what has an U/D done for you?
02-20-2008, 10:03 AM
#22
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"Actually, you are incorrect. Rotational mass is equivelent to rotational resitence. by placing a load on the pulley you are increasing the rotational resistance, thus increasing the net rotational mass. By spinning the accesories at a slower speed their is less parasitic loss due to their operation because there is less rotating mass."
agreed....i guess what i was trying to say was that you aren't gaining hp with an U/D pulley from having a lighter PULLEY....the gains are from the smaller diameter pulley spinning the accessories slower.
agreed that a small decrease in the mass of the pulley adds to the power increase...but that's more of a side effect.
"has anyone noticed a power loss in any of the accessories? dimmer lights or anything like that?"
i notice my headlights would dim a bit at idle sitting at a light....but only noticable if i was using other powered things like radio, wipers and heater blower....all at the same time. if it was just the lights and radio...i saw no difference.
granted thats with a manual trans.
i think the overdrive pulley for the alt is a wise investment for auto trans cars.
the install is pretty simple...if you have an impact wrench its even easier. this website gives the how-to on the pulley.
agreed....i guess what i was trying to say was that you aren't gaining hp with an U/D pulley from having a lighter PULLEY....the gains are from the smaller diameter pulley spinning the accessories slower.
agreed that a small decrease in the mass of the pulley adds to the power increase...but that's more of a side effect.
"has anyone noticed a power loss in any of the accessories? dimmer lights or anything like that?"
i notice my headlights would dim a bit at idle sitting at a light....but only noticable if i was using other powered things like radio, wipers and heater blower....all at the same time. if it was just the lights and radio...i saw no difference.
granted thats with a manual trans.
i think the overdrive pulley for the alt is a wise investment for auto trans cars.
the install is pretty simple...if you have an impact wrench its even easier. this website gives the how-to on the pulley.
02-22-2008, 02:29 PM
#29
You shouldn't need an overdrive alt pulley unless you have extra electrical setups in your car.
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02-22-2008, 04:41 PM
#33
SDPC!
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02-22-2008, 05:45 PM
#37
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