Quote:
Originally Posted by Keros  "The best exhaust is no exhaust" |
Garbage...
Back pressure can be used to time the pulses on exhaust manifolds and headers. No back pressure or too large of tubes will cause exhaust to flow to fast, then at low RPM the exhaust pulses will just blow on past the collectors and no scavenging will take effect. On a street motor primary tubes should be an adequate but small size, this amount of restriction will keep pulses moving at a reasonable speed, and scavenging works great at lower and mid RPM.
Extensive dyno time will help a person tune their exhaust and headders to gain more tourqe under the power band.
