August 16, 2022, 01:07 PM
Goobmotors
quote:
Originally posted by No Drag:
615 vs 632 which is the best.
Build the pump that best matches your cylinder head capabilities..
Clean sheet, no budget, bigger is better, if it can be built / repaired with shelf stock parts.
August 16, 2022, 03:14 PM
HolytownI always found that 615 and 632 Run within .01-02 in the 1/8 Mile, but the 632 has more steam in the 1/4.
As long as you get a teardrop cut on the crank weights, the 632's extra stroke won't cause much more windage.