Neil, just getting some info to take to my engine builder and I noticed the dur etc on the current cam is close to the Engle 56 and/or 58.
Is it worth doing being that they seem close or is the cam game like dog years, each +/- is a decent amount?
Current cam specs: Comp-Cams 20-224-4 extreme energy, 110 degree lobe centers, .488” intake valve lift, .491” exhaust valve lift, 230 degree duration @ .50” intake, 236 degree duration @ .50” exhaust. RPM operating range 1800rpm-6000rpm
Engle 56: Value Lift .504", Advertised Duration 272°, Cam Lift .336", Duration @.050" 224°, Lobe Center 110°.
.904" Lifter profile for midrange torque 9 to 1 compression street cars & trucks power from 1800-5500 RPM
Engle 58: Value Lift .520", Advertised Duration 276°, Cam Lift .347", Duration @.050" 230°, Lobe Center 110°.
.904" Lifter profile for Hot street performance, 9 to 9-1/2 to one compression, moderate idle, Midrange power 2000-5800 RPM
The 58 looks like it's the one that will offer greater performance gains (obviously).
What do you think the idle will be like? I don't think Dad would need/want a lumpy idle.
Thanks.