New Cam Selection

[Wayne A Bender]

I'm trying to determine which cam between a roller 218 vs. 218/212 which is a split duration for my stroker motor, what is the difference.

 

[~JM~]

About 6 degrees.

 

[MCH86GN]

I'm trying to determine which cam between a roller 218 vs. 218/212 which is a split duration for my stroker motor, what is the difference.

About 6*! I think the lobe, aggressive or not, on the cam shaft is what you might what to discuss. I think in terms of duration 218/212 or 218/218 isn't going to make that much difference. I have 218/218 on my stroker and I think I like it, I haven't had a chance to light my car up yet. It's a 3312 or 3313 lobe, I don't remember, but that's probably more relevant than the duration. I could be wrong.

 

[earlbrown]

Then general rule with camshafts if that if you're torn between two grinds, go with the smaller one.
(and odds are that one is two big)

If it's a turbo engine, it's most likely way to big.