Originally Posted by
EFI-Unlimited
Hurst,
My generalizations were about overall backpressure, not header diameter and length. A more descriptive test for that would be to install a 1" muffler, a 1.5", etc to see what makes the most power.
Brian
EFI-Unlimited
Yes but whether its in the mufflers, the mid pipe (O/R vs Catted) or in the headers, some form of back pressure is created. From everything I have read and understand,.. a relatively stock NA motor will make more power with a small amount of back pressure vs something like open 2" headers. An all out race motor designed to spin 9k wouldnt be as effected by the lack of back pressure. Where, why and how,.. I honestly dont understand.
You made the generalization,.. I knew that you knew the answers. I just wanted to debate it so I could get you or Shawn to elaborate on it.
Hurst