Spring pressure / hydraulic roller cam

[bn69stang]

how does  380 open and 150 on the seat sound , comp recommends a 930 spring and that rate , first hydr roller ever so open to input on more or less pressure . I am running morrel lifter s and T @ D rocker s and the cam specs are -  232-240 @ .50   .559/.563 lift on a 112 lobe /  106 cl .. Bud

[Joe-JDC]

What size valves? material? hollow stem/titanium?  Most FE HR lifters are heavy, and Ferrea valves are very heavy if you use a 2.150-2.190 valve, so more seat pressure would be wise.  I think I would shoot for 160-180# on seat to be safe.  Joe-JDC.

[bn69stang]

Rev valves , 2.15 in and 1.68 ex and tool steel retainers , thanks Joe for the input .. Bud

[blykins]

I'm usually in that ballpark.  Fairly small cam though, so you could lean on the low side and be ok. 

Before you jump on a 930 spring, be sure and measure your current install height with the retainer you're going to use, then pick the spring based on that info. 

[bn69stang]

So Brent are say ng that for both seat and open ? , like 140 seat and 360-380 ? ..thanks  Bud

[blykins]

If I were doing it, I'd be around 150-160 seat and around 380 open.

[bn69stang]

Thanks Brent i appreciate the input , that s where i ll target it , and go from there , then get the heads on and figure out pushrod length