Results after adding Pfadt headers
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Pro
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Wow. So if I compare your two dyno runs, it shows that just the headers give you 100 lb-ft more torque at 4000rpm (this, of course is not to be expected on less-modded cars). That's what I was hoping to see. The tri-Y design is a winner across the rpm band.
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I wish there was a way to test a 'standard' header against it on the same supercharged setup to see what the difference was. Those gains are huge.
I'm wondering how much I'm giving up with my 1.875" OBX setup now.
I'm wondering how much I'm giving up with my 1.875" OBX setup now.
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From: Providing the most proven supercharger kits for your C5/6/7 609-752-0321
In all fairness, when the car had stock manifolds/cats, I have to run slightly lower timing for the higher back pressure. Regardless though it still picked up significantly.
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I added a set of Pfadt headers with cats to our 10GS. I drove it down to have Doug do the retune. I had stock manifolds and cats. The cats were starting to fall apart so I figured I might as well get headers since the gutted cats sounded like azz..
The mods were:
ECS blower Kit
ECS Meth kit
Factory ZR-1 cam
Z06 fuel pump w/bap
I was at 680rwhp/639rwtq. All I added were the Pfadt headers and the retune. The car now has: 732rwhp/699rwtq. I gained 52rwhp/60rwtq. The car still drives like stock, and you can't hear the headers on the highway. (screams on the dyno!!) Put about 350 miles on the car today.
Unfortunately the last time at the track before the headers the car only went high 10's. Found out my 4 year old belt was slipping and it had torque management still somewhat on. So Tommy threw on a new belt after the first dyno run today. Can't wait to get to the next rental to see if it will go 9's
Thanks again ECS
The mods were:
ECS blower Kit
ECS Meth kit
Factory ZR-1 cam
Z06 fuel pump w/bap
I was at 680rwhp/639rwtq. All I added were the Pfadt headers and the retune. The car now has: 732rwhp/699rwtq. I gained 52rwhp/60rwtq. The car still drives like stock, and you can't hear the headers on the highway. (screams on the dyno!!) Put about 350 miles on the car today.
Unfortunately the last time at the track before the headers the car only went high 10's. Found out my 4 year old belt was slipping and it had torque management still somewhat on. So Tommy threw on a new belt after the first dyno run today. Can't wait to get to the next rental to see if it will go 9's
Thanks again ECS
Glad we could help and get you a ridiculous amount of HP/TQ gains. Love that 4k RPM bump!
Thread Starter
Le Mans Master
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From: WilkesBarre PA
Premium Supporting Vendor
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From: Providing the most proven supercharger kits for your C5/6/7 609-752-0321
Thread Starter
Le Mans Master
Joined: Aug 1999
Posts: 7,339
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From: WilkesBarre PA
Melting Slicks
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From: Santa Barbara CA
