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 $$ on R&D on why they chose the manifolds. I don't know....
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
Originally Posted by C4Jimmy
Good thread, I posted similar last month, same responses. I'm putting on a Borla system soon for my '92, and I was wondering if I should go to shorties while I'm at it, looked at JBA ceramic shorties, but 700+ dollars is making me lean to keeping my manifolds.I'll already be spending a grand on the Borla system! Also, Ive read that from L98 to the LT1 Chevy went back to exhaust manifolds from a header like arrangement, and that the exhaust manifolds are smoother inside, like ported heads, which have a better flow than any headers. I guess GM spent alot of $$ on R&D on why they chose the manifolds. I don't know....
Last edited by Strick; Jan 14, 2005 at 09:00 AM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
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: 11,671
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?
