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What is a exhaust outlet?

I have a Traxxas T-MAXX 3.3 and it seems something in the exhaust has melted and blocked the outlet pipe..help

  • What ever has melted in the exhaust has blocked the exhaust and blown a hole through the side of the pipe.the engine still runs fine,i have a new exhaust on way but just want to know if i am doing anything wrong as i am a NITRO VIRGIN...Thanks for any help...

  • Answer:

    the only reason i could think of for "melted plastic" in the exhaust is running way too hot. the engine should be tuned for a max head temp of 260 degrees f. if too hot, richen it up, if too cold lean it. 260f is not anywhere near hot enough to melt the composite pipe or even the silicone coupler. also being and ABC (aluminum, brass, chrome) construction engine, going over 260 can start some premature engine wear, leading to failure. go to radio shack and buy an IR temp gun (around $20) and do a few short runs at full throttle then temp your engine. if over 260, richen it. under 260, lean it. this will give you prolonged engine life as well. FYI most engines will last 6-9 gallons of fuel if properly tuned and abused. i have a TRX .15 that is on gallon 16 believe it or not. and remember...... if you want race, being consistant wins more races than driving at full throttle all the time.

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Something IS wrong if the original hole is now sealed by melted plastic and a new hole has appeared. Take the manifold off the engine and clean it. Then richen up the top-end 1/4th turn and install your new pipe. I would suggest replace your fuel line at the same time (both the pressure line and the intake line). Get a temperature gauge and keep that engine around 230F.

Mikol

Sounds like your car was out of tune. I am unsure where you live but there should be a rc car dealer in your area that will beable to tune the car for you. I did a yahoo search for traxxas dealers in our area. We had to do the same thing for our son's car. Good Luck and Have Fun

dawnjohnson_4

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