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Old 06-07-2011, 01:31 AM
Lothario80 Lothario80 is offline
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Default LFP Harmonic Balancer Kit

Hi Guys,

Came across this on eB_y and thought if there is any truth to their claim this would be the proving ground

Has anyone heard of installing an aftermarket harmonic balancer and can you actually acheive an extra 12hp at the rear wheels. If so what is the sacrifice? It says it slows down the accessories to increase HP.

Note that is does say it fits ALL 5.7L and 6.1L Hemi's in the auction.



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Old 06-07-2011, 09:00 AM
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Al E. Gator Al E. Gator is offline
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Underdrive pulley. It reduces the drive ratio to the accessories so it takes less power to drive them. This spins them at lower than designed speed so they will not work as designed and COULD cause problems with AC or alternator not performing at peak efficiency. This is a standard hot rod practice to recover horsepower but I think 12hp at the rear wheels is VERY optimistic.
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