OnyxCobra

not really opinion when a 3" exhaust doesn't make more power. 2.5" is more than enough for most setups. It's just like how most people over do throttle body size.

83gtragtop

No like I said you got to walk the line between velocity and back pressure. 2 1/2" is perfect.

83gtragtop

I think that you will find its an opinion alot of members here share.

94StinkinLincoln

opinions are like belly buttons, if you dont wash it, it stinks.

so im guessing that you would say the Vic Jr EFI, 1 3/4 LT's and 3in exhaust
is too big for my n/a 331...and a 90mm TB and Lightning MAF will be in order to replace my 75maf and 70tb...

83gtragtop

Cool man. Rice on.

jtmustang

wtf....rice on...?

94StinkinLincoln

rice on? last time i checked they only used 3in fart cans and 3in stickers.

and i guess 4.30s are too much for street use.

lets say *HYPOTHETICALLY* you have a 347 thats going to rev to 10,00rpms, you would use 2.5in exhaust?

94StinkinLincoln

i bet you would have afr 165's on it too

primetime5.0

holy crap a 90mm tb? NA? wow..

mjr46

you know what exhaust size is really needed??? 1 1/2 inch so you can increase the torque to twist driveshafts like a pretzel!!!! and if you really wanna unravel the driveshaft like a candy cane make it 1 inch exhaust!!! and do all of this with a 347 bottom end!!!! bwahhhhhaaaaahaaaaa lol...
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ now that is some funny crap what I just wrote...believe me there are some who believe that theroy above