same here! guess a Cam is in order now to keep the gxp's at bayOriginally Posted by Mike P
Wow, those are some really good numbers. There is no way I could have waited for a GXP, but now I want one!
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same here! guess a Cam is in order now to keep the gxp's at bayWow, those are some really good numbers. There is no way I could have waited for a GXP, but now I want one!
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-= R.I.P Charlie =-2008 Panther Black G8 GT 888 Edition #470
Texas-Speed 418 LS3, Patrick G 234/242 114LSA+2 Cam & Livernois Ported Heads & Valve-job, Roto-Fab CAI & Radiator Cover, Fasterproms Ported TB & Manifold, ECM/TCM Tune by PatrickG, 1-7/8" American Racing Headers, Circle-D 258mm 2800rpm Converter, Powerbond 25% Pulley, Pedders xA Street II Kit, HSV VE GTS Fenders, HSV VE GTS 20" Wheels (285/30 & 245/35), 20% Tint, Holden Rear Sunshade, Empty Wallet Mod(tm)
http://g8gt.blogspot.com
Me too!!!!
SOLD: 2009 Maverick Silver G8 GXP M6
Current Vehicle: 1984 Chevy K10 (it's red and redneck)
New Vehicle: 1972 2wd K5 Blazer. It's being built right now. Link to the build is HERE
You cannot strengthen the weak by weakening the strong. You cannot help the wage earner by pulling down the wage payer. You cannot help the poor by destroying the rich. You cannot help men permanently by doing for them what they could and should do for themselves.
- John Henry Boetcker
same here! guess a Cam is in order now to keep the gxp's at bay
Yep, definitely!
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2009 White Hot G8 GT (stock)
* SOLD * 222/230 .597/.600 114+4 EPS Cam, Patrick G ECM/TCM Tune, Roto-Fab CAI, HSRK, Yank 3200 Torque Converter,
Transmission Cooler, Kooks 1 3/4" LT Headers, high flow cats, stock mufflers, Billet Prototypes Catch Can, UD Pulley,
Ported Intake Manifold, Spohn Trailing Arms
407 RWHP & 365 RWTQ
Best Time: 12.517 @ 115.02mph w/ 1.97 60' time - (on stock 18" AS Tires)
Dyno numbers are nice and all but can be misleading. Lets see some track times, and I don't want to hear any excuses about not being a good shifter out of anyone.
2009 Liquid Red G8Gt- Vector, Vararam, Stainless Works
447 rwhp / 411 rwtq , Mustang Dyno
Big thanks to that Crazy Paul guy!
2013 SHO, Livernois tune, airraid, h&r springs, SW downpipes/catback
2003 Saleen Mustang Vert'
2006 Jeep Srt-8
So 70HP over a GT? And another 20 or so if it is tuned. WOW!
That more than the intake/tune most thought was needed to keep up with the GXP.
Wow, I am quite impressed. Looks like the money spent on a GXP is well worth it then. I was kind of on the fence, but those are some bad ass stock numbers. Definitely better than I thought.
Looks like it'll take a lot more power to bring a stock GT up to a base GXP!
2008 Liquid Red G8 GT - RotoFab CAI, Pace Setter long tube headers, X-Pipe, Cincy Speed dyno tune. 355 rwhp/370 lbs ft torque.
30% Tint, V8 6.0 Litre badges, Pontiac lettering debadge on the trunk
I agree with this. One thing people forget is that the GT with the auto tranny does not have a true 1:1 4th gear (M6 4th is 1:1) and when you dyno in 4th you are really at 1:1.15. I believe that this "hurts" the dyno numbers of the GT. GTPprix tested an auto GXP and got 355 rwhp STD correction which would be in the mid to upper 340s rwhp using the SAE correction factor. Those results are more in line with what you would expect for a 54hp engine increase from the GT to the GXP. I think we are going to have to remember this when we compare dyno numbers from the GT and auto GXP with the M6 GXP as it is really not an equal comparison. If the gearing was equal the auto will usually have a litte more loss than the M6 but it is not as much as the dyno is telling us with the different gears. The extra loss is due to difference in the gearing causing a different measurement method.
Last edited by racerns; 02-12-2009 at 06:44 AM.
Neil
'08 MGM G8 GT New Era CAI, ARH LT, CAM Tune
12.59@109.6 MPH 1.89 60' Quickest Bolt-on G8?
'94 396 LT-4 GS Camaro
Just wondering, but has anyone thought about taking into consideration the octane requisite of the 2 models? Since the GXP is already tuned for 93 (at least as far I know) it shouldn't have as dramatic of an increase from tuning as the GT. After all, the primary reason the GT benefits so much from the tuning is the amount of timing that can be added once you switch fuels.
Winning may not be everything, but its still better than losing
I don't know you. I don't know what have done. If you are looking to talk up a race for 3 hours, I can tell you I don't have the time. But what I do have are a very particular set of parts; parts I have acquired over a very long career. Parts that make me a nightmare for people like you. If you go home, that'll be the end of it. I will not look for you, I will not punk you. But if you don't, I will punk you, I will race you, and I will embarrass you.
The GenTT crew in Adelaide have done a mild cam in a GTS with LS3 (M6). This retained the standard springs etc. 57rwkw (75.2rwhp) increase over stock from memory.
Given the driveline is the same in the GXP I'd imagine you'll see the same benefits over there too.
The LS3 is just a bigger and badder starting point. Makes me jealous too. Not that I mind my LS2 too much.
<SOLD>
MY07 - Phantom Black HSV Clubsport A6
248rwkw (332rwhp +15% difference in AU v US dynos) 622nm (458 ft/lb)
mods: CAI, Tinted windows, GenTT Tune.
Ditto that...When will the mod fairy visit my house. She hasn't been yet, and it's pissing me off. If the wife doesn't come through for my birthday, I may well have to purchase myself. I gave her Christmas and still coal in the stocking.Yep, definitely!
..
~Matt
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