1999 Ford F-150 Lightning Kenne Bell Blower Swap
Eaton M112 vs. Autorotor(9 psi vs 9 psi)
I included the results of this test for those individuals (there are always a few) thinking that Test 1 was skewed due to the difference in boost pressure. The reality is that the two blowers are very comparable in displacement and the true test is to spin them at identical speeds relative to the motor. The Autorotor should not be punished because it flows better than the Eaton, but I included this test anyway to satisfy the roots-style fans. To produce identical maximum boost levels, we removed the 3-inch blower pulley from the Autorotor and installed a larger 3.50-inch pulley to slow the blower speed and reduce the boost. Even fudging the test by slowing the Autorotor, it outpaced the Eaton by 16 horsepower. Credit a better flow rate and less parasitic loss to drive the blower for the power gains. Even run boost for boost, the Autorotor MX420 demonstrated its superiority over the Eaton M112. View Related Article
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