Header primary size/intake Question
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Header primary size/intake Question
I am having a 383 build with a bottom end that will hold a 300 shot of Nitrous. I doubt I will see the 300 I am thinking of hitting it with 200 at the most. I have American Racing 1 3/4 primary headers that go to a 3" collector, connect ted to a 3"X2.5" X pipe. I am wondering if I should step up to 1 7/8 primaries?
I am also thinking of going to a aluminum intake manifold. I was looking at the Lingenfelter product. From what I have read, this intake has been engineered after the LS6 manifold with enough meet on the runners to port if needed. Has anyone here used it and how do you feel about it.
TIA
I am also thinking of going to a aluminum intake manifold. I was looking at the Lingenfelter product. From what I have read, this intake has been engineered after the LS6 manifold with enough meet on the runners to port if needed. Has anyone here used it and how do you feel about it.
TIA
Thread Starter
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Tech Contributor
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
I find it hard to beat the flow of a PLASTIC FAST intake. I ported my own FAST 90 and 90 mm TB and it easily supports my heads/cam 450 RWHP output.
That aluminum manifold looks like it would be a great heat sync!!
Whats driving you toward an ALUMINUM Manifold?? Have you compared actual flow numbers between the Fast 90/92 & 102 to that intake manifold?
As for the up-grade in header runner size,, I would contact Nick at ARH and discuss your concerns. He has extensive flow and performance knowledge of his product!!!
Another excellent reference would be Tony Mamo. He has done EXTENSIVE RESEARCH in that area. He can answer a LOT of questions like the ones that your asking. Shoot him a PM..
I'm running a COMPLETE Stainless Works 1 3/4 primary Header and exhaust
system and the entire thing is a 3" System form collector to muffler outlet. It performs and sounds OUTSTANDING!
BC
That aluminum manifold looks like it would be a great heat sync!!
Whats driving you toward an ALUMINUM Manifold?? Have you compared actual flow numbers between the Fast 90/92 & 102 to that intake manifold?
As for the up-grade in header runner size,, I would contact Nick at ARH and discuss your concerns. He has extensive flow and performance knowledge of his product!!!
Another excellent reference would be Tony Mamo. He has done EXTENSIVE RESEARCH in that area. He can answer a LOT of questions like the ones that your asking. Shoot him a PM..
I'm running a COMPLETE Stainless Works 1 3/4 primary Header and exhaust
system and the entire thing is a 3" System form collector to muffler outlet. It performs and sounds OUTSTANDING!
BC
Last edited by Bill Curlee; Nov 12, 2011 at 10:08 AM.
Thread Starter
Race Director
Joined: Jun 2009
Posts: 12,331
Likes: 139
I find it hard to beat the flow of a PLASTIC FAST intake. I ported my own FAST 90 and 90 mm TB and it easily supports my heads/cam 450 RWHP output.
That aluminum manifold looks like it would be a great heat sync!!
Whats driving you toward an ALUMINUM Manifold?? Have you compared actual flow numbers between the Fast 90/92 & 102 to that intake manifold?
As for the up-grade in header runner size,, I would contact Nick at ARH and discuss your concerns. He has extensive flow and performance knowledge of his product!!!
Another excellent reference would be Tony Mamo. He has done EXTENSIVE RESEARCH in that area. He can answer a LOT of questions like the ones that your asking. Shoot him a PM..
I'm running a COMPLETE Stainless Works 1 3/4 primary Header and exhaust
system and the entire thing is a 3" System form collector to muffler outlet. It performs and sounds OUTSTANDING!
BC
That aluminum manifold looks like it would be a great heat sync!!
Whats driving you toward an ALUMINUM Manifold?? Have you compared actual flow numbers between the Fast 90/92 & 102 to that intake manifold?
As for the up-grade in header runner size,, I would contact Nick at ARH and discuss your concerns. He has extensive flow and performance knowledge of his product!!!
Another excellent reference would be Tony Mamo. He has done EXTENSIVE RESEARCH in that area. He can answer a LOT of questions like the ones that your asking. Shoot him a PM..
I'm running a COMPLETE Stainless Works 1 3/4 primary Header and exhaust
system and the entire thing is a 3" System form collector to muffler outlet. It performs and sounds OUTSTANDING!
BC
The heat sync issue I have yet to find a definitive argument either way on that. There are many folks who will argue each side of the point and some of the fastest cars I have ever encountered have a sheet metal intake. As for flow I have researched and even a ported FAST seems to lop off at 280 CFMs and I am flowing 297cfm's at .500 lift on my heads. The last cam Ed Curtis did for me had a 615 lift, in and out with the same heads and it made pretty good HP 540 rwhp with a 150 shot, through an A4 but I thought I was leaving something on the table. Full weight, with street tires, I ran an 11.1@124.
Thats the main reason I want anyone who has had experience with a Weiand/Lingenfelter manifold's opinion. I know a lot of people have been sold on the FAST hell even I, it is a great product, but all the people I know who do a big shots of N2O have a metal intake and they seem to be happy, but again they are track only cars not DD. Mine is a semi DD, most driving gets done in the winter because I live in AZ and the weather is great for DD and track.
