Durn it, I've been so busy I forgot one important item on this thread. This was with an old Racer Brown solid roller cam ground baaaack in 1967. The snag was with pushrods bending under the valve spring pressures and RPM's when we added the roller cam set up.
Now we are going back to the XE285HL for further tests with the EZ heads as we get the time.
I really wish we were making 650 HP with the XE285HL, but it should do really good. With the long duration roller we only have 120 psi cylinder pressure and we'll see some increase with the smaller solid/hydraulic cam.
