Has anyone read the latest Chevy Performance header article?
Thread Starter
Racer
Joined: Sep 2003
Posts: 260
Likes: 0
From: Indianapolis IN
Has anyone read the latest Chevy Performance header article?
They took a 383 and dynoed 1-1/2" to 1-7/8" headers. It seemed that the 1-1/2" Shortie headers really surprised them. The 1-5/8" Longtubes weren't even even close to the 1-1/2" for a street car. What's your guys take??
Drifting
Joined: Jul 2002
Posts: 1,488
Likes: 4
From: Frostburg MD
Re: Has anyone read the latest Chevy Performance header article? (HC4-Vette)
I read the article too, it seemed they were inconclusive as to why the results were the way they were. A different engine than what they had would probably have different results.
Race Director
Joined: Feb 2001
Posts: 13,911
Likes: 101
From: Manassas VA
NoVa Events Coordinator
St. Jude Donor '14
Re: Has anyone read the latest Chevy Performance header article? (HC4-Vette)
They took a 383 and dynoed 1-1/2" to 1-7/8" headers. It seemed that the 1-1/2" Shortie headers really surprised them. The 1-5/8" Longtubes weren't even even close to the 1-1/2" for a street car. What's your guys take??
[Modified by Bluewasp, 2:47 PM 2/9/2004]
Racer
Joined: Oct 2002
Posts: 416
Likes: 2
From: Westfield MA
Re: Has anyone read the latest Chevy Performance header article? (HC4-Vette)
It was an interesting article. I asked in a post yesterday if anyone had read it also. I didn't get any responses --------- maybe the April issue hasn't been out long enough. I also read a good article on another web site about "header flange restricter plates" that improve performance in lower rpm street engines.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Re: Has anyone read the latest Chevy Performance header article? (HC4-Vette)
Yep! I read it. It almost could have been written without the headers, engine, or dyno. It was pretty predictable. It would have been even more telling, if they had got a hold of a set of 1 1/2" long tubes.
RACE ON!!!
RACE ON!!!
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Re: Has anyone read the latest Chevy Performance header article? (STL94LT1)
Long story short. An engine should end up with parts coordinated for a specific purpose. Just like heads, cam, intake manifold, etc, the biggest headers aren't necessarily the best choice. Bigger ian't always better.
RACE ON!!!
RACE ON!!!
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Thread Starter
Racer
Joined: Sep 2003
Posts: 260
Likes: 0
From: Indianapolis IN
Re: Has anyone read the latest Chevy Performance header article? (CFI-EFI)
Yep! I read it. It almost could have been written without the headers, engine, or dyno. It was pretty predictable. It would have been even more telling, if they had got a hold of a set of 1 1/2" long tubes.
RACE ON!!!
RACE ON!!!
[Modified by HC4-Vette, 8:40 AM 2/10/2004]
