Originally Posted by
Hurstmeister
...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... ...Where, why and how,.. I honestly dont understand...
This is the core of this debate. Most everything I have tested says that a relatively stock motor will make best power with an open exhaust past the collector. However, the perception that back pressure would improve it, is fairly strong among performance enthusiasts. Honestly, I would like to see a real test of this exact scenario to either bust or confirm this 'gear head myth'
Brian
EFI-Unlimited