Re: straight pipe burns valves??????

Posted by Steve - IN on July 01, 2003 at 13:47:50 from (12.223.205.149):

In Reply to: straight pipe burns valves?????? posted by rustywallace2 on July 01, 2003 at 11:58:37:

If Rusty Wallace was worried about burned valves at the end of 500 or 600 mile race -- he'd run mufflers in NASCAR, don't you think? Last I heard, they run straight pipes.

Heat burns valves. You make the exhaust valve run hot by runnning lean, having ignition timing way off, cam timing way off, or high compression / low octane combinations. More exhaust flow lets the heat flow away from the exhaust valve quicker. Make sense? Free flowing exhaust will give you more top end power at the expense of low end torque and will give you hearing problems over time.

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