1971 LT1 Header ?
Thread Starter
Instructor
Joined: Aug 2011
Posts: 131
Likes: 9
1971 LT1 Header ?
I have a 71 LT1 4spd
All is stock, except I did put on magnaflo exhaust
I want to put on headers
Question is
Which one's?
Will it be to loud?
(I do want to be able to carry on a conversation when driving)
I want soemthing that is a easy bolt on
How much additional horse will I get?
Your help is always appreciated
All is stock, except I did put on magnaflo exhaust
I want to put on headers
Question is
Which one's?
Will it be to loud?
(I do want to be able to carry on a conversation when driving)
I want soemthing that is a easy bolt on
How much additional horse will I get?
Your help is always appreciated
Burning Brakes
Joined: Mar 2005
Posts: 1,231
Likes: 34
From: Ontario
I have a 71 LT1 4spd
All is stock, except I did put on magnaflo exhaust
I want to put on headers
Question is
Which one's?
Will it be to loud?
(I do want to be able to carry on a conversation when driving)
I want soemthing that is a easy bolt on
How much additional horse will I get?
Your help is always appreciated
All is stock, except I did put on magnaflo exhaust
I want to put on headers
Question is
Which one's?
Will it be to loud?
(I do want to be able to carry on a conversation when driving)
I want soemthing that is a easy bolt on
How much additional horse will I get?
Your help is always appreciated
Which ones? Buy the best you can
Will it be too loud? Shouldn't be any louder than it already is
Additional HP ? Probably not notcible
Bill
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Speaking to power - with your existing free-flowing exhaust I'd offer that you will have a power increase that's noticeable, especially on an engine like the LT-1 that is definitely held back by the stock manifolds.
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
I haven't put on a set of C3 headers in quite a while - so I'd suggest a little searching here. All headers have their fit issues; I've generally found over the years that Hookers generally fit pretty well...but again, search is your friend 
As for power, a little more information - the LT-1 is bone stock? Is there a crossover tube?
Generally, I'd expect to see 20 or even 30 FWHP from long-tube headers with a free-flowing exhaust given the configuration...once the engine's tuned to match.
As for power, a little more information - the LT-1 is bone stock? Is there a crossover tube?
Generally, I'd expect to see 20 or even 30 FWHP from long-tube headers with a free-flowing exhaust given the configuration...once the engine's tuned to match.
Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
I have been rec. Dynomax full length headers which flow & fit great. Many have them now. Flowtech is now selling them.
There is a less exp. model Blackjack also sold by Summit.
Hooker aren't what they used to be.
http://forums.corvetteforum.com/1574392555-post11.html
http://forums.corvetteforum.com/c3-t...t-quality.html
There is a less exp. model Blackjack also sold by Summit.
Hooker aren't what they used to be.
http://forums.corvetteforum.com/1574392555-post11.html
http://forums.corvetteforum.com/c3-t...t-quality.html
Last edited by Ganey; Oct 31, 2011 at 04:19 PM. Reason: Add link
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Drifting
Joined: Oct 2007
Posts: 1,254
Likes: 5
From: Brown Summit North Carolina
You will also need to find a way to mount the Alternator, since it attaches to the front of the OEM exhaust manifold.
As for sound or loud, that is controled by the muffler not the manifold.
David
As for sound or loud, that is controled by the muffler not the manifold.
David
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
You will see an increase of around 25hp and 30-35ft/lbs of torque if my previous dyno testing is anything to go by.
