To go 2.5" or 3" exhaust??

[caseywan]

I am doing a motor build this winter and am debating going 2.5" or 3" exhuast.

Motor will be Boss 302 block stroked to 336, very heavily ported TFS heads, heavily ported GT40 lower with Kenne Bell 2.2 Flowzilla pushing 10-12psi, and 3:73 gears.

I'm thinking I am going to have some serious low end torque and am tossing around going 3" exhaust to even it out a little bit.

What do you guys think?

 

[rickd93_lx]

for forced air induction, especially at 10 to 12 psi i would recomend a 3 inch exhaust to help clear out spent gasses and allow for a frsher mixture in the cc's.
i would also recomend 1 3/4 inch lt's. back pressure and superchargers do not combine well. more boost does not nessisarally more power the less resistance the super charger has the more power you will produce even @ a lower boost level.

 

[86bluecobra]

i believe 2.5 inch is supposed to be good to around 400 ponies before it starts hampering performance. I have no doubt that combo will exceed that number so go with the 3 inch.

 

[f4fntm]

what they said ^

 

[tom23]

3 in. all the way

 

[LB0193]

3inch no q asked

 

[Grn92LX]

3"..And fyi, just because you put a "bigger" exhaust on does NOT mean you "lose" low end torque.

 

[5.0 Nostalgia]

3" without a doubt. If you don't want longtubes, Bassani makes a 1 3/4" short tube header for Anderson Ford .

 

[caseywan]

Ok, guess I will definatly be going longtube, thinking full Bassani with Longtubes and o/r x-pipe.

Thanks for everyones input.