Compression Testing

[stmcomms]

Hi, I am doing a compresion test with a friend comparing engines, I dont know what compression his car should be, HIs engine is a Windsor with a E303 Cam, Mor importantly I have a Factory VP 308, and I was wondering if anyone would know what my compression should be? Also will the cam alter the compression from the normal factory model in the Windsor?

[xcop5l]

the cam may give you a different reading

[Hillerus]

the cam may give you a different reading

Are you sure on that?

Anyway, id be more concerned at the moment about consistancy of the readings, rather than the actual highest number

[defa]

i can't see how the came will give you a different reading.. as full compression is read when the valves are shut.. right????
i agree with hillerus. if they all read low i reckon that would be better off that them all reading 130 except 1 or two reading at 110 or something..