Thread: GT 3.8 to a supercharge GTP

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  1. #1 GT 3.8 to a supercharge GTP 
    SE Level Member chuckbattams's Avatar
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    I accidentally bought a 1998 GT engine to replace my blown GTP engine out of my 98 Grand Prix GTP. I'm curious if I take the head off the GTP, could it be put on the GT engine? Then of course that would me I have a supercharged engine again, right? I am going to be installing headers with this swap out, if I do that, is everything going to be fine? My car as mentioned above, is a 1998 GTP with no mods, at present time. Oh yes, I also ordered a new PCM, letting them know about the headers, but of course my main question is... is the motor swap out going to be successful, or am I going to have to change something else?
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  2. #2 Re: GT 3.8 to a supercharge GTP 
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    You'll need to swap everything from the heads up...then get tuned...lots of tuned.
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  3. #3 Re: GT 3.8 to a supercharge GTP 
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    Search TOP SWAP in the SEARCH BAR, that should answer your questions.
    GPONA #1 Cyber Bully
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  4. #4 Re: GT 3.8 to a supercharge GTP 
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    Quote Originally Posted by blackspike2710 View Post
    Search TOP SWAP in the SEARCH BAR, that should answer your questions.
    You're making it to easy on him. lol
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  5. #5 Re: GT 3.8 to a supercharge GTP 
    GTX Level Member asite57's Avatar
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    the L36 engine you bought has 9.5:1 compression and your blown L67 has 8.5:1 compression so to run KR free you need more flow mods headers will help but if you alread have the engine out you should consider putting a cam in your L36 block along with a new timing chain some roller rockers then the L67 heads LIM and blower with a good tune youd have quite a build
    SOLD. 99 GTP - Open Cone, ZZP STB ,GMPP Front & Rear Sway Bar, 3" DP & Cat-Back, Built Trans, 12'' Brakes, Tune
    http://www.grandprixforums.net/gtp-t...ack-67489.html
    04 SRT4 - Bone Stock....For Now
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