Supercharged compression ratio
How was the compression ratio dropped when the
supercharger was added to the 3800 was it the
pistons or the heads
all 3 with the head gasket.
Head gaskets may be different but it is the pistons that lower the compression ratio. Here is a read for you --- https://en.wikipedia.org/wiki/Buick_V6_engine#L67_Supercharged_2
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