• Feb 21, 2008
The upcoming 2008 Pontiac G8 has a lot going for it. There's the oh-so-hot-right-now rear-wheel-drive chassis, a base price under $28,000 and the high-performance G8 GT with a 361-horsepower 6.0L V8 starts below $30,000. It's the performance bargain of the year, and if a forum post over at G8GT.com is to believed, the bargain is about get a whole lot better.

A dealership employee somewhere has posted a pic of GM's inventory controls website in which the engine option for the 2009 Pontiac G8 GXP is revealed to be none other than the LS3 6.2L V8. To refresh your memory, the LS3 replaced the LS2 as the base engine for the Corvette this model year. In the Vette, it produces 430 horsepower from 376 cubic inches, or 436 hp if you opt for a special dual-stage exhaust system.

There was a time when the Corvette kept all of its components to itself, but that ended when they started building the Cadillac XLR side-by-side with the iconic American sports car and began using its engines in the CTS-V. Nowadays, Cadillac regularly pilfers the Corvette parts bin, so why not Pontiac, too? An LS3-powered G8 GXP would be just short of epic in its degree of awesomeness, so let's hope the internet is right on this one. Thanks for the tip, John!


[Source: G8GT.com]


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  • 30 Comments
      • 6 Years Ago
      Gas prices this summer will make the launch of this very sad, indeed. Failure to develop an efficient OHC V8 will kill GM's efforts to profit on higher buck product. Welcome to the 21st century. Sorry you didn't see it coming. You still have a chance to adapt the Nissan or Toyota engines, but you still want to pay off the tooling from 1955.
        • 6 Years Ago
        If Toyota OHC engines are so great for gas mileage, then why does GM's 5.3L OHV engine get better gas mileage than Toyota's 4.7L DOHC? Or why does GM's more powerful 6.2L OHV engine get the same or better mileage than Toyota's DOHC 5.7L?

        Sounds like GM's OHV engines are doing just fine.
          • 6 Years Ago
          Very good point. Besides, the 5.3 is actually a very smooth mill.
      • 6 Years Ago
      Is it Insanity or Bribery?

      Global Warming, Expensive Gas and Terrorism, yet GM can still find a reason to build Ultra Guzzlers! I say GM is a subdivision of Exxon Mobile.

      The bible says "subdue" the earth, it doesn't say "DESTROY" the earth, and all the people on it.

        • 6 Years Ago
        I'm so sick to hear such hypocritical stuff! No one prevents you from driving your priuses; why are you people so obsessed with controlling what others get to drive? You know, that's my money, if I want to spend them burning gas, it's no one’s damn business! As for the "global warming", don't know from where you observe that warming, but I can tell you, it's damn too cold here in Toronto for damn too long. Besides, look around how people drive in those fuel efficient cars - pedal to the metal from the light. That kind of driving burns at least 20% more gas, but they don’t care – the only thing most of those people care about is to portrait the image of Earth saviors. I really hope GM will bring GXP with that Corvette’s engine, I'm so going to buy one, have been waiting for too long.
      • 6 Years Ago
      OHC engines do not consume less fuel than GM's pushrod V8s which are quite advanced in design, packaging, and overall engineering.

      Have fun trying to get over 25MPG freeway in your BMW 550i with it's "superior" OHC V8. My "inferior" LS2 V8 in my GTO yields nearly 30MPG freeway.

      Last I checked this country offers freedom of choice for automobiles (though CAFE will destroy it eventually) and you can choose to drive an economy car while I can choose to drive something like this instead.
        • 6 Years Ago
        In the US, we demand freedom, we want to eat out cake and have it too. We don't accept big engine=big fuel consumption.
        So ironically, without unlimited speed highways, we have better high speed cruising cars.
        Supercruise top gear.
        [honda gets it, look at the 2000 Acura TL, 5 speed auto, top gear 35mph/1K rev, top speed in 4th gear 25mph/1K]

        The rigid, socially engineered, norms of the old world are at play in the BMW's cars.
        Isn't 80mph 2100rpm in the GTO stick (and it has eEGR right?), and 2500rpm in the BMW 550i auto, and about 2750 in 550i stick (and don't forget weight & CdA, and the 5w-40 oil that BMW tells its customers to use)

        Hopefully BMW will do supercruise with the ZF 8 speed automatic. BMW's are just as traction limited as any other car. Take out the 3.38 axle ratio, and use the 2.65.
        Top speed would be in 6th gear, 80mph in 8th would be 1900
      • 6 Years Ago
      * I can see this happening since the 2009 Vette will have 450HP base engine!
      • 6 Years Ago
      More than likely, this will be a detuned LS3. There seems to be an "unwritten" law that while they may share engines, they will never exceed the horsepower for that level/trim of the Vette. I.E. - the base Vette is 430, nothing with that engine goes above it. The higher trim XLR-V is rated at 443 and an STS-V at 469, but both lie below the 505hp of a Z06. For the last (and possibly best) example, the CTS-V and ZR1 share the same supercharged LS9 engine - however, the ZR1 is rated at around 620 (give or take) and the CTS-V seems firmly set at 550.
        • 6 Years Ago
        True, and the differences for the Vette and TA/Camaro were LT1-300 Vette and 275 TA/Camaro, LS1 330 Vette and 300 TA/Camaro, not counting Firehawk/WS9/SS Packages, which were still lower than Corvette numbers.
        • 6 Years Ago
        Yeah, lots of companies seem to do that, though it seems rather stupid. I thought GM had given that up when they put an unaltered LS2 into the GTO, and put a LS6 (later LS2) into the CTS-V.

        The truth is, its more than HP that makes the Corvette. A 400hp CTS-V will be slower than a 400hp 'vette, as would a 430hp G8 be slower than a 'vette.
        • 6 Years Ago
        Not to mince words, but your statement is not entirely true. In 1996, the most powerful LT1 motor was not found in the Corvette. It was, in fact, the Pontiac Ram Air cars, at 305 hp. The Corvette came next at 300, than the Firebird/Camaro at 285, than the Impala SS at 275.

        So, while rare, it does happen. And according to Mr. Settlemire, Corvette does not like it when it does happen.
        • 6 Years Ago
        The ratings on the last gen F-body vs. the Vette were just that, ratings. There was no difference in the LS1 in the Camaro/TA to the one in the Vette, regardless of what it said on the window sticker. A 6 speed manual LS1 would dyno in the 310-320 range regardless of the name on the back of the car.

        The LS6 in the Z06 Vette and CTS-V were identical. The LS2 in the Trailblazer SS and Vette were nearly identical, I believe the intake and exhaust manifolds were the main difference.

        The ZR1's LS9 is actually a slightly different engine than the CTS-V's LSA. The Caddy's LSA has fewer psi's, slightly different valvetrain components and one fewer intercooler inside the valley housing and a few other differences. Autoblog posted the difference in the CTS-V story it posted awhile back.

        In any event, I'm planning on having kids within the next two years and my Vette may not be the best choice. The Pontiac G8 GXP would be great for family hauling, hauling ass that is!!!
      • 6 Years Ago
      Welcome to 4 years ago, GM. Ever heard of SRT-8s?
        • 6 Years Ago
        The G8 is actually competitive with the SRT8 with its L76 (not as quick but close).
      • 6 Years Ago
      Let's hope this is for real.

      With the CTS-V going stratospheric in power (and probably price), and the regular CTS lacking the oomph of the BMW 335/Infiniti G35 competition, this may be just what GM needs. Make sure it comes with a 6-speed!

      But is it me, or has GM slow-rolled the G8 to the point where everyone is losing interest? Is GM holding back? Is there fear of cannibalizing CTS sales?
      • 6 Years Ago
      This is for real .

      Latest edition of Motor in Aus shows HSV's new GTS-R using the Vette engine .

      Also HSV is going to move to the 6.2 V8 to put some distance between it and the regular SS , also to put it above Ford's new FG Falcon GT which is expected to have around 315 KW while the GTS is expected to have 325 and the GTS-R around 400 KW


      It'll be shown at the Melbourne motor show in March .
      • 6 Years Ago
      They should chop 2 doors off it and call it the GTO. Oh, wait.
      • 6 Years Ago
      430 hp is getting uncomfortably close to the scary fast end of the scale.

      I want one.
      • 6 Years Ago
      There was a time when the Corvette kept all of its components to itself, but that ended when they started building the Cadillac XLR side-by-side with the iconic American sports car and began using its engines in the CTS-V.


      Ummm, you're kidding right? The 1993 Camaro/Firebird had the same engine as the Corvette - LT1. How quickly we forget. Even before that, engines were shared...
        • 6 Years Ago
        ATL,

        Indeed. Even the Impala SS, Buick Roadmaster, and the Cadillac Fleetwood got the LT1. And the Camaro/Firebird got the LS1 in 1998.
        • 6 Years Ago
        I love when the Corvette shares, it makes me happy.
        • 6 Years Ago
        Sharing is caring.
      • 6 Years Ago
      I thought it was common knowledge the G8 GXP is getting the LS3, I know people have been talking about it for a long time.

        • 6 Years Ago
        Actually, since the Holden R8 and Vauxhall VXR8 have the LS2 already, it is not common knowledge that the G8 GXP is getting the LS3.
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