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Originally Posted by HardcoreB
Nice! Did he spec you Seat/Open valve loads?

I told him what I was using and as I recall that was deamed ok. Due to economy I stayed with comp 947 triples on exhaust. Set at about 330 lbs on the seat. Intakes I had to go to PAC 1228 due to net lift of .848 after lash. Those ended up at 2.070 as I recall with about 310 lbs on the seat. The 1228 springs have a 2.100 spec installed hieght with 280 pds. At 2.070 they ended up at what I thought was enough since they have less mass than the 947s. The 2.070 is about max for -1 heads and I needed +.100 retainers and +.050 retainers combined with spring cups that are .030 thick.

Last edited by gregsdart; 11/12/21 11:26 AM.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky