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#1
10-18-2006, 11:30 AM
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99 GT or GTP?
I need a second car and am looking at a 99 GT. I'd like a GTP but I've always heard the superchargers cause a lot of problems? What has been your experience and would you recommend a 99 GT/GTP?
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1998 Blazer LT 4x4 W engine Pioneer DEH-P7500/2 Crossfire BMF 10s BFG All-Terrains 1997 Ford Contour MTX Duratec 2.5 Pioneer CD/2 Crossfire DB3 12s 
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#2
10-18-2006, 11:58 AM
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Re: 99 GT or GTP?
Go with the GTP!!! More performance due to the supercharged engine. You won't have problems with lower intake gaskets like the GT and I think you will find it is an overall better car. The supercharger shouldn't give you any issues unless the previous owner has damaged it in some way. I have a GTP with 142K and the supercharger works just fine. One suggestion if you get the GTP, change the supercharger oil when you get it and annually thereafter. It will save you a lot of problems later.
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#3
10-18-2006, 12:29 PM
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Re: 99 GT or GTP?
i just go by the fact that most people who own gt's wish they got a gtp..
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2000 GRAND PRIX GTP RED 14.345 @97.8mph ubend delete 3in jimmyC downpipe magnaflow high flow cat Joeflo CIA (made it myself) free bypass mod 3.4 pulley from zzp Gates premium belt 1 step colder plugs zzp PCM ss 409 xl turbo mufflers
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#5
10-18-2006, 01:46 PM
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Re: 99 GT or GTP?
I have a 99 GT (looks just like mike561's GTP) and don't regret buying it. The kid in me wants the GTP's performance, and my next one will be a GTP, but you won't regret the GT either. I get 21mpg around town, and better than 30mpg on the highway.
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 Still waiting for the "good old days" I'll get to bore my future grandchildren with!
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#6
10-23-2006, 10:26 AM
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Re: 99 GT or GTP?
Thanks for your responses! Any idea how much it might cost to fix if a problem does show up with the supercharger? The only reason I'm so hesitant about a GTP is the number of supercharger problems my mechanics see.
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1998 Blazer LT 4x4 W engine Pioneer DEH-P7500/2 Crossfire BMF 10s BFG All-Terrains 1997 Ford Contour MTX Duratec 2.5 Pioneer CD/2 Crossfire DB3 12s
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#7
10-23-2006, 10:39 AM
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Re: 99 GT or GTP?
I would be more worried about the UIM/LIM problems with SE/GTs (L36 SII 3800). One reason for high failure on the Eaton M90 Gen3 supercharger is lack of proper maintenance. Not changing out the SC oil in a timely manner. The old couplers were flaky and once replaced with the improved one that illiminates alot of problems.
If all else fails you can get a complete brand new Eaton M90 for around $600. Used/rebuilt go for way less. I still have my original supercharger. I have replaced the snout bearings, seal and coupler. Total cost was under $150 including machine shop for the snout bearings. A UIM/LIM job will probably cost more. Which model you get is your decision and you will have to live with it.
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'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8 '02 Oldsmobile Alero GL2 - LA1 3400 V6 '99 Buick Regal LS - L36 Series II 3800 V6 '03 Honda CR250R MX - 2 Stroke 250cc '97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold) Timeslip 08/12/06 AF Community Guidelines
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