I did a y7 bottom stock every thing and y8 head using y8 head gasket what should be my compression I've been seeing it should be high like up in the 10:1 but I did a compression test and got 150 Accross so that's 8:1-8.5:1 Plz help me out..... And we did the test when the car was Idealing at 2grand and then we fixed the problem by tighting the intake I forgot the tight that down all the way so it now ideals normal would that have change compression