[chuckies76ta]

Originally Posted by Steve C.

Charles,
Are these your 300-305 cfm CNC KRE heads Dave did for you ? If so, his remarks indicated when he used the Crane 99893 spring on those they were typically set up at 1.780-1.790 intake and 1.810-1.815 on the exhaust. I believe at one time you reported 1.785", and I presume that was on the intake.

Your Edelbrock heads are a much different story !

Dave's "Road Paver" is rated with 0.4000" lobe lift. Are you are still using your 1.52 rockers and I presume about .006" lash with the solid roller lifters? If so, some might suggest a spring that provided a minimum of 150 on the seat, and that's after run in and use. If it were me I'd set them up higher and expect at least 180 on the seat after run in with the solid roller lifters. And I watch the distance from coil bind, not go over .100". That's what PSI tech recommends regarding the coil bind distance with their springs.

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Thanks for the info. Yes there around 290/300 cfm as I can remember. Still using the Crower 1.5 stainless rockers. I can't remember the numbers from before. Might have been the wife's car at the time.

Need to find my head sheet from Dave.