Whats the thrust compression on a 1987 buick grand national

[barbersride]

Looking to see if anyone know whats the thrust compression on a 1987 buick grand national?

 

[Mike T]

The term "trust compression" may not get you the answer your looking for. If your looking for compression ratio it's about 8:1.... if your trying to figure out what the estimated compression ratio would be a certain boost level there are online calculators that will figure that for you.