Headers 1 5/8 vs 1 3/4 tubes
Thread Starter
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Headers 1 5/8 vs 1 3/4 tubes
I posted this in the C3 section and got some info. Anybody here care to comment on this also.
http://forums.corvetteforum.com/show...5&forum_id=119
http://forums.corvetteforum.com/show...5&forum_id=119
Melting Slicks
Joined: Oct 2002
Posts: 3,193
Likes: 1
From: Cincinnati Oh
Originally Posted by CFI-EFI
This subject has been beat to death in the C4 section. I suggest you do a search. There has been a lot of blood let in those threads, and I'd prefer not to start over.
RACE ON!!!
RACE ON!!!
The first mental image I see whenever I read a "Header size" thread is CFI-EFI folding his arms and shaking his head - a la "Mr. T."
I pity the fool!
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
Likes: 71
From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by Ramanstud
The first mental image I see whenever I read a "Header size" thread is CFI-EFI folding his arms and shaking his head - a la "Mr. T."
I pity the fool!
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
The sky is the limit on exh manifolding mods.
Originally Posted by Gordonm
I posted this in the C3 section and got some info. Anybody here care to comment on this also.
http://forums.corvetteforum.com/show...5&forum_id=119
http://forums.corvetteforum.com/show...5&forum_id=119
He only mentions 1&3/4" for > 375hp but no mention on the hp/rpm/c.i. limit of a 1&5/8" hdr manifold.Other improvements are anti-reversion doubled tubes (Walker i think used to sell) & port dams, cross-over tubes, large dia exh pipes, press-wave termination boxes, and of course low press mufflers. Also, Smokey said to locate a low press area under car for exh to exit using a sensitive enough gauge.
So really only u can choose here where ur $$$ will be best spent. As much as u like to compete, go with the 1&3/4".
Let me know if u need those numbers.
cardo0
Thread Starter
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
I looked at a bunch of books from various engine builders. For a 383 making anything over 450 the 1 3/4 tube is highly recomended. I went ahead and ordered a set this past week. Already sold the 1 5/8 headers so I'm commited now.
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Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Then u need to read it again.
Originally Posted by ZD75blue
Cardo:
How do you go about finding this "low pressure" spot under the car? I dont recall reading about that in power secrets.
How do you go about finding this "low pressure" spot under the car? I dont recall reading about that in power secrets.
cardo0
