>From Andy:
Helps if we explain why that is though.
The factory fan setup is a fan with a clutch attached to the water pump
(and in some cases an auxiliary electric fan). Because it's directly
connected to the engine, turning the fan requires that power be sent
away from the driveshaft and into the fan to get it moving and keep it
moving. Remove that parasite and the engine revs a little easier and
gets slightly better mileage.
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I don't entirely agree with you. The Viper is still a parasite, unless you
are using a little electric generator stored in the bed to power it.
The electric power to drive the viper fan comes from somewhere. And since
the fan is moving more air than the stock one, it probably uses more power
for the job (not considering actual blading design here). Granted it
probably doesn't spin all the time, due to the temperature controller, and
although the point to the fan clutch is similar it is not as effective.
I agree that the engine will rev easier without the inertia of the stock
fan...But there will be additional load on the alternator when the viper
runs eating up your "free-ed" horsepower.
Jim
2003 qc 4x2 Dark
This archive was generated by hypermail 2b29 : Fri Feb 06 2004 - 11:46:54 EST