FAST intake question
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Melting Slicks
Joined: Jun 2000
Posts: 2,161
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From: Knoxville TN
FAST intake question
I am installing ported LS6 heads + a 222/228 114 cam on a LS1, I already have an LS6 intake, portaed TB, and LT headers, should I add the FAST 78 mm intake? What gains do you think I will see form this? (I was told by the shop the 90MM TB is overkill and will hurt my low end)
Thanks
Thanks
Safety Car
Joined: Sep 2003
Posts: 3,558
Likes: 2
From: Cape Coral FL
Originally Posted by 3rdtoy
I am installing ported LS6 heads + a 222/228 114 cam on a LS1, I already have an LS6 intake, portaed TB, and LT headers, should I add the FAST 78 mm intake? What gains do you think I will see form this? (I was told by the shop the 90MM TB is overkill and will hurt my low end)
Thanks
Thanks
Another example was a friend of mine with a 2002 Z06 went with a custom cam only and FAST 78 went from 354 rwhp to to 428rwhp. It only cost him a little less than half what my setup cost (for the intake) and I'll bet he picked up ~20rwhp.
Melting Slicks
Joined: Dec 2004
Posts: 3,160
Likes: 7
From: Chandler Az
Originally Posted by 3rdtoy
I am installing ported LS6 heads + a 222/228 114 cam on a LS1, I already have an LS6 intake, portaed TB, and LT headers, should I add the FAST 78 mm intake? What gains do you think I will see form this? (I was told by the shop the 90MM TB is overkill and will hurt my low end)
Thanks
Thanks
R
Burning Brakes
Joined: May 2002
Posts: 818
Likes: 0
From: The Nether Region IL
Originally Posted by 3rdtoy
I am installing ported LS6 heads + a 222/228 114 cam on a LS1, I already have an LS6 intake, portaed TB, and LT headers, should I add the FAST 78 mm intake? What gains do you think I will see form this? (I was told by the shop the 90MM TB is overkill and will hurt my low end)
Thanks
Thanks
I don't think the 78 is really worth the effort or the costs.
Last edited by bandit_99; Jul 26, 2006 at 11:19 AM.
Vettaholic
Joined: Jun 2006
Posts: 183
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From: Wherever I drive my vette
I really dunno and this is the subject of much debate right now - I mean, I plan to do AFR and a mild cam in the short term future, would a FAST bring any sizeable benefit in 78 or 90 ? I tend to think that with a mild cam the 78 would be better whilst a larger cam would take advantage of the larger bore. As Arkay99 said, it depends on how coherent the whole setup is.
Burning Brakes
Joined: May 2002
Posts: 818
Likes: 0
From: The Nether Region IL
Originally Posted by BlueThunder2000
I really dunno and this is the subject of much debate right now - I mean, I plan to do AFR and a mild cam in the short term future, would a FAST bring any sizeable benefit in 78 or 90 ? I tend to think that with a mild cam the 78 would be better whilst a larger cam would take advantage of the larger bore. As Arkay99 said, it depends on how coherent the whole setup is.
Originally Posted by Tony Mamo @ AFR
FAST 78 out of the box with a bone stock 78 mm TB worth approx. 6-8 RWHP
A well shaped epoxied stock TB worth another 3-4 RWHP on that same intake.
An unported FAST 90 set-up worth an additional 3-4 over the PORTED 78 set-up.
Tack on another 5-10 RWHP for ported (correctly) 90 mm package for the ultimate results and of course the most greenbacks spent....no surprise there. What's interesting is the gains are very similar whether you are talking about a combination that puts down 375 RWHP or 475 RWHP, but as you start stepping up from there the ported FAST 90 set-up could show you even more....airflow is at a premium once your approaching 600 flywheel HP (over 500 to the tires) and the manifold starts to become a larger and larger restriction.
Tony M.
PS....To better more directly answer your original question, a 90 mm set-up will be worth an additional 3-4 ponies over the same set-up with a ported 78 mm TB. Considering the 90 mm aftermarket TB's have come down a little in price, I would tell you just to step up and go with the 90....if you already have a Shaner or another well executed 78 mm TB, you may deem the extra 3-4 HP a 90 mm set-up could provide not worth it from a HP per dollar scenario....although while $125 per pony isn't cheap, its not a ludicrous amount to spend once you have hit all the other details (much like an EWP.....$500 gets you 5 extra ponies). Not to mention you could sell your ported 78 TB which now cuts the HP per dollar in half and IMO now makes the decision to step into a 90 a no-brainer. To summarize...buy the 90 :jest:
A well shaped epoxied stock TB worth another 3-4 RWHP on that same intake.
An unported FAST 90 set-up worth an additional 3-4 over the PORTED 78 set-up.
Tack on another 5-10 RWHP for ported (correctly) 90 mm package for the ultimate results and of course the most greenbacks spent....no surprise there. What's interesting is the gains are very similar whether you are talking about a combination that puts down 375 RWHP or 475 RWHP, but as you start stepping up from there the ported FAST 90 set-up could show you even more....airflow is at a premium once your approaching 600 flywheel HP (over 500 to the tires) and the manifold starts to become a larger and larger restriction.
Tony M.
PS....To better more directly answer your original question, a 90 mm set-up will be worth an additional 3-4 ponies over the same set-up with a ported 78 mm TB. Considering the 90 mm aftermarket TB's have come down a little in price, I would tell you just to step up and go with the 90....if you already have a Shaner or another well executed 78 mm TB, you may deem the extra 3-4 HP a 90 mm set-up could provide not worth it from a HP per dollar scenario....although while $125 per pony isn't cheap, its not a ludicrous amount to spend once you have hit all the other details (much like an EWP.....$500 gets you 5 extra ponies). Not to mention you could sell your ported 78 TB which now cuts the HP per dollar in half and IMO now makes the decision to step into a 90 a no-brainer. To summarize...buy the 90 :jest:
