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The installation of a Pulley is independant of the power output off an
engine. If you have two identical engines, that redline at the same rpm,
but one puts out 100 horse and the other puts out 150, assuming all the
"assesories" are the same the same gains will be seen from the addition of a
pulley. The gains from a pulley are two fold. First is the reduction in
rotating mass, and two is the reduction "drive speed" for the assesories
(distibutor, pumps, etc) which results in less "power consumption" of these
components, and because the components are identical, and being driven at
the same speeds (in example above) the gains will be identical. You can not
confuse gains from a pulley with gains associated with "breathing mods"
(intake, cams, exhaust, etc.) Now if you take two identical engines and one
puts out 100 horses and the other puts out 150, but the one with 150
redlines at 9000, while the other redlines at 7000, then you will see
different gains, because the 150 horse engine is now turning at much higher
rpm's, in which situation the "drag" from the assesories will be much
greater, and with the installation of a pulley the gains will be much
greater. I hope that makes some sense.
Bryan Pendleton
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