Originally Posted by trax

Well, now that I'm running more and more math on it I can definitely see that .

I really have to apologize here--I just never had anyone there to point out the importance of this stuff to me, so I really didn't pay attention to anything else than duration and lift at .050".

My cam is 234/241 .575"/.596" @ .050, 112 LSA
The GM847 (actual GM part number 12370847) is 232/242 .575"/.595", 112 LSA

Obviously there's a difference there. I just didn't understand the underlying concepts to realize that those could be two completely different cams when speaking in terms of valve opening and closing angles.

The other thing that definitely didn't help was that whenever I talked to local car guys about their cam swaps, nobody ever warned me "watch out for how that cam is going to affect your DCR". So I stayed stupid for too long. Well now I know better.



Rich,

It looks like I edited one of my above posts at about the same time that you made your 3:34 PM post. Is my math in there correct?

Thanks

Originally Posted by trax

Well, now that I'm running more and more math on it I can definitely see that .

I really have to apologize here--I just never had anyone there to point out the importance of this stuff to me, so I really didn't pay attention to anything else than duration and lift at .050".

My cam is 234/241 .575"/.596" @ .050, 112 LSA
The GM847 (actual GM part number 12370847) is 232/242 .575"/.595", 112 LSA

Obviously there's a difference there. I just didn't understand the underlying concepts to realize that those could be two completely different cams when speaking in terms of valve opening and closing angles.