Which header is better for a 383?
02-25-2008, 06:11 PM
#1
Which header is better for a 383?
For my application, wanting to have 380-420 horsepower at the wheels....
I have been looking at doing the hedman $150 long tube 1 5/8's to true duals or 3.5" catback. I've heard about some people having the nightmares with longtube headers (not just hedman, hooker included) and I've heard everything from oh 350's need 1 3/4 header
even with long tubes. Now I am certain that i would defiantly benefit from long tubes, but would i benefit with Dyno Don 1 3/4 shorty headers to my two cats as much as 1 5/8 longtubes? I would like actual experiences please, not just "I believe"
I have been looking at doing the hedman $150 long tube 1 5/8's to true duals or 3.5" catback. I've heard about some people having the nightmares with longtube headers (not just hedman, hooker included) and I've heard everything from oh 350's need 1 3/4 header
even with long tubes. Now I am certain that i would defiantly benefit from long tubes, but would i benefit with Dyno Don 1 3/4 shorty headers to my two cats as much as 1 5/8 longtubes? I would like actual experiences please, not just "I believe" 
02-26-2008, 01:14 PM
#3
Re: Which header is better for a 383?
I am running the AFR 190's and the exhaust ports just right for the 1 5/8 Hedmans.
I just check my AFR books and it calls for the felpro #1404 gasket for both the 190's and 195's. Have you done any port work on the exhaust?
I just check my AFR books and it calls for the felpro #1404 gasket for both the 190's and 195's. Have you done any port work on the exhaust?
02-29-2008, 05:44 PM
#6
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Car: 1988 IROC-Z
Engine: Fast Burn 385 Crate Engine / Accel DFI
Transmission: T-56
Axle/Gears: 10 Bolt Auburn Pro / 4.10 Gears
Re: Which header is better for a 383?
Im currently running a fastburn 385 with some headwork, single plane EFI, comp xfi cam stock zz4 shortlblock 350ci making 390hp and 350ft/lbs to the wheel through SLP 1-3/4 Headers, 3" catback and factory SLP muffler. Peak power is 6500rpm peak torque 5000rpm. Made 400hp and 360ft/lbs with the dump open. Hope that helps you out.
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