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to rich or to lean??

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T

tbsleeper

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the last two times i have bashed i have had a little problems with my car. the engine after running for a while when it gets hot, it keep revving when u slow down? like i will be going around the basebally field and i will slow down to look at it see how everything is and wen it gets close to me and i dont hit the brake so it will slow down it will keep making like a weird revving noise. this also happeans when i am got WOT then let off the gas it keeps revving? can someone tell me whats wrong. thanks!!
 
Each time you run you may need to adjust your carb. There are a lot of things that can affect the performance of the engine such as temp outside, humidity, altitude, etc. It has gotten warmer out lately so you may need to make adjustments for that. How much of an adjustment depends entirely on your engine and your existing settings.

It could be a bit lean. Try richening the LSN until the RPM changes. I would guess about a quarter of a turn. If that doesn't affect it you may need to lower your idle speed. There is an idle speed needle which controls how far your carb will close when it is all the way closed. Also check your throttle servo. You may need to make an adjustment in that area to make sure your carb is closing properly.
 
do think it could be the lenght of the pressure line? right not its like 4'' long
 
4" is fine. (You could make it longer if you want). I don't think changing the length would have a lot of influence on the idle speed.
 
With a 4" pressure line, a lot of pulsing from the exhaust will enter the fuel tank. Pulsing can cause the fuel to bubble/foam resulting in a fuel-air mixture before it even reaches the carb. Obviuosly this means it will run lean and 'idle fast'. Check out this article on Tuned Pipes. It talks a bit about pressure and fuel lines near the bottom. I'm running an 8" pressure line on my .26 right now, and it needs to be lengthened more.

- bomber
 
ya i gotta get some more fuel line to see if that will do it then i will go from there
 

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