dfw

**TrueStreetTim** · 09-14-2013, 06:21 PM

Originally Posted by Oxford14Stang

I'm just not sure what size headers I should run. Again will be N/A for awhile so I dont mind "wasting" the money for now for the right size headers and than sell them and go bigger. But would I make more power with the larger diam. while being n/a or would it just be overkill.

Both headers on a N/A setup will make similar peak HP. Difference is; the smaller header diameter will make torque, and more of it, sooner and more than likely more peak torque.

Headers are efficient until they become a restriction. In the case of a N/A, 302ci motor a 1-7/8 header is overkill and can therefore benefit with the increase in torque you find in a smaller design. A 370ci motor (LS3 etc) or a boosted 302.... 1-7/8 all day.

Personally 1 7/8 is great for blown applications and 1 3/4 for 302 cubic in n/a

This^

**Oxford14Stang** · 09-14-2013, 06:24 PM

Originally Posted by TrueStreetTim

Both headers on a N/A setup will make similar peak HP. Difference is; the smaller header diameter will make torque, and more of it, sooner and more than likely more peak torque.

Headers are efficient until they become a restriction. In the case of a N/A, 302ci motor a 1-7/8 header is overkill and can therefore benefit with the increase in torque you find in a smaller design. A 370ci motor (LS3 etc) or a boosted 302.... 1-7/8 all day.

This^

as the smaller diameter will make more tq, how much more are we talking about? I'm just shooting for 420-425ish hp and as close to possible tq to that horsepower. In a perfect world i'd like 420-425hp and 395-405tq