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Old 04-27-2009, 08:00 PM
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DocDirk DocDirk is offline
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Join Date: Jun 2006
Location: Merced, Ca
Cobra Make, Engine: West Coast-Ford Performance Solutions 533 BB
Posts: 390
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Question Header size vs torque make a difference?

Reviewing my dyno report on my BB 533 stroker Ford engine I find that it was run with 1.75" OD headers and measuring my current ones that came with my kit, they're 2.00" OD. I've heard or read somewhere that a smaller headers would result in higher torque - would a change as above result in a noticeable difference? I know there are many ways to optimize low end torque, but I'm wondering, all other things being equal, if the header diameter is a significant contributing factor or not.

Thanks!

Dirk
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