360 Advice Needed - Autocross / Street Engine Build

72bluNblu said

The fast ramps on the Lunati I think are a little deceiving. I’m no engine guru though, seems like the DCR still only gives you a snapshot and the window is really small because of the fast ramps. Cranking pressure on my 340 is 175-180 psi.

Click to expand...

That cranking pressure is abnormally high for your levels of SCR and cam and the DCR that results (7.7 using the advertised duration numbers). I get the same SCR number that you posted with a .028" thick head gasket. But that cranking pressure would be for about an 8.5-8.7 DCR.... gauge problem perhaps?

If it is really that high, then I can only think the cam is about a tooth advanced....naw.... I would not expect that.....but +15 degrees on the cam makes the cranking pressures come to that range... or being 1000' below sea level!