Valve Spring Pressure
I was wondering if someone could comment on my spring pressure and tell me if I am in the ballpark. It's 330/250 E-Heads 2.19/1.77 an Ultradyne solid roller with .3994 lobe lift on both intake and exhaust. Duration is 264/270 @.05 on a 108 LSA. It's requiring a lot of shims but I have spring seats so I think that's OK. The IH seems to vary a lot from valve to valve. I am shimming the IH to around 1.760 +/- and am getting around 240 on the seat and between 598 and 612 open at .659 lift using 1.65 rockers. If using 1.5 rockers the lift is .599 and open pressure is 560-570 and I think that's a little low and don't want to put any more pressure on the seat so will plan to use 1.65 to get more open pressure. Thoughts please.
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Tim Corcoran
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