If the pump cannot push the water like the regular pump can at high revs then Id say that may be your downfall.....if there was a way to regulate the speed of the pump with the rpms being spun youd be golden.......
One time I put a Moroso electric waterpump kit in a 78 Olds w/383 and M22 4 speed .....The waterpump couldnt keep up after the first time I whack the throttle and put the engine to 6500 rpm's for more than a quarter mile..I looked at the box and it said for competition use only meaning quarter mile only............I had to ditch the setup and go for an underdrive kit........
One time I put a Moroso electric waterpump kit in a 78 Olds w/383 and M22 4 speed .....The waterpump couldnt keep up after the first time I whack the throttle and put the engine to 6500 rpm's for more than a quarter mile..I looked at the box and it said for competition use only meaning quarter mile only............I had to ditch the setup and go for an underdrive kit........