I have a 549 cubic inch dodge running Indy 572-13 cnc385 heads, 15/1 compression on injected methanol. Intake valve lift is gross .868, .020 lash, and i checked deflection with race springs and see .030 loss of lift in running state. The motor made 982 hp at 7600 rpm.
My question is, with a head limited combo like this, what gains could be expected going from a 2.30 stainless valve to a Titanium valve, as well as possibly changing seat angles for further gains. I am guessing i could still retain the stainless exhaust since rpm will be kept below 7800 rpm max. Do i have to have different seats put in for the change?