How to Add Horsepower to the 2004 GXP - Page 12 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

Bonneville GXP/ Northstar Powered Cars Discuss your Bonneville GXP and/or any other Northstar powered Olds or Cadillac... Including the 3.5L Twin Cam V6 (Short Star ) 4.0L and 4.6L Northstar V8's. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 10-14-2007, 01:55 AM   #111
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Default Re: Suopercharger

[quote=". but I cant remember the name of it.Its something with 3 letters like STX.I wonder if this supercharger could be a bolt on for the Bonneville?Does anyone know?[/quote]

That would be the cadillac XLR-V
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Old 10-14-2007, 02:09 AM   #112
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Well ya the new STS has a 4.6 L supercharged stock 435 hp engine.
Do we have anyone on this club that has one.

I don't think so.
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Old 10-14-2007, 02:11 AM   #113
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Originally Posted by 1999Daytona500PaceCar

Just so happens that I received a $12k discount when I bought my GXP.

Coincidence? Or Destiny?!
Neither. Very poor sales is the answer. I was offered one for COST to get it off the lot with 30 miles on the ticker.
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Old 10-15-2007, 12:43 AM   #114
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Regarding the XLR-V - it has a 4.4L version of the Northstar that is supercharged. It is rated at 469 horsepower. It is also found in the STS-V. Both are RWD with 6 speed autos. Unfortunately, I witnessed an STS-V on the dyno in cool conditions with low humidity and it only put down like 342hp to the wheels which would be a 27% loss in the powertrain. It was rather diaappointing. But I believe the way the supercharger is covered up and tucked very tightly against the engine that it probably suffers from heat soak issues which can cost you quite a bit of power.

Oh, willwren, I think someone said they could buy all the Bonneville GXP'* they wanted for 10 cents on the dollar - and they had ZERO miles on them to boot! I am sure you will be able to find one for FREE pretty soon - Ha!
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Old 10-19-2007, 12:28 AM   #115
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WHY, this person still in the Club, He consistently Posts off topic, throws barbs at Administrators and Moderators alike, demeans fellow members, has been told to bring his signature down to size many times and ignored a "do it or else" warning........I just dont get it.

BTW, MR DAYTONA, Will Wrens explanation is sound. I bought mine fully loaded for $29,000, a discount of $11,000. And to this they added the Mid Level GMPP $1600+, Body Corrosion and Paint Sealer Package $600, Free Oil Changes, and a Tankful of Premium Gas. The Sales Manager cited poor Sales and a overstocked inventory as the reasons I got the deal.

ptrfair, The Supercharger is indeed on the 4.4L. A slightly different engine model. If it would bolt on, it would just send the GXP PCM in a tizzy.
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