header questions again.
Re: header questions again. Jeff, the design theory behind stepped headers is that, if the length & diameter is designed properly, they will extract more usable torque by increasing exhaust gas velocity and scavaging from a given motor than a single size tube due to the exhaust gases expanding as they leave the combustion chamber. You will actually see some Pro-Comp cars using a 3 step header design instead of 2 step to truly maximize results <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />
Unfortunately the sizing is very motor dependent. Spec's that should be considered when designing a stepped exhaust include: cam size, head flow, torque curve and peak usable HP.
Hope this helps.
Unfortunately the sizing is very motor dependent. Spec's that should be considered when designing a stepped exhaust include: cam size, head flow, torque curve and peak usable HP.
Hope this helps.
