Alternator Pulley

95blackbeauty · November 26th, 2007, 10:10 AM

ok...so I recently put on my Ud. pulleys and i left the stock Alt. pulley. I read that leaving the stock pulley was a common app in order to get the max voltage. Will i lose alot of voltage with the new pulley? Am i robbing myself of alot of hp without the new pulley?

Bullitt95 · November 26th, 2007, 10:32 AM

Keep the stock alternator pulley. The risk of charging problems isn't worth the miniscule gain from using the underdrive pulley. The biggest HP thief is the water pump.

95StangMX · November 26th, 2007, 11:35 AM

+1.......you dont want to worry about your car not starting everytime you run to the store or something....you wont notice the difference in power....especially if you drive at night alot or if you have an aftermarket amp

FaStStAnG5-0 · December 1st, 2007, 01:23 AM

since you bought the part i would try it out!!! if you put it on & it has charging issues just take it off in the whole 5 min. that it takes & replace it with the stock pulley. i would defenately put on, drive around town for a few weeks just to see how it does..

every car is different.. i've had friends that put the Alt. pulley on that have never had a problem at all... so i'd say it's definately worth a try for sure! just don't take any long trips until you are sure your car is charging properly still! stay around town where you can always have a buddy jump your car if it dies!! good luck man!

Bullitt95 · December 1st, 2007, 10:56 AM

Unfortunately it's not as simple as just swapping pulleys. With the underdrive alternator pulley, you also need a slightly longer drivebelt.

FaStStAnG5-0 · December 2nd, 2007, 03:36 AM

belts aren't THAT expensive!! haha! i always have at least 2 or 3 around the garage for my cars

94cobra320 · December 10th, 2007, 02:35 AM

I thought the under drive alt. pulley is smaller so it can spin at the same speed and make the same power as before with the slower accessory speed?

November 26th, 2007, 10:10 AM	#1
95blackbeauty Enthusiast 95 5.0 too slow Join Date: Mar 2007 Location: Athens, TX Posts: 911 iTrader: 0 reviews	Alternator Pulley ok...so I recently put on my Ud. pulleys and i left the stock Alt. pulley. I read that leaving the stock pulley was a common app in order to get the max voltage. Will i lose alot of voltage with the new pulley? Am i robbing myself of alot of hp without the new pulley? __________________ 95 gt H.O. Udp's, Pypes O/r X, flowmaster 40's,CAI, 3.73 gears, C&L 76mm MAF,GT40p's, Shorties, 1.6 rr's,Gt40 manifold, short throw, Back Seat Delete BOOSTED

November 26th, 2007, 10:32 AM	#2
Bullitt95 Hardcore Enthusiast 1995 Mustang GT auto 13.36 @ 105.0 Join Date: Apr 2007 Location: Al Ain, UAE Posts: 1,391 iTrader: 0 reviews	Keep the stock alternator pulley. The risk of charging problems isn't worth the miniscule gain from using the underdrive pulley. The biggest HP thief is the water pump. __________________ 244whp/284wtq Mod list in My Garage

December 1st, 2007, 01:23 AM	#4
FaStStAnG5-0 Hardcore Enthusiast Join Date: Jul 2006 Location: Mooresville, NC Posts: 1,222 iTrader: 0 reviews	since you bought the part i would try it out!!! if you put it on & it has charging issues just take it off in the whole 5 min. that it takes & replace it with the stock pulley. i would defenately put on, drive around town for a few weeks just to see how it does.. every car is different.. i've had friends that put the Alt. pulley on that have never had a problem at all... so i'd say it's definately worth a try for sure! just don't take any long trips until you are sure your car is charging properly still! stay around town where you can always have a buddy jump your car if it dies!! good luck man! __________________ http://www.cardomain.com/ride/2461223 1994 GT: MSD 6AL, BBK O/R H-Pipe, Dynomax Race Bullet mufflers, 3:73 rear, Hurst Short Shifter, MAC cold air intake & much more coming soon!

December 2nd, 2007, 03:36 AM	#6
FaStStAnG5-0 Hardcore Enthusiast Join Date: Jul 2006 Location: Mooresville, NC Posts: 1,222 iTrader: 0 reviews	belts aren't THAT expensive!! haha! i always have at least 2 or 3 around the garage for my cars __________________ http://www.cardomain.com/ride/2461223 1994 GT: MSD 6AL, BBK O/R H-Pipe, Dynomax Race Bullet mufflers, 3:73 rear, Hurst Short Shifter, MAC cold air intake & much more coming soon!

December 10th, 2007, 02:35 AM	#7
94cobra320 Newbie Join Date: Sep 2006 Posts: 18 iTrader: 0 reviews	I thought the under drive alt. pulley is smaller so it can spin at the same speed and make the same power as before with the slower accessory speed? __________________ 2009 Highland Green Bullitt #5998 1994 Rio Red SVT Cobra #320 SOLD 2007 Tungsten Mustang GT

November 26th, 2007, 11:35 AM	#3
95StangMX MM Fanatic 95 Mustang GT depends how many people are pushing Join Date: Oct 2007 Location: Playa del Carmen, Mexico Posts: 3,223 iTrader: 0 reviews	+1.......you dont want to worry about your car not starting everytime you run to the store or something....you wont notice the difference in power....especially if you drive at night alot or if you have an aftermarket amp

December 1st, 2007, 10:56 AM	#5
Bullitt95 Hardcore Enthusiast 1995 Mustang GT auto 13.36 @ 105.0 Join Date: Apr 2007 Location: Al Ain, UAE Posts: 1,391 iTrader: 0 reviews	Unfortunately it's not as simple as just swapping pulleys. With the underdrive alternator pulley, you also need a slightly longer drivebelt.

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