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Old 02-14-2010, 04:23 PM   #1
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Default lean low end causing overheating..??

on a race engine, COULD running the low speed adjustment even just a pinch too lean cause the engine to run hot..??
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Old 02-14-2010, 04:52 PM   #2
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A lean bottom end can cause it to run hot.
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Old 02-14-2010, 05:09 PM   #3
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but a lean bottom is better then a lean top
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Old 02-14-2010, 05:11 PM   #4
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this overheating problem seems to happen after racing for a few minutes...
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Old 02-14-2010, 05:35 PM   #5
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have you tried to richen it up when it starts running hot? if so it could be a couple of things clutch dragging air leak you could start out richen the top about 1 full turn and drive it till it gets up to temp if it still over heats when you richen the top i would say check for air leaks.
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Old 02-14-2010, 05:55 PM   #6
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lsn has the biggest effect on engine temps. pinch test never fails, clear out the motor on the box, after the motor drops to idle pinch the fuel line right before the carb with some needle nose and count to 4. if its still running when you hit 4 you are on the rich side, if it is dies before you hit 4 your on the lean side. if it dies right when you hit 4 you are dead on race tune, adjust the idle stop screw so the engine drops to idle about 10 seconds after clearing it out.
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Old 02-14-2010, 09:51 PM   #7
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do the shake test... clear the car out shake it if it winds it lean if you hit the gas afterwords and it bogs it rich. just learned this one from edd bridges(ebmods) when he was helping me last race. think thats the right directions lol
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Old 02-14-2010, 10:08 PM   #8
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No No NO.....


Shake some dried chicken bones in your hands and roll them out on pit lane.

If they spell "DEATH" you are too lean.

If they spell "MONEY" you are too rich.

If they spell "SUCCESS" then your tune is right on.

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Old 02-15-2010, 04:36 AM   #9
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Quote:
Originally Posted by Racecrafter View Post
No No NO.....


Shake some dried chicken bones in your hands and roll them out on pit lane.

If they spell "DEATH" you are too lean.

If they spell "MONEY" you are too rich.

If they spell "SUCCESS" then your tune is right on.

I just KNEW that has the right way.
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Old 02-15-2010, 10:28 AM   #10
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an overly rich low end can cause overheating to. say what??? think about it. you have a rich low end and dont know it. so while tuning you exibit a bog at mid rpm, so you lean the top end to get rid of it. An overly rich bottom end can cause a tuner to make and overly lean top end. which would cause overheating.
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Old 02-15-2010, 10:36 AM   #11
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Quote:
Originally Posted by Racecrafter View Post
No No NO.....


Shake some dried chicken bones in your hands and roll them out on pit lane.

If they spell "DEATH" you are too lean.

If they spell "MONEY" you are too rich.

If they spell "SUCCESS" then your tune is right on.

idk i just listen to mine,, and she tells me secrets.....
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Old 02-15-2010, 10:43 AM   #12
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on another very overlooked note a bad bearing in your drivetrain wheels diffs etc can also cause an overheat in your engine,also when you "clear"out your engine on the box it should not take 10 seconds to return to an idle
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Old 02-15-2010, 08:18 PM   #13
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thanks for the info, guys....will come in handy this coming w/e(motorama)...
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