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[QUOTE=wildfire8;164815]I was looking at getting some light weight pulleys for my car. I wanted the increased power from them. But then though do the light weight pulley giver better FE as well as more power?
Has anyone on here ever tried light weight pulleys on their car?
IE
FE: Unlikely change as the weight change will be very small but the energy used to accelerate and decelerate the weight saved will not be needed so there will probably be some gain however small.
POWER: See above. Sorry but the power saved will again be small.
If the original pulleys are smooth it may even give less FE and power as the aero drag is increased.
I used them many years ago but to fix some weird harmonic in an engine in a boat which was destroying alternators at a great rate.
The fix by the way was to replace the fancy alloy spoked pulley with plain pressed steel unit with a different harmonic frequency but the same diameter.
It worked.
Pete.
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