I use 0.040" restricted pushrods on my race motor with a SR cam and in my brother's motor with a HR cam and both motors get plenty of oil to the top end and don't have any issues.
__________________
1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule.
|