Fast92 vs ported LS6 advice?
Le Mans Master
Joined: Dec 2005
Posts: 8,475
Likes: 332
From: Port Arthur, Texas 77642
Lower ET's & higher dyno numbers are great but IMO the increased power under the curve while weekend cruising or roadcoursing is what the Corvette is all about. Ported Ls2 TB & ported FAST 92 FTW 
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Right but I usually dont give advice on things I dont or didnt own and in this situation you dont own either manifold he is asking about. You never ran either manifold he is asking about either so I dont get what makes your opinion informed.
I owned both and ran both on a C5 and ran ported stocker and a FAST on a C6. I lost count of how many customers ran stock ported manifolds and then my ported FAST on both C5's and C6's.
Yes you have the right to comment but people should file it in a suitable place.
I owned both and ran both on a C5 and ran ported stocker and a FAST on a C6. I lost count of how many customers ran stock ported manifolds and then my ported FAST on both C5's and C6's.
Yes you have the right to comment but people should file it in a suitable place.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
In fact, that very same link you gave shows that Tony Mamo said "I have sent a few ported FAST's to customers who literally had stock heads and a stock cam. While not fully taking advantage of the intakes I sent them, most still saw an additional 10-15 RWHP. Also, almost all of them knew that better heads and cam was in there future thereby unlocking the extra 10 or so HP they didnt see immediatly."
I already had a LS6 intake, so I avoided the core charge. Its $300 for the TPIS 90MM replacement surgery and another $200 for porting the manifold. We'll see. Good luck to you too.
I already had a LS6 intake, so I avoided the core charge. Its $300 for the TPIS 90MM replacement surgery and another $200 for porting the manifold. We'll see. Good luck to you too.
I speak with Tony Mamo on the phone from time to time and I am sure he meant peak HP/TQ numbers which is not at all what the FAST does under the curve. I will bring it up with him next time. Unlike any ported Stocker, the FAST's power under the curve is never indicated by its peak numbers. I have never seen a ported stocker make anything better than its peak numbers under the curve. Saying a FAST got 15 at peak and you got 11rwhp with a ported LS6 will not be a fair comparison because at 4500rpm, the difference will be more like 20rwtq over the ported LS6 and that is definitely worth the difference in the price.
Anyone wanting a ported LS6 or LS2, I get 9-11rwhp from them with my porting so for a 160 dollar investment, you can get 1/3 of the results of the FAST. The porting of stockers is less than 1/2 the work for me compared to a FAST prep, so I like that kind of sale too. PM for any details.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
The FAST doesnt lose TQ anywhere in the power band.
Not true that you lose tq so tell whoever said that to you that its 100% false.
So if you had some LS6 or LS2 unit and the gains were ONLY 9rwhp and 17rwtq better would it be worth it? Then look at the area under the curve and ask if gains of 25rwhp and 30rwtq in the midband are worth the difference.
The above dyno is the stock cam and stock heads with a FAST swapped onto it.
Last edited by SpinMonster; Mar 1, 2009 at 04:38 AM.
Safety Car
Joined: May 2005
Posts: 3,990
Likes: 1
From: Corpus Christi Texas
Here are the results of my ported stock intake vs stock FAST intake. Just to show that even though results may vary, the FAST shines stock and especially ported.
Here's stock vs ported stock intake.
Here's stock vs ported stock intake.
Safety Car
Joined: Aug 2006
Posts: 4,206
Likes: 6
From: Makena, Maui & NM
I saw the dyno comparison in another thread...its virtually the same.
Saw this also on the C5 forums:
My LS6 intake and TB were both pro ported on my H/C Z06. I swapped to a pro ported FAST 90 and LS2 setup. I only gained 5 peak hp and lost both torque and hp throughout the midrange. So if you want to save a lot of money and get more torque go with the LS6 combo. I got my LS6 TB ported by Lingenfelter for like $100, and the LS6 intake by LS2 portworks was around $160 I think. Can't go wrong considering the price.
P.S.
Call or email Lingenfelter's customer service dept. they'll give you the real scoop on this, and won't try to sell you an unnecessary component for your application; and yes they know what they're talking about.
P.S.
Call or email Lingenfelter's customer service dept. they'll give you the real scoop on this, and won't try to sell you an unnecessary component for your application; and yes they know what they're talking about.
Last edited by siffert; Mar 2, 2009 at 05:36 PM.
