Originally Posted by Cab_Burge
Me thinks it may want to be shifted at or above7500 RPM scope
The motor was still gaining power at 7200 RPM work

Cab, the 528 liked 7450 rpm out of low and the 2/3 actually happened quicker at about 7350, so i am not changing any settings in shift rpm. I have stainless valves and very heavy 7/16x .168 pushrods so i think it is smart to stay below 7500. It should cross the stripe right
At 7500 rpm.

8..603 156 mph best, 2905 lbs 549, indy 572-13, alky