exhaust size
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Senior User
Joined: Feb 2003
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exhaust size
i have a 76 f250 and am trying to decide what size of exhaust to put on it.
it has a stock 2v 390 i was considering 2-1/4" duals with glass packs that dump before the rear axle. others have told me to use2-1/2 or3" what are advantages and disadvantages of the different sizes (performance, fuel economy and sound) And any suggestions on length of glasspacks?
I'd like a heathy tone without the db of straight pipes
highrider
it has a stock 2v 390 i was considering 2-1/4" duals with glass packs that dump before the rear axle. others have told me to use2-1/2 or3" what are advantages and disadvantages of the different sizes (performance, fuel economy and sound) And any suggestions on length of glasspacks?
I'd like a heathy tone without the db of straight pipes
highrider
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
I run 2.5" on my 446 cubic inch FE. I think if you go with that, you can handle most FE builds with ease. If you start talking 500+ Cubes and 6500+ revs, you can splurge for the 3".
Stan at Ford Powertrain Applications, FPA, made my headers and thought that 2.5" was adequate. He's got a lot of experinece with exhaust and FEs as well.
Stan at Ford Powertrain Applications, FPA, made my headers and thought that 2.5" was adequate. He's got a lot of experinece with exhaust and FEs as well.
Posting Guru
Joined: Aug 2001
Posts: 2,117
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From: Evanston, WY
If you have your heart set on glasspacks, get them fairly long, or you'll be angering the neighbors and looking for earplugs on a longer drive. I've got a nice 0 miles set of Dynomax race magnum 3" glasspacks that I'm gonna sell cheap. I never even drove my truck before I changed to the Hooker Aerochambers.
-Scouder
-Scouder
