pulley question

grnstang · March 9th, 2009, 02:45 PM

i bought my car and it had underdrive pullies installed. i know there was a smaller pulley on the alternator i just took off my car...but i never liked it because my lights would dim etc. so i used the larger pulley that came wiht my new alternator. should i switch back to the smaller one? which will allow my alternator to put out more power?

93hatch · March 9th, 2009, 02:46 PM

smaller=spinning faster=making moar juice

my lights dim at stops, has been doing it for over about a year and my car still starts right up everytime, even with my cheap ass neverlast battery

grnstang · March 9th, 2009, 02:49 PM

alright ill change pullies tonight. that makes sense. so what are underdrive pullies supposed to do? they actually improve the alternators output?

93hatch · March 9th, 2009, 02:51 PM

noooo they spin everything slower since the crank pulleys smaller, supposed to let ur motor rev up faster=moar hp

88-gt-t-top · March 9th, 2009, 03:27 PM

Just consider that with the smaller pullie on the alternator, you're gonna get more "Juice" but the alternator may not last as long compaired to a stock pullie.

93hatch · March 9th, 2009, 03:29 PM

Originally Posted by 88-gt-t-top

Just consider that with the smaller pullie on the alternator, you're gonna get more "Juice" but the alternator may not last as long compaired to a stock pullie.

still spining slower cuz he had underdrives, might bring it up closer to what it would spin on a car with stock pulleys

88-gt-t-top · March 9th, 2009, 03:32 PM

Originally Posted by 93hatch

still spining slower cuz he had underdrives, might bring it up closer to what it would spin on a car with stock pulleys

I'm not sure I understand what you wrote?

93hatch · March 9th, 2009, 03:35 PM

Originally Posted by 88-gt-t-top

I'm not sure I understand what you wrote?

u said it wouldnt last as long if he puts the smaller pulley on the alternator, cuz the alternators gona be spinning faster than it was made to spin, but he has underdrive pulleys so its still not gona be spinning super fast so i doubt itll fuck it up

88-gt-t-top · March 9th, 2009, 03:41 PM

Originally Posted by 93hatch

smaller=spinning faster=making moar juice

So... in effect, if he has underdrive pullies on the accessories and alternator he'll be spinning faster? As I'm to understand it, under-drive pullies are like rear end gears, but for your belt. Besides this would take probably a year to affect his alternator, I'm just saying thats what I've heard...

93hatch · March 9th, 2009, 03:50 PM

Originally Posted by 88-gt-t-top

So... in effect, if he has underdrive pullies on the accessories and alternator he'll be spinning faster? As I'm to understand it, under-drive pullies are like rear end gears, but for your belt. Besides this would take probably a year to affect his alternator, I'm just saying thats what I've heard...

smaller ALTERNATOR pulley will make the alternator spin faster, BUT he has an underdrive crank pulley, which is gona spin all the accesories SLOWER

88-gt-t-top · March 9th, 2009, 03:55 PM

indeed sir, in-deed...

93hatch · March 9th, 2009, 03:56 PM

March 9th, 2009, 02:45 PM	#1
grnstang Hardcore Enthusiast 91 LX 13.7@101 Join Date: Oct 2008 Location: Norwalk OH Posts: 1,426 iTrader: 1 reviews	pulley question i bought my car and it had underdrive pullies installed. i know there was a smaller pulley on the alternator i just took off my car...but i never liked it because my lights would dim etc. so i used the larger pulley that came wiht my new alternator. should i switch back to the smaller one? which will allow my alternator to put out more power? __________________

March 9th, 2009, 02:46 PM	#2
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	smaller=spinning faster=making moar juice my lights dim at stops, has been doing it for over about a year and my car still starts right up everytime, even with my cheap ass neverlast battery __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

March 9th, 2009, 02:49 PM	#3
grnstang Hardcore Enthusiast 91 LX 13.7@101 Join Date: Oct 2008 Location: Norwalk OH Posts: 1,426 iTrader: 1 reviews	alright ill change pullies tonight. that makes sense. so what are underdrive pullies supposed to do? they actually improve the alternators output? __________________

March 9th, 2009, 02:51 PM	#4
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	noooo they spin everything slower since the crank pulleys smaller, supposed to let ur motor rev up faster=moar hp __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

March 9th, 2009, 03:56 PM	#12
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	__________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

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