I have one more question from my engine build sheet. The cam in a Comp Cams XM270.

226 in. 236 ex @.050
.544 in .547 ex @ 112

On the sheet is say's "Cam in @ 110.5"

Maybe some of you engine guru's could explain what exactly this means in terms of this Cam. Just trying to expand my knowledge base.

Thanks in advance,
Scott

It s advanced 1.5 degrees

Thanks Bobby. What do I gain by the cam being advanced 1.5 degrees? I have rebuilt motors etc...but always installed the cams straight up. Degree a Cam is kinda Greek to me.

Scott its a fairly long topic and I will be glad to help ,but in short it makes the power come on at a lower rpm than straight up and retarding it works the opposite way ,but 1.5 degrees is no worth anything I think thats just the way everthing lined up and he left it there instead of making it straight (Timesaving) 4 degrees is common either way not 1.5 degrees
hope this helped alittle if not p.m. me

I never can keep these cam things straight. The XM270 has a centerline of 108* (I believe) and an LSA of 112. So that means the cam is ground with 4* of advance. If it was installed at a centerline of 110.5*, isn't that 2.5* retarded?

Or am I retarded?