[Stan Weiss]

Originally Posted by Jay S

There is less acceleration on the exhaust, that is why it has a 5 E/I split at .050” and more at its advertised rating. Quite a few Crower cams are like that. Crower does have their own way of choosing seat ratings on cams, it could definetly be calculated from something other than @ .020”.

Jay,
Thanks. I don't know how old those lobes are. I have seen '70s solid flat tappet cams with those type of 0.020 0.050 duration split numbers. Even the Ultra Dyne solid flat tappet cams show these split numbers in the 30's.

Stan