Ported LS2 manifold?
Thread Starter
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08
Ported LS2 manifold?
Have any of you guys or shops ever used a ported LS2 intake manifold that held up well under boost? Getting a FAST is out of the question and I am just looking for ways to help my car breathe a little better and be more efficient.
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
FWIW, I took my ported FAST off when I did my A&A blower and had no problems making over 600rwhp on a 3.8 pulley with a stock motor. I saw so many people making huge numbers on a stock intake I didn't see the benefit.
Why not spend the money for a smaller pulley or meth?
Why not spend the money for a smaller pulley or meth?
Thread Starter
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08
FWIW, I took my ported FAST off when I did my A&A blower and had no problems making over 600rwhp on a 3.8 pulley with a stock motor. I saw so many people making huge numbers on a stock intake I didn't see the benefit.
Why not spend the money for a smaller pulley or meth?
Why not spend the money for a smaller pulley or meth?
It's a TT car.Here's my logic:
I want to make the most amount of reliable power without boosting the car through the moon. I'm still using stock heads (with ARP 2000 head studs) and APS journal bearing turbos. Both of these would last longer and be more reliable if I helped make the engine more efficient and didn't spin the turbos to the edge of destruction.
They claim 15-20rwhp in a NA car with a "stage II" ported LS2 manifold. I would think at 15-16psi of boost, I would even see better results. Yes? No? If the power gained would be worth the $2-300, I'd probably do it.
Thread Starter
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
You know my previous setup had a LS2 intake on a 403 and what power I made.
You know what I make now with a 434 and a Vic. Jr.
I think you'll have a known-good intake with no troubles under boost.
You know what I make now with a 434 and a Vic. Jr.
I think you'll have a known-good intake with no troubles under boost.
Thread Starter
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08
I think I've addressed as much of a backpressure issue as possible. IAT's could prob decrease with E85, as that has been a goal of mine.
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Drifting
Joined: Feb 2006
Posts: 1,585
Likes: 15
From: New Hartford IA
I wouldn't cut the supports inside the plenum for porting though. I'd think the flat bottom would flex without the extra support nder high boost pressure. I'd just do light cleanup where the tb bolts to the intake and around the runners as deep as I could reach. I wouldn't expect to set the world on fire doing this, but every little thing adds up, well most of the time 
Race Director
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From: Out Where the Buses Don't Run, Eglin AFB/ Niceville FL
2025 C8 Z06/7/E-Ray of the Year Finalist - Unmodified
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I've been running FI on a stock ported manifold for a little over two years now with no issues.
Banned Scam/Spammer
Joined: Oct 2010
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From: West Bloomfield MI
I'm sure a ported LS2 90mm TB and intake help, but for hundreds of dollars I can't see the point. Even if you gain 15-20 hp. So what. That doesn't justify hundreds of dollars in hardware + another $500 for tuning IMO. For competitive racers where a tenth means something then maybe, but for everyone else it's a waste.
From my perspective any mods that don't net at least 40-50 hp aren't worthwhile. Just my .02.
From my perspective any mods that don't net at least 40-50 hp aren't worthwhile. Just my .02.
