Each motor was also run with a Wilson Manifolds 2-inch, open-carb spacer between the Victor Jr. intake and Speed Demon carburetor. The spacer added as much as 5 extra horsepower to each test motor, so it was included in the test. The final element in common between each motor was a CSI electric water pump. Neither motor was run with accessories. The electric water pump was used to circulate water through the motor during the dyno pulls, but no alternator, water pump, or power-steering pump was employed for this series of tests.