Quote:
Originally Posted by jspeedm
a straw is straight and does not change diameter and also you're not going to get 100 degrees of temperature change in a straw. so that analogy is pointless.
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No you dont get it. Who said anything about temp?? Exhuast deals with flow/velocity. Flow is the speed of air. You flow FASTER with a small straw. With a big straw you can flow MORE air but at a SLOWER rate.
Quote:
Originally Posted by jspeedm
that's backpressure.
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No its not backprssure. Please tell me houw a free(er)-flowing exhuast causes back pressure. Thats like saying an air pump pushing air into the atomsphere has backpressure, no it doesnt. You cant measure pressure of the air flowing out.
Quote:
Originally Posted by jspeedm
the only way for an exhaust pipe to hurt scavenging is by creating backpressure in the manifold or header and shortening the exhaust pulse width. but yes, bend in the pipe do not help.
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You tune the exhuast as a WHOLE. So if you have restrive mid pipe,bends/dia. then it will effect how the exhuast gases are pulled out.
03-08-2009, 07:55 PM
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