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+--- Forum: Engine / Drivetrain (https://www.chitownrc.com/forum-17.html)
+--- Thread: engine tuning help needed (/thread-2826.html)
engine tuning help needed - mikecooper - 02-28-2006
Can someone fairly good at tuning T-maxxes, maybe meet me somewhere and help me tune mine, because I finally got it running with the pullstart, but now the tuing is horrible, and it seems no matter what I do I make it even worse, so I don't want to ruin the engine trying to tune the thing the wrong way. Let me know where and when if you can.
engine tuning help needed - Traxxas_Junkee - 02-28-2006
what is it doing, maybe someone can help you here if it is simple
engine tuning help needed - mikecooper - 02-28-2006
it is bogging down somewhat when I hit the gas, so I figured it was running to rich, so I leaned it out some and it was still doing that no matter how lean I went, or how rich.
engine tuning help needed - Traxxas_Junkee - 02-28-2006
got a good glow plug? over heated? is it ok when you first start it up?
engine tuning help needed - kevinF - 02-28-2006
take the motor off and spin the clutch bell----if it doesnt spin freely at all then thats your problem most likely. I had the same problem
engine tuning help needed - thenewguy821 - 02-28-2006
Does it Bog briefly, then pick up, if so, it is probably the Low speed needle. Try to lean the Low speed a little, and see if that helps.
Another way to check the LSN, is to pinch off the fuel line about 1 inch from where it enters the carb. Count the seconds till the engine dies. The RPM's should raise slightly, and the engine die around 3 seconds. If it dies under 3 seconds, the LSN is too lean. If it stays running much more than 4 seconds, LSN is too rich. From there, you should be able to run the engine up to temp, and check your High Speed settings.
I know some people don't like the "pinch test", but I have had good results. It helps get the engine in a decent running tune, so it is easier to fine tune.
engine tuning help needed - mikecooper - 02-28-2006
yep I talked to traxxas junkee over aim(a couple hours ago), and it was the low speed, not sure if it is fixed yet, because when I went to go do it, I realized my glow igniter was pretty much dead, so it is charging overnight, so I will find out tomorrow.
engine tuning help needed - Traxxas_Junkee - 02-28-2006
i just had him put the low speed to facotry settings, he said that if he leans the idle it starts creeping forward, and if he richens it, it dies.