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Post by rafiki5396 on Sept 12, 2004 1:12:55 GMT -5
ok stupid question, has anyone tried just a stright pipe, w/o a muffler at all, idealy that will give the most power, i am machinacly incline and i know u need a pipe of some short of cold air will rush back into the engine and possibly crack a valve, but how lound is a stright pipe, put the back
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Post by abe on Sept 15, 2004 6:12:44 GMT -5
VERY LOUD  No gains really, you need backpressure ;D |
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Post by ben91932 on Oct 7, 2004 0:32:01 GMT -5
No gains really, you need backpressure ;
Exhaust design is a black art. Its not about backpressure so much as it is about back pressure pulses. The correct exhaust would have a full wave back pressure pulse timed such that it would provide suction through valve overlap to draw more air/fuel into the combustion chamber, then a reflected pulse timed to hit the exhaust valve port just before the exhaust valve closes... all with a chamber at least twice as large as the motors displacement.
Lots of trial and error to make real gains.
Ben
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