1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Anyone run underdrive pully's? Any good?

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Old 01-18-04, 11:14 AM
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Anyone run underdrive pully's? Any good?

Just curious if anyone here has bothered with them and what they think.
Old 01-18-04, 11:48 AM
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I would think that they would be only needed for full time track cars, plus they underdrive our already wimpy alternator which isn't good.
Old 01-18-04, 12:38 PM
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Old 01-18-04, 02:02 PM
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I would recommend it if you are REALLY using a bridgeport. Or if you plan on sustaining rpm above 5000rpm all day long. Its not nessessary if you are not going to exceed 7500rpm much. It free's up the water pump from overspinning and cavitation. Slightly less drag on the engine too, but not enough to do it unless the engine is going to be out anyway.
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