Summit Headers for '77 w/406?
Thread Starter
Pro
Joined: Feb 2006
Posts: 649
Likes: 10
From: Shelby Twp MI
Summit Headers for '77 w/406?
I am reaplacing my hooker Super comp side pipes. Too risky for the little ones. I know it seems like downsizing, but is it actually?
The summit headers compared to hooker Super comp standard headers Have 1-5/8 vs 1-3/4 tubes respectively and the summit ones are also not tuned.
Anyone have advice and experience with these? Theyre also $140 vs $500 too!
The summit headers compared to hooker Super comp standard headers Have 1-5/8 vs 1-3/4 tubes respectively and the summit ones are also not tuned.
Anyone have advice and experience with these? Theyre also $140 vs $500 too!
Le Mans Master
Joined: Jun 2003
Posts: 5,135
Likes: 71
From: Umeå Sweden
Look at the show engine masters on YouTube they tried different size headers on a 550 hp 400sb, the difference was about 10 hp on 1 5/8 vs 1 3/4
Last edited by stingraymaniac; Aug 6, 2017 at 04:18 AM.
Melting Slicks
Joined: Mar 2008
Posts: 2,989
Likes: 198
From: Meriden CT
I am reaplacing my hooker Super comp side pipes. Too risky for the little ones. I know it seems like downsizing, but is it actually?
The summit headers compared to hooker Super comp standard headers Have 1-5/8 vs 1-3/4 tubes respectively and the summit ones are also not tuned.
Anyone have advice and experience with these? Theyre also $140 vs $500 too!
The summit headers compared to hooker Super comp standard headers Have 1-5/8 vs 1-3/4 tubes respectively and the summit ones are also not tuned.
Anyone have advice and experience with these? Theyre also $140 vs $500 too!
Thread Starter
Pro
Joined: Feb 2006
Posts: 649
Likes: 10
From: Shelby Twp MI
Thanks everybody.
It is a 406 4-bolt with AFR 195 heads, RPM airgap intake and 770 Avenger Carb. Cam is a smaller .480 lift but I have 1.6 roller rockers.
Also, could use some advice on mufflers out the back... Thoughts?
It is a 406 4-bolt with AFR 195 heads, RPM airgap intake and 770 Avenger Carb. Cam is a smaller .480 lift but I have 1.6 roller rockers.
Also, could use some advice on mufflers out the back... Thoughts?
Le Mans Master
Joined: Apr 2001
Posts: 5,436
Likes: 1,253
From: Sarver Pa
2021 C1 of the Year Finalist - Modified
That was a great video. Now you have to decide how often you visit 6500 rpm and is the extra 10 hp worth the extra money. I've got a 355 in mine now and am building a 406 to do some drag racing so I will be switching headers also. Pretty much as I suspected.
Thread Starter
Pro
Joined: Feb 2006
Posts: 649
Likes: 10
From: Shelby Twp MI
So I found a set of ceramic coated hooker Super comp headers. They are new, never used but selling at a discount because the have a penny size ding in one of the tubes. After watching all the videos, seems like the 1-3/4 is the sweet spot for header tube sizing on a 400. Also, in some of the other videos, it didn't appear the dings made an impact until they were dented "a lot"- Almost half. Performance actually got a bit better on their 350 when they did a minor ding. Lol.
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