LS3 fast
http://forums.corvetteforum.com/show...2039807&page=2
Just like everything else we will have to wait a while longer.
Initially it might only be available for the cathedral port (LS2) style heads but shortly after we might see the rectangle port (L92/LS3) version released as well.




At SEMA, Craigster was told the FAST for the LS3 was on the dyno back in December and was coming out immediately. The rep at SEMA also said its gains were eclipsing the LS1 version's gains. 8 months later they arent even close.
And with that said; perhaps there is very little or no room for improvement over the OEM offering to justify bringing a product to market that for $600 plus is only going to net possibly 7 or 8 additional horsepower?
I'm a rookie and don't know, but thought I would toss that one out there for consideration.
I can't imagine a larger manufacturer like FAST sitting on their hands and letting potential aftermarket revenues go unfound.
Thoughts or opinions?
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I do still believe that there will be far more gains to be had though once the FAST 92 and the Weiand Street Warrior rectangle port versions are in full swing.
I do still believe that there will be far more gains to be had though once the FAST 92 and the Weiand Street Warrior rectangle port versions are in full swing.

Considering that the LS3 intake is likely an overall better flowing piece than the LS2 unit I would think that the comparitive gains might be slightly less. But then again those LS3 heads do flow and the cam is slightly bigger so we could still see the same benefits.
And I'm simply talking about a bolt on car, on a cammed/heads and cam LS3 I am almost positive that the gains will be substantial and make the swap totally worthwhile.
Considering that the LS3 intake is likely an overall better flowing piece than the LS2 unit I would think that the comparitive gains might be slightly less. But then again those LS3 heads do flow and the cam is slightly bigger so we could still see the same benefits.
And I'm simply talking about a bolt on car, on a cammed/heads and cam LS3 I am almost positive that the gains will be substantial and make the swap totally worthwhile.

If I had to guess; I think the gains from any aftermarket LS3 intake manifold are going to maybe 10 hp at best and not anything more than what Corey Harris is obtaining by porting the exisiting LS3 intake on the stock LS3 engine.
The stock cylinder heads on the LS3 flow really as good as they get right now.
In speaking with Spin; he advised that any port work to the existing LS3 heads or the purchase of any CNC ported LS3 heads on the LS3 motor was wasted money. Spin advised that the dyno numbers only reflected a net increase of 6 rwhp at the top of the RPM band and an actual loss of torque in the lower part of the RPM band.
If I understood Spin correctly; on the LS3 motor with the larger rectangular ports, larger valves, LS7 injectors, larger intake runners etc; the air flow was "about as good as it gets".
But I guess we will have to wait and see what kind of numbers any aftermarket intake manifold is going to generate for the LS3 motor with its already more aggressive cam profile, OEM intake manifold and OEM cylinder heads.
I think it goes without saying that for those that have an LS2; the best bang for the cheapest dollar for useable torque and top end rwhp gains is the OEM LS3 intake manifold and LS3 cylinder heads.
I just don't think that any aftermarket intake manifold for the LS3 engine is going to produce the same type of gains that were found on the FAST intake for the LS2, but time will eventually tell.
Last edited by C6LSx; Jul 14, 2008 at 11:53 PM.
Sooo... in the meantime, you can't go wrong with my ported L76's and LS3 intakes. I stock both for core exchange with zero downtime to keep you rolling all summer long. You can enjoy a great step up while you wait for the FAST or Weiand.
You could be making more power while everyone else just talks about it
Last edited by Cory@LS2PortWorks; Jul 15, 2008 at 08:23 AM.
Sooo... in the meantime, you can't go wrong with my ported L76's and LS3 intakes. I stock both for core exchange with zero downtime to keep you rolling all summer long. You can enjoy a great step up while you wait for the FAST or Weiand.
You could be making more power while everyone else just talks about it
These pictures don't do Cory's port job enough justice because my ported LS3 intake was a work of art!
Ported intake, MGW shifter, NPP with M2W, and LG Pro headers are all absolute must haves on any C6 I would own! The intake is one of the easiest mods you can do also.










and make do with the ported GM units for now.









