Bryan Wilkinson

iTrader: (1)

I swapped from the LS6 to the LSX and there was no gain in HP across the entire RPM band from 1000 rpm to 6500 rpm

BlueSix

Any drop in boost from that swap?

KompreSSor

so on a stock engine, going from LS2 to LSX 90mm won't net you any HP?

CSiJason

I might be crazy, but it'd be awfull hard to make a cable throttle body work on a drive by wire car.

BlueSix

I'm pretty sure you can get a 90mm DBW throttle body...doesn't the LS2 GTO come with one standard?

CSiJason

Yes, which is why I was confused one would want to use an aftermarket unit on the Fast 90 intake on an LS2 anyhow?

Neumonic2002

well the truth of the matter is we still do not have a intake only swap from an LS2 to the fast! The other guy who showed the nice gains was low on HP for a H/C car before the intake swap.. just calling it like I see it!

CSiJason

I agree... Someone should go ahead and send me a free FAST 90 intake and the LS2 'bolt-on' kit and i'll do some stock to stock before and after dyno's and end this debate for good.

GTO_Scott

iTrader: (3)

You'll find the IRS 2004-2006 GTO will show lower rwhp and rwtq numbers than F-bodies.

Nate_Taufer

iTrader: (1)

Why dont you send your ls2 intake to be ported by lt1dave. Their ported ls2 and a ported FAST 90mm were within 5hp peak and pretty much identical curves. Plus it only costs like 150 bucks to have it ported.

Nate

KompreSSor

what does that mean?

BlueSix

GTO's will dyno lower than an f body with similar mods because the IRS of the GTO takes more horse power to turn than the solid axle of the f body.

LS2 V8 Miata

What planet are you guy operating on? Basic LS1 F-body stock cars typically post about 334 RWHP, Corvette numbers are rated at the flywheel. LS2 numbers are approximately (there are no absolutes in this universe) 400 HP and 400 Torque. Flywheel or Rear Wheels? SAE certified testing methodology? anybody? research it. Anybody that is telling you that their bolt on product is going to beat GM numbers with cats, factory exhaust manifolds and intake in place all meeting emmission standards should have to prove their claims before they get my money.

The fast throttle body is supposed to be a direct bolt on cable operated replacement for the OEM fly-by-wire 90 MM throttle body that has the IAC and TPS integrated. I have a FAST 90 MM on a 2006 Vette LS2 V8 it has problems the throttle plate is a poor fit in the CNC bore. In short it sucks.
UMI makes a much better product for significantly less cost, most important it works. I noticed Arizona Speed & Marine uses them too.

I have two FAST throttle bodies on the shelf, none are going on any more of my motors we are working with the fly-by-wire TB even in stand alone engine conversions.

Hope this helps!

BlueSix

Correction- your average LS1 f body will dyno ~300 rwhp (+/- 10 rwhp). LS2's are putting down roughly 350 rwhp.

And what is that directed to? I'm not sure what you're trying to get at here.

Snafu

iTrader: (1)

Well...in theory.

Our LS1's (2004 GTO's) tend to run a bit stronger than the f-body's LS1...don't forget ours come with LS6 block, LS6 intake manifold, different cam, LS2 timing chain, LS6 oil pump, etc.

A stock 2004 GTO will dyno in the 290-310 range. Simple tune will yield 10-20 more ponies.

I had a 2000 vette and this motor (when it was stock) felt alot stronger than my vette did.

LS24U

If this is true then the LS2 intake has earned a litlle bit of a bad rap for no reason...hmmmmmmmm

BlueSix

The '04 GTO LS1 is the same as evey other LS1 made from 2001 on.

1BDWS6

iTrader: (8)

The LS6 block is just stronger, it gives no more HP, the LS6 intake is the same intake that came on ANY 2001 LS1 and later, the different cam might give it a little more tourque on the bottom end because the GTO weighs more but gives it no more HP, the LS2 timing chain is just for durability it gives no more HP, and the LS6 oil pump is for reliability as well, again yeilding no more HP.

Just about any stock 2000 and later LS1 will dyno in that exact same range.

Firehawk0220

MY 2002 Firehawk dynoed about the same as any stock WS6 Trans-AM or SS Camaro did. Even though GM claimed it was 345HP. At the real wheels it wasn't alot stronger than a WS6 car.

Dukedoom

Nick at Newteck Performance showed that the LS2 intske was showing vaccuum wide open....the FAST 90 intake solved that problem. The Fast intake shows improved low end torque and better upper end horse power gains as well. The throttle response is much improved also. Right now I can be rolling allong at 25mph in first....mash it and instantly spin my tires like you would when you pull the trigger on a drill and let off and they stop as quick. AND that's with traction control "on" and it wasn't turned off in the tune.

Bottom line....get the Fast intake over the stock LS2 and you won't be dissappointed!!

The Duke