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08-13-2008, 06:43 PM
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#1 | | TECH Enthusiast
Join Date: Feb 2007 Location: Canada
Posts: 652
|  G8 GT vs GXP?
So the GXP would get the LS3 which has bigger displacement, but same heads/intake and better tune but thats it??(plus the suspension/option etc.)
I just discovered the GT had the L92 heads..
Am I wrong or there wont be a huge difference? 
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08-13-2008, 07:36 PM
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#2 | | On The Tree
Join Date: May 2006
Posts: 104
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Don't forget optional M6 trans
__________________ -99 Trans Am WS6 M6-
Beefed up with the right stuff to make 403 rwhp  | |
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08-13-2008, 10:15 PM
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#3 | | On The Tree
Join Date: Mar 2007
Posts: 172
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Will probably have a bit more of a bodykit on it, as well as wheels.
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08-13-2008, 10:43 PM
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#4 | | TECH Apprentice
Join Date: Apr 2005
Posts: 315
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The biggest differnce is the LS3 cam. If they cost a good deal more it doesn't make much sense to me. I'd rather have the sleeper GT with a nice mild cam. 
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08-13-2008, 11:12 PM
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#5 | | TECH Enthusiast
Join Date: Feb 2007 Location: Canada
Posts: 652
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...It seems to me that the GT will be a better option anyway since it has the L92 setup. A bit modded will be as good as a LS3. GT will have M6 too next year.
Now I understand why those G8 can be quicker than I thought.
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08-14-2008, 11:27 AM
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#6 | | On The Tree
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I'll take the LS3 with the absence of the DOD lifters to deal with and extra bit of displacement.
GXPs also get 4 piston Brembos on the front.
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08-14-2008, 11:57 AM
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#7 | | TECH Addict
Join Date: Jan 2003 Location: Fuquay-Varina,NC
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And the number one reason anyone wants sports in a car, a 6 speed manual!!
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08-14-2008, 04:06 PM
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#8 | | TECH Enthusiast
Join Date: Feb 2007 Location: Canada
Posts: 652
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Quote:
Originally Posted by Redlinez And the number one reason anyone wants sports in a car, a 6 speed manual!! | I thought G8 GT would arrive with the 6 speeds option in 09'
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08-15-2008, 11:16 AM
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#9 | | TECH Resident
Join Date: Jul 2007 Location: Reading, Pennsylvania
Posts: 832
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Quote:
Originally Posted by Johnnystock I thought G8 GT would arrive with the 6 speeds option in 09' | I thought GM confirmed that they in fact would NOT be getting 6 speeds now, only the GXP. Correct me if I'm wrong though.
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08-15-2008, 03:09 PM
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#10 | | TECH Enthusiast
Join Date: Feb 2007 Location: Canada
Posts: 652
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Quote:
Originally Posted by 20SS07 I thought GM confirmed that they in fact would NOT be getting 6 speeds now, only the GXP. Correct me if I'm wrong though. | I missed this one..Bad move by GM if true. You can have a manual Accord, Altima, Maxima but not the G8 GT LOL
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08-15-2008, 10:22 PM
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#11 | | 12 Second Club
Join Date: Apr 2004 Location: Houston
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Quote:
Originally Posted by 20SS07 I thought GM confirmed that they in fact would NOT be getting 6 speeds now, only the GXP. Correct me if I'm wrong though. | That's what I thought, too. Dumb, unless the GXP is not overly expensive compared to the standard GT.
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1980 Pontiac Trans Am - Y84 Bandit Edition, WS6 - 455 with #96 heads, 234/244 Wolverine cam, Dynomax headers
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08-18-2008, 04:47 AM
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#12 | | On The Tree
Join Date: Jun 2005 Location: Huntington Beach, CA
Posts: 162
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I am pretty sure the reason why the manual is not in the GT is because DOD does not work with manual transmissions so why make a non-dod GT when people can just buy the GXP. | |
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08-18-2008, 06:37 PM
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#13 | | TECH Enthusiast
Join Date: Feb 2007 Location: Canada
Posts: 652
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because the gxp cost more..
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08-19-2008, 12:06 PM
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#14 | | STF Veteran
Join Date: Oct 2003 Location: Greensboro, North Carolina
Posts: 3,441
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Quote:
Originally Posted by Slayn I am pretty sure the reason why the manual is not in the GT is because DOD does not work with manual transmissions so why make a non-dod GT when people can just buy the GXP. | I believe this is correct.
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08-20-2008, 01:48 PM
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#15 | | 11 Second Club
Join Date: Mar 2004 Location: Portland, TN
Posts: 206
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Quote:
Originally Posted by Johnnystock I missed this one..Bad move by GM if true. You can have a manual Accord, Altima, Maxima but not the G8 GT LOL | Maximas don't come with the manual option anymore.
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08-20-2008, 03:22 PM
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#16 | | TECH Fanatic
Join Date: Aug 2005 Location: Sunny London, UK
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Apparently the Auto uses less fuel too, so will help CAFE standards.
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08-20-2008, 03:32 PM
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#17 | | Teching In
Join Date: Nov 2007 Location: North Canton,Ohio
Posts: 24
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DoD does not work with manuals and thats why you can't get the Gt with a manual. It is also the same reason the 5th gen has two engine options L99 for auto and Ls3 for manual.
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08-24-2008, 08:02 PM
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#18 | | Staging Lane
Join Date: Jul 2008 Location: DFW, TX
Posts: 83
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Are we talkin L99 like came in the b-body's? (265ci 4.3L V8)
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08-30-2008, 07:05 PM
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#19 | | TECH Addict
Join Date: Feb 2004 Location: Michigan
Posts: 2,322
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One thing I did not see mentioned with GT vs GXP was the gear. The GT has 2.9 and the GXP M6 will have a 3.7. I am sure that plays in to the 0 to 60 times.  | |
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09-02-2008, 01:50 PM
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#20 | | On The Tree
Join Date: Dec 2004 Location: SE Michigan
Posts: 128
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Quote: |
Are we talkin L99 like came in the b-body's? (265ci 4.3L V8)
| No, new L99 = LS3 with Dod/AFM.
BTW, G8 gets the LS3, no Dod/AFM for that.
Also 3.27 A6 (3.70 M6) rear vs. 2.92 Auto , so the GXP should be much quicker.
GM is stating 13.0 1/4 mile, 4.7 0-60; not bad for a stocker if those number hold true. LS3 will make more power than L76, you're starting with 40hp more and from what we know so far (402 rating is because of restrictive intake/exhaust compared to the vette ratings, so there's probably 20hp right there....just like in the GT).
Just going to come down to price difference--$5-6K no way, 3-4K hmm: 40 hp, better gears, better seats, brembos, better suspension, better front fascia...
Here's some pics of a GXP, in Michigan: http://www.j-body.org/forums/read.ph...84051&t=184051
(Sorry for posting another forum, but they aren't my pics).
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2009 G8 GT, Liquid Red, Red Interior almost stock
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