Re: Will straight pipe hurt motors??

Posted by Jerry/MT on October 14, 2005 at 13:56:39 from (206.183.121.162):

In Reply to: Re: Will straight pipe hurt motors?? posted by Mike Van on October 14, 2005 at 01:15:19:

It depends what kind of racing you're talking about. The top fuel drag racers and funny cars use zoomies, straight pipes right of each cylinder. I believe the NASCAR guys use tuned headers that are matched to the high speeds they run. By having the correct length to diameter ratio exhaust system you can increase the through flow of the engine within a narrow speed range and get more power. It has to do with expansion waves being at the exhaust port when the exhaust valve opens.
The question asked here was what would happen if a straight pipe was added t the exhaust i.e. no muffler.

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