Goliath205

Hi,

I couldn't find a newbie section to introduce myself so thought I would just plunge straight in with the questions!

I recently bought a load of petrol (nitro/whatever its called) powered RC car bits from a friend who was selling off all his stuff. Now I have no idea what I have got so will get some pictures up soon for you all to have a look at, I have never had any RC stuff before so no idea what I am looking at.

Included in the bundle he sold me was a complete working car (minus a remote, which I have since purchased), I have no idea what make it is but I think it is a 1/10 scale, 2wd (but the chassis will accept 4wd), belt driven and it came with a couple of shells that fit on (Skyline and Viper).

I don't think it is setup quite right though, both the engine and the chassis, as it doesn't run completely smoothly and is hard to keep in a straight line.
When driving it will happily spin 180 with the slightest hint of throttle (worse on damp ground), is this likely to be down to a lot of power from the engine coupled with my limited driving skill or is it more likely to be a problem with the chassis setup? I am thinking it could be the tracking which is out on the rear wheels, I have adjusted them by eye and they look straight, or maybe something to do with the camber?

The engine is quite difficult to start at times, I think it may be overfuelling as I get some excess fuel coming out of the exhaust. There is a pipe running from the top of the fuel tank straight to the exhaust, I was told this was an 'afterburner' but I am not convinced! Also on full throttle the engine will cut out after about 1 second or more of full throttle, any ideas?

I will get some pics up soon, thanks in advance for your help, I'm glad to be onboard <br type="_moz" />

BKoz559

My Feedback: (3)

Welcome to the hobby friend!

It's difficult to diagnose your car without seeing it but for starters I will tell you that the hose connecting the exhast and the fuel tank is in fact NOT an afterburner. Exhaust pressure from the muffler is transferred through the hose into the fuel tank so fuel will be pressured into the carb. Otherwise the engine has insufficient suction to suck a steady supply of fuel into the engine.

Provide a few photos so we can evaulate your car.

gelbschnee

It sounds like you're running the engine pretty rich. try turning your high speed needle (pictured below) in small increments (1/8th turns) until you get some better performance. I'm not a nitro pro by any means so the sooner that we can see some pictures the better. Then hopefully you can get a hold of some manuals and go from there.

With 2wd, and a decent amount of power, it's very easy to spin out your rear tires and do cookies. Some practice driving should help you out!!!

magnus213

The problem of spinning out definitely sounds like a result of the 2WD thing. RC is largely 4WD for that reason. I'm not sure exactly what it will take to get your car back to 4WD at this point (hard to say without seeing it), but you'll probably want to make that happen.

To clarify the tuning suggestion above, I notice he says to turn the needle to lean it out, but he doesn't say in which direction. You're going to want to tighten it, so turn it clockwise, to lean it out. Just keep the mental image in your head that you're screwing in and blocking the fuel line a little bit more with each turn, lowering the portion of fuel and therefore leaning the motor.

The line running from the exhaust to the fuel tank is a pressure return line; it uses the high pressure in the exhaust to keep fuel moving out of the tank. I believe.

Goliath205

Thanks for the help guys, that sounds more reasonable about the tank return pressure pipe!<div>
</div><div>I have tried fiddling about with the  mixture screw, I think it is very close to right but just not quite there yet. What about the little idle(?) screw just near the carb? I have adjusted that too but it seems to have done bugger all!</div><div>
</div><div>I have managed to get a couple of pics, not very good ones though.</div><div>
</div><div>Here is all the stuff I bought from my mate, it all cost me £120, would you say that is a good deal or overpriced? (I have no idea what these things go for!) I have since spent £45 on the remote and transmitter, £12 on fuel, £12 on new wheels, £12 on a new go starter (turns out I didn't need it though!) and a couple of quid on a wishbone that i snapped on the O/S front!</div><div>
</div><div></div><div>
</div><div>And here is the little beast itself! A bit battered, I need to get a new cylinder head at some point as I rolled it and managed to break it a bit as you can see </div><div></div><div>
</div><div>Its awesome fun though </div>

hpidriver94

well to go back to 4WD you need a diff

Edit: oops i didnt read the first post very thoroughly you will need extra belts

rcslsafut

just looking at the pics kinda looks likt the front tires out of adjustment .that could make for difficult drive also. as far as the tuning thing there is a lot of
videos on you tube about how to tune a rc. its something you learn by experiance is how i can best put it ,but those vids should get you pointed in the
righht direction. hope that helps.