stock pullies vs. underdrives

mustang9450 · June 24th, 2011, 02:22 AM

I was wondering if i can use the lighter weight underdrive pullies with a supercharger system or do i have to go back to the stock pullies for it to work right?

SloMo · June 24th, 2011, 02:12 PM

I don't see why it wouldn't work properly. The underdrive crank pulley may affect your boost level tho.

mustang9450 · June 24th, 2011, 06:16 PM

i had heard underdrive pullies slow everything down causing boost to drop

Mustang Boy · June 25th, 2011, 02:45 AM

The underdrive crank pulley will lower your boost but you could use the other underdrive pulleys.

mustang9450 · June 25th, 2011, 03:06 AM

well if im not mistaken the only other pullies that come in an underdrive kit are the alt and waterpump right

sonataking05 · June 25th, 2011, 04:00 AM

I have heard of blowers causing lower quality aluminum underdrive pullies to distort due to more load.

Cschneider_23 · June 25th, 2011, 08:01 AM

ha sonataking05 to answer your sig no rust weighs the same unless some has been nocked off. wonder the same thing my self a few yours ago

Cschneider_23 · June 25th, 2011, 08:02 AM

i have a question aswell about the underdrive pullies, i got rid of all the accesories on my car now just have the alernator and power steering are there any underdrive kits for that or is my setup the best i can do?

Mustang Boy · June 25th, 2011, 12:39 PM

All of the underdrive pulley kits I have seen include a crank pulley, alternator pulley, and water pump pulley so you would be able to use them all.

Cschneider_23 · June 25th, 2011, 02:18 PM

what kind of numbers would i gain?

Mustang Boy · June 25th, 2011, 03:32 PM

A couple horsepower.

mustang9450 · June 25th, 2011, 11:40 PM

they say like 9-15 hp but you wont see that at the wheels by no means

jkeyz · June 26th, 2011, 12:18 AM

My friend supercharged his 95 with a vortec.. gave me his crank and waterpump underdrive pulleys because he couldnt use them with the supercharger.. cant use the crank cuz it fucks up the boost.. and couldnt use the waterpump because of temp issues with the vortec

bigjohnstud4200 · June 26th, 2011, 01:12 AM

You usually feel a better throttle response.

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1988 convertible · June 26th, 2011, 06:05 AM

Originally Posted by Cschneider_23

i have a question aswell about the underdrive pullies, i got rid of all the accesories on my car now just have the alernator and power steering are there any underdrive kits for that or is my setup the best i can do?

Get rid of the powersteering its pointless lol just my opinion tho

you might be able to get a pulley for the P/S but you can get deffo get different sizes for your alternator...

i'm using a 200amp alt with an underdrive pulley, works wonders.

Too small a pulley and you will wear out the bearings and brushes in the ALT quickly. Too large and you wont get a decent sustainable charge if you dont drive too often so id stick with the stock pulley if you have it...

1988 convertible · June 26th, 2011, 06:07 AM

Originally Posted by mustang9450

I was wondering if i can use the lighter weight underdrive pullies with a supercharger system or do i have to go back to the stock pullies for it to work right?

you will want to use standard pulleys or for high power strip applications overdrive.

June 24th, 2011, 02:22 AM	#1
mustang9450 Regular Join Date: Jun 2011 Posts: 55 iTrader: 0 reviews	stock pullies vs. underdrives I was wondering if i can use the lighter weight underdrive pullies with a supercharger system or do i have to go back to the stock pullies for it to work right?

June 24th, 2011, 02:12 PM	#2
SloMo Regular 1992 Mustang Lx 5.0 347ci 11.8@115 Join Date: Jan 2011 Location: Mississippi Gulf Coast Posts: 269 iTrader: 0 reviews	I don't see why it wouldn't work properly. The underdrive crank pulley may affect your boost level tho. __________________ Slow Motion... Quick reving, High compression, Big Boy 347 stroker... STROKER MOTION...

June 25th, 2011, 02:45 AM	#4
Mustang Boy Hardcore Enthusiast 1994 Mustang GT 14.582@92.58MPH Join Date: Sep 2005 Location: tampa florida Posts: 1,729 iTrader: 1 reviews	The underdrive crank pulley will lower your boost but you could use the other underdrive pulleys. __________________ 315's Crew Black and White Crew Crew Member #2

June 25th, 2011, 04:00 AM	#6
sonataking05 Newbie 1988 Mustang LX 5.0 ???? Join Date: Oct 2010 Location: MA Posts: 41 iTrader: 0 reviews	I have heard of blowers causing lower quality aluminum underdrive pullies to distort due to more load. __________________ Rust is lighter than metal......right.

June 25th, 2011, 08:01 AM	#7
Cschneider_23 Regular 1990 mustang GT Join Date: Mar 2011 Location: Fredonia WI Posts: 85 iTrader: 0 reviews	ha sonataking05 to answer your sig no rust weighs the same unless some has been nocked off. wonder the same thing my self a few yours ago __________________ Bored and Stroked 347 3.73 gears BBK Shorty headers BBK 255lph pump BBK intake Edelbrock performer II heads Ford 30lb injectors http://www.youtube.com/watch?v=I6TGUNjYuaE&NR=1 http://www.youtube.com/watch?v=3sFORkfhrY0

June 24th, 2011, 06:16 PM	#3
mustang9450 Regular Join Date: Jun 2011 Posts: 55 iTrader: 0 reviews	i had heard underdrive pullies slow everything down causing boost to drop

June 25th, 2011, 03:06 AM	#5
mustang9450 Regular Join Date: Jun 2011 Posts: 55 iTrader: 0 reviews	well if im not mistaken the only other pullies that come in an underdrive kit are the alt and waterpump right

June 25th, 2011, 08:02 AM	#8
Cschneider_23 Regular 1990 mustang GT Join Date: Mar 2011 Location: Fredonia WI Posts: 85 iTrader: 0 reviews	i have a question aswell about the underdrive pullies, i got rid of all the accesories on my car now just have the alernator and power steering are there any underdrive kits for that or is my setup the best i can do? __________________ Bored and Stroked 347 3.73 gears BBK Shorty headers BBK 255lph pump BBK intake Edelbrock performer II heads Ford 30lb injectors http://www.youtube.com/watch?v=I6TGUNjYuaE&NR=1 http://www.youtube.com/watch?v=3sFORkfhrY0

June 25th, 2011, 12:39 PM	#9
Mustang Boy Hardcore Enthusiast 1994 Mustang GT 14.582@92.58MPH Join Date: Sep 2005 Location: tampa florida Posts: 1,729 iTrader: 1 reviews	All of the underdrive pulley kits I have seen include a crank pulley, alternator pulley, and water pump pulley so you would be able to use them all. __________________ 315's Crew Black and White Crew Crew Member #2

June 25th, 2011, 02:18 PM	#10
Cschneider_23 Regular 1990 mustang GT Join Date: Mar 2011 Location: Fredonia WI Posts: 85 iTrader: 0 reviews	what kind of numbers would i gain? __________________ Bored and Stroked 347 3.73 gears BBK Shorty headers BBK 255lph pump BBK intake Edelbrock performer II heads Ford 30lb injectors http://www.youtube.com/watch?v=I6TGUNjYuaE&NR=1 http://www.youtube.com/watch?v=3sFORkfhrY0

June 25th, 2011, 03:32 PM	#11
Mustang Boy Hardcore Enthusiast 1994 Mustang GT 14.582@92.58MPH Join Date: Sep 2005 Location: tampa florida Posts: 1,729 iTrader: 1 reviews	A couple horsepower. __________________ 315's Crew Black and White Crew Crew Member #2

June 25th, 2011, 11:40 PM	#12
mustang9450 Regular Join Date: Jun 2011 Posts: 55 iTrader: 0 reviews	they say like 9-15 hp but you wont see that at the wheels by no means

June 26th, 2011, 12:18 AM	#13
jkeyz Regular 93 5.0 lx Join Date: Mar 2010 Posts: 342 iTrader: 0 reviews	My friend supercharged his 95 with a vortec.. gave me his crank and waterpump underdrive pulleys because he couldnt use them with the supercharger.. cant use the crank cuz it fucks up the boost.. and couldnt use the waterpump because of temp issues with the vortec __________________ Heres an idea.. ban the ones that are most knowlegable and helpful in the 5.0 section...oh wait lmao

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