Shorty headers
Pro
Joined: Oct 2004
Posts: 653
Likes: 10
From: Walton Kentucky
Can't help but try. I would hope that the manufacturer has some correct test data. I want to know if I would get 10hp or more.
I don't think I could feel 10hp increase but that is me. I find it hard to believe that they would invest all the R&D money for zero gain. Holley/Hooker have always been a reputable mfg. so let's see what they say!
I don't think I could feel 10hp increase but that is me. I find it hard to believe that they would invest all the R&D money for zero gain. Holley/Hooker have always been a reputable mfg. so let's see what they say!
Team Owner
Joined: Sep 2003
Posts: 25,295
Likes: 4
From: I'm the walkin dude I can see all of the world...
St. Jude Donor '03
Originally Posted by tvetta
Can't help but try. I would hope that the manufacturer has some correct test data. I want to know if I would get 10hp or more.
I don't think I could feel 10hp increase but that is me. I find it hard to believe that they would invest all the R&D money for zero gain. Holley/Hooker have always been a reputable mfg. so let's see what they say!
I don't think I could feel 10hp increase but that is me. I find it hard to believe that they would invest all the R&D money for zero gain. Holley/Hooker have always been a reputable mfg. so let's see what they say!
Good luck with the effort. I ran shorties on my car for a year. There is no/very minimal power gain. They look better than stock tho.
Melting Slicks
Joined: Dec 2004
Posts: 3,219
Likes: 1
From: Somerset Co, NJ
Good thread, I posted similar last month, same responses. I'm putting on a Borla system soon for my '92, and I was wondering if I should go to shorties while I'm at it, looked at JBA ceramic shorties, but 700+ dollars is making me lean to keeping my manifolds.I'll already be spending a grand on the Borla system! Also, Ive read that from L98 to the LT1 Chevy went back to exhaust manifolds from a header like arrangement, and that the exhaust manifolds are smoother inside, like ported heads, which have a better flow than any headers. I guess GM spent alot of $$ on R&D on why they chose the manifolds. I don't know....
Race Director
Joined: Feb 2003
Posts: 11,672
Likes: 20
From: Lake Wylie SC
Originally Posted by C4Jimmy
Good thread, I posted similar last month, same responses. I'm putting on a Borla system soon for my '92, and I was wondering if I should go to shorties while I'm at it, looked at JBA ceramic shorties, but 700+ dollars is making me lean to keeping my manifolds.I'll already be spending a grand on the Borla system! Also, Ive read that from L98 to the LT1 Chevy went back to exhaust manifolds from a header like arrangement, and that the exhaust manifolds are smoother inside, like ported heads, which have a better flow than any headers. I guess GM spent alot of $$ on R&D on why they chose the manifolds. I don't know....
Last edited by Strick; Jan 14, 2005 at 09:00 AM.
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Burning Brakes
Joined: Jul 2003
Posts: 922
Likes: 1
From: Brisbane Queensland, Australia
A lot of ppl that know; say one can actually lose a few HP when changing from std ex manifolds...I know most people will jump up and down about that, but do the research.
Astetically tho, I don't think many ppl would dissagree that nice looking headers are appealing.
Astetically tho, I don't think many ppl would dissagree that nice looking headers are appealing.
Race Director
Joined: Feb 2003
Posts: 11,672
Likes: 20
From: Lake Wylie SC
Originally Posted by smacko
A lot of ppl that know; say one can actually lose a few HP when changing from std ex manifolds...I know most people will jump up and down about that, but do the research.
Astetically tho, I don't think many ppl would dissagree that nice looking headers are appealing.
Astetically tho, I don't think many ppl would dissagree that nice looking headers are appealing.
Burning Brakes
Joined: Nov 2001
Posts: 920
Likes: 0
From: Cherry Hill NJ
But the flow is affected, which would cause that. Using 1 and 3/4 over 1 and 5/8 could possible account for that. Is there really a HP loss, or is the tourque just now maximized higher along the RPM band?
