TPIS Headers
Thread Starter
Melting Slicks
Joined: Mar 2001
Posts: 3,251
Likes: 48
From: Parkland Florida
Corvette Challenge Champ-01
Dragster Challenge Champ-06
TPIS Headers
I'm thinking about buying a set of TPIS headers for my 1985 L-98 coupe. What I need to know is what is the size of the primary tubes? Are they 1 5/8" which is what I want for my L-98 or are they 1 3/4" which would absolutely kill all my low end torque. Any one know?
Le Mans Master
Joined: Jan 2002
Posts: 5,320
Likes: 4
From: Kyle TX (Because Mojo Made me fill it in)
Re: TPIS Headers (Turbo Bob)
Forget all the stories you have heard about losing TQ with the larger headers. You wont. I have the 1 3/4" TPIS headers and lost no TQ. Actually I gained some across the board.
http://forums.corvetteforum.com/zerothread?id=470176
[Modified by VetteNoob, 4:59 PM 3/10/2003]
http://forums.corvetteforum.com/zerothread?id=470176
[Modified by VetteNoob, 4:59 PM 3/10/2003]
Melting Slicks
Joined: Oct 2000
Posts: 3,426
Likes: 4
From: Heidelberg PA
Cruise-In V Veteran
Re: TPIS Headers (Turbo Bob)
I am not positive what the measurements are, but I do have a set on my car. If I lost any torque, I sure could not tell, since it improved my times at the track. The engine revs higher and I have less resonance compared to before installing them.
Do a search in archives, this issue has come up many times and there is some great info on these headers.
Do a search in archives, this issue has come up many times and there is some great info on these headers.
Drifting
Joined: Aug 2001
Posts: 1,550
Likes: 27
From: Minneapolis MN
Re: TPIS Headers (Turbo Bob)
TPIS only makes 1 3/4" headers. I think I'm going to go with these on my mainly stock L98, as most people have been happy w/them...plus they'll benefit any future mods.
Check this out: http://forums.corvetteforum.com/zerothread?id=509518
Check this out: http://forums.corvetteforum.com/zerothread?id=509518
Team Owner
Joined: Sep 2001
Posts: 62,139
Likes: 1,728
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: TPIS Headers (85vet)
its unlikely that any set of headers will kill all your low-end torque, but 1.75" on a stock engine may cost you a couple ft-lbs at WORST, though its unlikely that youll notice it at all
but anything you lose down low, you get back in midrange and top end
but anything you lose down low, you get back in midrange and top end
Le Mans Master
Joined: Sep 2000
Posts: 6,303
Likes: 714
From: Bartlett IL
Re: TPIS Headers (Greg Johnson)
Have them on my Xfire.If anything, they fattened up the torque curve. Excellent header to build te rest of your mods around. They're sleepers too. With all the standard bracketing and bolts, you'll do a double take to notice they're headers. CAVEAT: They're built for ANGLE PLUG HEADS.
Elite Torch Red Member
Joined: Sep 1999
Posts: 57,805
Likes: 23
From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
Re: TPIS Headers (Turbo Bob)
Hey Bob! :seeya See you at the track Saturday.
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