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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 05-02-2008, 05:16 PM   #1
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i have a 95 bonneville, installed a 99 grand prix gt engine into it, the only mod ive done is the cold air intake, gave me lil boost !! is it worth trying to put a supercharger on it and if so what else would have to be done to the engine without really breaking my pockets ? sometimes i get a lead foot, jus want a lil more hp !!!
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Old 05-02-2008, 05:33 PM   #2
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there a lot you can do about it you have a good engine and the 95 bonny is very light but youre pcm is obd1,5 and there not much tuning for it but the basic bolt on will work just fine
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Old 05-03-2008, 09:52 PM   #3
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well i actually had to switch the pcm also cause after i got the engine instaled it'll run for afew hours then it jus started shutting down while i was driving or sitting at idle ! so thats when i took it back to the shop and the told the guy wut it was doin, and i asked him if the pcm would have anything to do with it shutting down cause i know enough to diagnose a vehicle myself and everything that i checked that i thought i would make it shut down was fine. so he ordered a pcm for the 99 grand prix and i havent had any problems since ! so does it still matter that i changed the pcm if a 99 is obd 2 ?
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Old 05-03-2008, 10:44 PM   #4
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Huh? The 99 PCM shouldn't actually work on there without some work...the 95 has a completely different transmission.
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Old 05-04-2008, 12:28 AM   #5
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not to mention the fact that one is OBD-I and the other is OBD-II?
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Old 05-04-2008, 03:48 AM   #6
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hey, like i say, i havent had any problems since both 99 engine and 99 pcm were installed into the car ! im jus really gettin into 3800'* im use to big metal tanks !
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Old 05-04-2008, 10:13 AM   #7
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Default Re: more horsepower

Quote:
Originally Posted by da_grey_goose_95
i have a 95 bonneville, installed a 99 grand prix gt engine into it, the only mod ive done is the cold air intake, gave me lil boost !! is it worth trying to put a supercharger on it and if so what else would have to be done to the engine without really breaking my pockets ? sometimes i get a lead foot, jus want a lil more hp !!!
Seeing as no one else covered this part. No, not worth the work putting a supercharger on there. You would be better off changing teh whole engine and tranny, as well as the PCM. It'* not something you can just bolt on and go.
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Old 05-04-2008, 11:40 AM   #8
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Default Re: same subject

Quote:
Originally Posted by da_grey_goose_95
well i actually had to switch the pcm also cause after i got the engine instaled it'll run for afew hours then it jus started shutting down while i was driving or sitting at idle ! so thats when i took it back to the shop and the told the guy wut it was doin, and i asked him if the pcm would have anything to do with it shutting down cause i know enough to diagnose a vehicle myself and everything that i checked that i thought i would make it shut down was fine. so he ordered a pcm for the 99 grand prix and i havent had any problems since ! so does it still matter that i changed the pcm if a 99 is obd 2 ?
So who did all the wiring? Since those two PCM'* are totally incompatible with each other, dozens of wires would have to be spliced in. I think you either misunderstood your mechanic, or he has no clue what he'* talking about. If your PCM is still under the dash on the right hand side and there are no splices, you don't have a 99 PCM in that car, nor would there be any advantage with the 99 motor and/or 95 PCM. In fact, the PCM in the 95 on the L36 is the least-restricted factory programming the L36 ever saw.

Sell the car and buy an SSEi if you're thinking of a supercharger. There are other options, but that is by far the cheapest.
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