Any 1-7/8" 32" Primaries Headers for C5?
Thread Starter
Joined: Aug 2004
Posts: 11,258
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From: Pace, FL
Any 1-7/8" 32" Primaries Headers for C5? I'm looking for longtubes for my big cubic inch engine. Unfortunately, the C5 probably has the best headers on the planet available for STOCK Displacement.
Oh, you thought those 1-7/8" headers were fine? Well, above 5500 they are, but the 24" primaries kill 3000-4500 torque on big cubes, and I mean like 35-45HP in that range versus a 1-7/8" on a 30" primary, with the same top end.
According to my calculations, a 32" primary with a 2" header would be perfect for my combination. However, I don't think that's reasonable, so I'm willing to go 1.875" to keep power down low without killing all high end power. The same calculations say a 24" primary requires a 2-2/3" header!
So, are there any long primary, big tube headers out there for the C5? Or any on the horizon? I thought LG was doing a stepped 1-7/8 at 32" but is there anything else?
Btw, my calculations come from the formulas found in A. Graham Bell’s Performance Tuning in Theory and Practice.
Oh, you thought those 1-7/8" headers were fine? Well, above 5500 they are, but the 24" primaries kill 3000-4500 torque on big cubes, and I mean like 35-45HP in that range versus a 1-7/8" on a 30" primary, with the same top end.
According to my calculations, a 32" primary with a 2" header would be perfect for my combination. However, I don't think that's reasonable, so I'm willing to go 1.875" to keep power down low without killing all high end power. The same calculations say a 24" primary requires a 2-2/3" header!
So, are there any long primary, big tube headers out there for the C5? Or any on the horizon? I thought LG was doing a stepped 1-7/8 at 32" but is there anything else?
Btw, my calculations come from the formulas found in A. Graham Bell’s Performance Tuning in Theory and Practice.
