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Author Topic:   Exhaust Pipe Sizes
Dirt Roller

Total posts: 14
posted July 17, 2001 01:37 AM
How does one determine what size exhaust they need for an engine? I run an Hobby
stock w/350sbc standard bore,flat tops,9-1, rochester2bl.,Oemheads,cast intake and exhaust--the cars I race against
have anywhere between 2-3" pipes on their cars.

Dirt Full Roller

Total posts: 32
posted July 17, 2001 05:52 PM
I would think 2", 2 1/4" max would be plenty for a stock intake/exaust set-up. Alot I've seen only run them 1/4 to 1/2 way back on the car anyways, and you want some back pressure.

Dirt Full Roller

Total posts: 66
posted July 18, 2001 12:52 AM
How long do you think the pipes should be to create enough back pressure? Is there anyway to make more power out of stock exhaust manifolds?

Dirt Maniac

Total posts: 165
posted July 18, 2001 12:57 AM UIN: 54865418
the way we always tell where to cut them is make them plenty long and then paint them white start the motor let it run for a while then cut it off where the paint stopped burning off

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