Thread: Is the 97 Grand Prix GT 3.8L the same block as the 97 Grand Prix GTP 3.8L SC

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  1. #1 Is the 97 Grand Prix GT 3.8L the same block as the 97 Grand Prix GTP 3.8L SC 
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    My 97 Grand Prix GTP 3.8L turned a rod bearing and i need to know if i can buy a GT 3.8L and just put my Supercharger on it and it be the same? if the heads and cam are diff then i can use my heads cam timing all that stuff.
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  2. #2 Re: Is the 97 Grand Prix GT 3.8L the same block as the 97 Grand Prix GTP 3.8L SC 
    GrandPrix Junkie
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    Doing that is what will result in what we call a "top swap", as the pistons are different in the N/A blocks which results in a higher compression ratio. I'd stick to finding another supercharged motor and leave it be. GP's, Regals, Bonnevilles are some other 3.8L cars that came supercharged factory so don't limit your search to just the GP's.
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