the winter weren't so awful, I'd probably manage more like 15 or so.. A 4-liter canister of Tornado %25 btw costs €44.
Posted on: 9/8/2012 10:43 AM by Author "HerrSavage" in the forum "RC Car General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11221835