RE: O.S. .12 CV
Stock they are not really powerful, but with some work they rip. Rock solid reliable engine, easy to tune, holds a tune forever.
Posted on: 3/4/2007 7:04 AM by Author "jkulhanek" in the forum "RC Nitro Stadium Trucks"
http://www.rcuniverse.com/forum/fb.asp?m=5507184

RE: afterrun oil sub?
Just get into a habit of running the fuel tank/engine dry at the end of each day of bashing or racing or whatever. Put the glowstarter on and crank the engine til it will no longer fire. If you keep your vehicle in a fairly consistant climate (i.e. inside your house at night) rust shouldnt be a problem, but you should use a squirt of after run if you don't plan to use the vehicle within say 2 weeks.
Posted on: 2/28/2007 9:22 PM by Author "jkulhanek" in the forum "RC Nitro Stadium Trucks"
http://www.rcuniverse.com/forum/fb.asp?m=5491143

RE: EXPLAIN WHAT THE DIFF IN THIS ENGINES.
Two of them have a regular threaded crankshaft, one of them has a short shaft for RC10GT's and a few other models.
Posted on: 2/23/2007 6:53 PM by Author "jkulhanek" in the forum "Car Nitro & Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=5464615

RE: good rc for under 300?
I hear with a decent pipe a 2.5 hits 60,000!!!! [8|][:D]
Posted on: 1/21/2007 2:54 AM by Author "jkulhanek" in the forum "RC Nitro Stadium Trucks"
http://www.rcuniverse.com/forum/fb.asp?m=5298343

RE: Your LHS is............
I practically refuse to support my LHS. The people behind the counter are no help, they couldn't tell you anything about what they sell, except the price, and are only too happy to rip you off and slack. If I got good service I wouldn't mind paying a little bit extra...
Posted on: 1/13/2007 11:56 AM by Author "jkulhanek" in the forum "RC Car General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=5258358

RE: what plug to buy for koysho gx-12
O.S. A3, Tower Hobbies Glow Plug (O.S. A3, but cheaper), O.S. #8, or O.S. A5 for 35% + nitro.
Posted on: 1/1/2007 9:35 AM by Author "jkulhanek" in the forum "Car Nitro & Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=5191399

RE: spring broke were can i get one
You do realise theres literally thousands of different .12's on the market, so nobody can tell you what will work until whe know what yours is. Usually a pullstart without the oneway bearing is pretty cheap.
Posted on: 12/27/2006 7:39 PM by Author "jkulhanek" in the forum "Car Nitro & Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=5169762

RE: how is that mini-z monster truck by kyosho?
nope, they use a '130' sized motor.
Posted on: 12/11/2006 7:13 AM by Author "jkulhanek" in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=5101440

RE: picked up a losi Micro-T yesterday..video
[quote] he says he can do the size of a pennie with a 1 cell lipo. i didn't believe him [/quote] Do a google search on 10mah lipo cells [:D] Much, much smaller than a penny. E clips on the axles??? URGH!!! When do we get one without the AA's and crappy charger? Also want adjustable turnbuckles, oil shocks etc....I don't ask for much [:)]
Posted on: 12/11/2006 7:12 AM by Author "jkulhanek" in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=5101433

RE: newest versions of mini 4 strokes in a 1/5 scale??
[quote]ORIGINAL: Gary_C I guess these motors aren't overhead cam arrangement. I dont see how you can lube the overhead valve train and not fill the valve cover with oil if it goes upside down. I must be missing something or there's some new technology out there. From the picture it sure looks like a valve cover, and it looks like its vented. Help me out here? [/quote] The crankcase has a special blade or 'slinger'. This turns the oil into a mist which is constatly pumped around the engine. They only hold 100cc (3.5 oz) of oil.
Posted on: 11/29/2006 5:37 AM by Author "jkulhanek" in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=5052744

RE: newest versions of mini 4 strokes in a 1/5 scale??
[quote]ORIGINAL: badz For these car's something like the honda's aren't too practical, they are large and heavy. Probably the only way to really thumper one would be tossing a Saito 1.50+ in it. [/quote] I don't know where you found your info, but the new hondas are barely much heavier than a zenoah... Not much bigger than a zenoah either. With a few mods (higher compression, better carb, exhaust etc) these are as fast or slightly faster than a stock G260RC and rev over 11,000 RPM. While I love the tinny sound and savage powerband of a blue smoke, I choose to ride a thumper [:D].
Posted on: 11/29/2006 5:34 AM by Author "jkulhanek" in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=5052742

RE: 5HP!!!???!??!?!?
I don't know if any of you have ever had to push a car, but there is no way in hell that is real.
Posted on: 11/29/2006 1:27 AM by Author "jkulhanek" in the forum "RC Monster Trucks"
http://www.rcuniverse.com/forum/fb.asp?m=5052462

RE: ducted tail fans....info..please
[quote]ORIGINAL: Karyn [quote]ORIGINAL: jkulhanek my E-sky Honey Bee FP Heli. My heli now runs a GWS pico rx, GWS pha-01 gyro, Sagami 280bb motor with GWS heatsink, Venom nightranger chassis and swashplate control rods, GWS battery bracket, GWS EDF-40 ducted fan tail, GWS dragonfly head, horizontal whip antenna, 200mm flybar w/larger weights, 7.4v 1800mah Li-Po's. [/quote] The only parts
Posted on: 11/8/2006 11:50 PM by Author "jkulhanek" in the forum "Electric RC Helis"
http://www.rcuniverse.com/forum/fb.asp?m=4973354

RE: ducted tail fans....info..please
[quote]ORIGINAL: johnnycat500 the pics look like you shortened the tail boom. if you did how much...thank you [/quote] Sorry for the late reply, forgot about this thread. I cut the tail boom to 215mm. However I suggest you cut your boom till your heli is balanced, since my tail fin etc is my own design, it might be different in mass to the helihobby.com one.
Posted on: 11/8/2006 7:39 AM by Author "jkulhanek" in the forum "Electric RC Helis"
http://www.rcuniverse.com/forum/fb.asp?m=4969759

RE: ducted tail fans....info..please
[quote]ORIGINAL: Karyn [quote]ORIGINAL: jkulhanek my E-sky Honey Bee FP Heli. My heli now runs a GWS pico rx, GWS pha-01 gyro, Sagami 280bb motor with GWS heatsink, Venom nightranger chassis and swashplate control rods, GWS battery bracket, GWS EDF-40 ducted fan tail, GWS dragonfly head, horizontal whip antenna, 200mm flybar w/larger weights, 7.4v 1800mah Li-Po's. [/quote] The only parts
Posted on: 11/1/2006 12:21 AM by Author "jkulhanek" in the forum "Electric RC Helis"
http://www.rcuniverse.com/forum/fb.asp?m=4940745

RE: ducted tail fans....info..please
Hi, I have a ducted fan (GWS EDF-40) setup on my E-sky Honey Bee FP Heli. It's not as efficient as a gear reduction swinging a larger prop, weight isn't too bad as you can take about 8mm off the back of the DF unit's rear side, and make a fairly light fin. It seems to be an improvement on the stock E-sky tail rotor setup performance wise and spools up much quicker, allowing the heli to change yaw quicker and make gyro corrections more accurate. The main reason I changed was that I got sick of breaking tail rotors and liked the cool factor of a DF tail. Also blew the stock E-sky tail motor. My heli now runs a GWS pico rx, GWS pha-01 gyro, Sagami 280bb motor with GWS heatsink, Venom nightranger chassis and swashplate control rods, GWS battery bracket, GWS EDF-40 ducted fan tail, GWS dragonfly head, horizontal whip antenna, 200mm flybar w/larger weights, 7.4v 1800mah Li-Po's. The Sagami 280bb/Greatplanes Elictrifly 280bb is a brilliant brushed motor for the money, plenty of power and RPM's, runs cool without a heatsink (more efficient therefore more runtime). If you don't already have Li-Po's, I'd say thats a definate step forwards.
Posted on: 10/31/2006 8:49 AM by Author "jkulhanek" in the forum "Electric RC Helis"
http://www.rcuniverse.com/forum/fb.asp?m=4937178

RE: Jato 3.3 tire blew up
[quote]ORIGINAL: Kemo sounds like traxxas could have a few lawsuits on their hands. [/quote] What is it with yanks and suing everybody for every possible reason instead of perhaps helping traxxas fix the problem? Everybody is so obsessed with getting a free lunch from whoever they can...It's a disgrace.
Posted on: 10/31/2006 7:14 AM by Author "jkulhanek" in the forum "RC Nitro Stadium Trucks"
http://www.rcuniverse.com/forum/fb.asp?m=4936909

RE: O.S. 18 CV-R on Tower Hobbies
I do not know why they are so cheap, but they are without a doubt the BEST value for money engine on the planet. Reliable, long lasting, powerful, easy to tune, holds a tune....what's not to love??
Posted on: 9/20/2006 7:38 AM by Author "jkulhanek" in the forum "RC Car General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=4770590

RE: Wipper snipper
The average weed eater motor is pretty low performance compared to the engines used in 1/5 cars.
Posted on: 9/2/2006 4:49 AM by Author "jkulhanek" in the forum "Car Nitro & Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=4700133

RE: NItro Sport
It's down the lower end of the scale performance and equiptment wise for an RTR. Old design and technology.
Posted on: 8/7/2006 7:46 AM by Author "jkulhanek" in the forum "RC Nitro Stadium Trucks"
http://www.rcuniverse.com/forum/fb.asp?m=4592356

RE: dye fuel
I was reading the ingredients on the dyes at the supermarket, and they all contain water which was a worry to me...
Posted on: 8/3/2006 4:16 AM by Author "jkulhanek" in the forum "RC Fuels"
http://www.rcuniverse.com/forum/fb.asp?m=4577949

RE: My First Engine Mods...
UPDATE: My dear little O.S. .12 and I had a great time, but alas it had to come to an end...lol A 5 hour continuous bash in mud, dirt and sand dunes and negelcting to change the air filter meant it sucked in a load of dirt and lost all it's compression [:'(]. The piston and sleeve fit was so loose that the piston would actually slide all the way through the sleeve. So I ordered a new duratrax ABC piston/sleeve and rod, and also a new backplate. Before cleaning and reassembling the engine I decided to modify it more. Some of the mods are the same as the worn out piston/sleeve/rod. -Cut port channels in the new sleeve with angled cuts to help the scavenging. -Removed the skirt on the piston and left just enough to make sure the exhaust port was always sealed off from the crankcase. The original modified piston just had bits removed to de restrict the transfer ports. -Knife edged the new rod. -Enlarged the port channels on the crankcase, and ground a channel out for the boost port, which never had one originally, now the boost port is fed like a normal transfer port. -The inside of the crankcase has been contoured and smoothed out and has channels angled to help direct the fuel/air into the transfer channels. -The top edge of the backplate has been sculpted to direct fuel/air up to the 270 degree transfer channel, the old one had lots of sharp edges and corners which I didnt like. -I also polished the intake to mirror finish and matched the venturi to the carb a bit better than before. -All components (apart from piston/inside of sleeve) were polished to mirror finish and the engine put back together. I began break in of this engine and it was immediately apparent that it had more authority than before, had more torque, and towards the end of break in it had noticeably more power than ever. Unfortunately, the pull start one way bearing died and I have been unable to start it. But stay tuned for updates.
Posted on: 8/1/2006 4:17 AM by Author "jkulhanek" in the forum "Car Nitro & Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=4569548

RE: Jetpro Baja 5B Video
[quote]ORIGINAL: jack2piper you could realy notice the speed increse but its got to go. you should try a strait pipe going out of it [/quote] Do you think they make pipes look like that because they feel like it? No, the pipe has to be a particular length, thickness, and have certain divergence cone and convergence cone angles and lengths etc to make the pipe work with the engine to produce more hp.
Posted on: 6/30/2006 6:57 PM by Author "jkulhanek" in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=4449897

RE: New to FG
Be careful not to make that thing too heavy!
Posted on: 6/19/2006 6:26 AM by Author "jkulhanek" in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=4405747

RE: Jetpro pipe for baja 5b
[quote]ORIGINAL: Jloc I don't have a baja parked in my garage yet....but should very sooon!!! And when I do....yes....most likely the motor will be swapped out for a custom built Zenoah. [quote]ORIGINAL: Doohan Jloc, what big bore are you fitting?...Zenoah 29cc?...will it bolt straight up? Make sure you post some pics! [/quote] [/quote] Waste of time spending a heap of cash on a new zenoah engine, keep the stock engine and upgrade the top end with a GP290 BBK or a CY29RC headkit/stroker kit. Either of those setups will eat zenoahs left. right and centre. For the record, there is NO such thing as a zenoah 29cc engine. They only make 23 and 26cc motors.
Posted on: 6/19/2006 6:17 AM by Author "jkulhanek" in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=4405732

RE: Baja drive shaft boots
[quote]ORIGINAL: Timmahh did you get it with the Z engine or did you stick with that cheap cy? [/quote] What's wrong with CY engines?
Posted on: 6/5/2006 4:43 AM by Author "jkulhanek" in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=4354467

RE: ? about crankshaft balance. TRX 3.3 feels weird
Once the piston and rod are on it and spinning it will balance it Truth be told you will never get a single cylinder engine balanced, you may get near, but never balanced.
Posted on: 6/5/2006 3:11 AM by Author "jkulhanek" in the forum "Car Nitro & Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=4354397

RE: HPI Baja Shipping
I am getting it shipped from interstate (within Australia) for about $950 US + shipping.
Posted on: 6/4/2006 10:29 AM by Author "jkulhanek" in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=4351362

HPI Baja Shipping
Can some kind being please measure the dimensions and weight of the HPI Baja box? I'm trying to calculate shipping and need the specs. Can't wait to finally get a gasser!!!
Posted on: 6/4/2006 7:05 AM by Author "jkulhanek" in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=4350967

RE: STUPID BACKPLATE!!
Engine is tuned fairly lean, fuel is my own brew 12% synthetic 3% castor. Just seems to me that bushed backplate is a crap design, why not use a sealed Ball Bearing? Perhaps dirt has been working its way into the bushing and causing wear?
Posted on: 6/4/2006 6:48 AM by Author "jkulhanek" in the forum "Car Nitro & Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=4350945