[Stan Weiss]

Originally Posted by AG

Here's a question for you. I'm picking a cam for my street 494 ci motor and SD CNC RP eddy heads., here are the flow numbers and E/I ratios.

Lift (in) Intake Exhaust E/I
0.10 76.20 68.80 0.90
0.20 150.80 124.60 0.83
0.30 209.90 169.70 0.81
0.40 265.20 208.10 0.78
0.50 309.90 231.20 0.75
0.60 330.70 242.20 0.73
0.70 334.70 248.40 0.74

I was intending on running the OF with 3122B/3120B lobes with 1.65 rockers, but I'm thinking I don't need that much extra exhaust duration given the E/I ratios. My max lift Is 0.640".

You should call SD. What is your CR and usage for this engine? I thinking maybe the road paver.

Stan