Pulleys - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Forced Induction All questions and problems regarding Superchargers, Turbos, NOS, ZEX, intercoolers, water injection, etc.

Reply
 
 
 
Thread Tools Search this Thread
Old 07-27-2003, 02:47 PM   #1
Senior Member
True Car Nut
Thread Starter
 
Join Date: May 2003
Posts: 7,262
Thanks: 0
Thanked 0 Times in 0 Posts
ssesc93 is on a distinguished road
Default Pulleys

How much are pulleys for a supercharger and which one has greater performance, a bigger or smaller pulley?
ssesc93 is offline   Reply With Quote
Old 07-27-2003, 07:34 PM   #2
Junior Member
 
Join Date: Jun 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
2000SilverBullet is on a distinguished road
Default

Quote:
How much are pulleys for a supercharger and which one has greater performance, a bigger or smaller pulley?
You can buy a pulley fairly cheap for about $60 US but in order to change it, because it'* pressed on, you will have to buy a removal device that costs about $150 US.

Going to a smaller than stock pulley has the effect of increasing the rpm of your supercharger for any given engine rpm.

Very significant power gains, depending on how much smaller you go. A lot will depend on what other mods you have done in order to free up your intake and exhaust restrictions over stock. If you go too small you will get knock retard, which will defeat the gains. Your 93 is a Series 1 engine with a smaller supercharger than my Series 2 so it has a much smaller stock pulley than mine.
***** will give you some good advice since he has the same engine.

I went from a 3.8" stock to a 3.4" and gained about 30 hp and 50 ft-lbs of torque. Real seat of the pants improvement.
2000SilverBullet is offline   Reply With Quote
Old 07-28-2003, 12:32 AM   #3
Senior Member
True Car Nut
 
Join Date: May 2003
Location: Holt, MI & Lima, OH
Posts: 3,022
Thanks: 0
Thanked 0 Times in 0 Posts
dbtk2 is on a distinguished road
Default

Yes, pullies are around $60-70 US. The removal tool can be purchased for $130, but rented for $30. If you aren't going to remove the pulley more than 3 times, there is no reason to buy the tool, because it won't be worth the cost.

A smaller pulley will make the blower rotors spin at higher rpms, which will compress more air making more boost. The problem is that if you go to a pulley that is too small the blower will be making too much heat (when you compress air you generate heat) and it will cause knock which defeats the purpose of running higher boost. Because of this, you can only go to a certain size pulley with certain mods.

I don't know what size pulley would be good for you, but I would guess around a 2" pulley. Talk to willwren, he can definately help you out with that.

Quote:
I went from a 3.8" stock to a 3.4" and gained about 30 hp and 50 ft-lbs of torque. Real seat of the pants improvement.
Yup, it definately isn't some little gain like an air intake or anything, you really feel it, and it really wakes up the car. One of my neighbors with a '97 GTP came over and was asking about smaller pullies for the supercharger and asked how much power it added. I told him a 3.4 pulley on a stock GTP would add 25-30hp, and he knows cars pretty well so he knows that is a significant gain, and he didn't seem to believe me. So, he said he might order a 3.4 pulley for his '02 40th Anniversary that he is supposed to be getting very soon, and I think he will be quite suprised with the gains, he seemed a little skeptical.

If there is anybody on here that hasn't put on a smaller pulley yet, DO IT. You WON'T regret it. You will love the extra power!
dbtk2 is offline   Reply With Quote
Old 07-28-2003, 12:49 AM   #4
Senior Member
True Car Nut
Thread Starter
 
Join Date: May 2003
Posts: 7,262
Thanks: 0
Thanked 0 Times in 0 Posts
ssesc93 is on a distinguished road
Default

Okay, I am liking this conversation here! For my car, what is the recommended pully for my M62?
ssesc93 is offline   Reply With Quote
Old 07-29-2003, 01:16 AM   #5
Senior Member
True Car Nut
 
Join Date: May 2003
Location: Holt, MI & Lima, OH
Posts: 3,022
Thanks: 0
Thanked 0 Times in 0 Posts
dbtk2 is on a distinguished road
Default

I don't know anything about pulley sizes for the Series I L67'*. I know that there were different sizes for the 92-93 then there were for the 94-95. I think the size you need is a 2", but if I were you I would send a PM or email to willwren. He should definately be able to help you out.
dbtk2 is offline   Reply With Quote
Old 07-29-2003, 01:24 AM   #6
Senior Member
True Car Nut
Thread Starter
 
Join Date: May 2003
Posts: 7,262
Thanks: 0
Thanked 0 Times in 0 Posts
ssesc93 is on a distinguished road
Default

I remeber seeing on his signature that he has a 2.2" so I guess your right. I will Pm him soon. THanx
ssesc93 is offline   Reply With Quote
Old 07-29-2003, 05:55 AM   #7
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Stop the presses

NEWS FLASH!

The series 1 isn't a press-on. It'* keyed. You can use a standard gear or pulley puller, either a 2-jaw, but preferably a 3-jaw.

Series 1 differs. There'* one size for 92/93, and another for 94/95.

The first performance step for the 92/93 is 2.2" or 2.25", depending on who you buy it from. The stock 2.5" 92/93 pulley is the next step in performance for the 94/95.

Going to a 2" for the 92/93 is very extreme unless you have alot of other mods, and take VERY good care of the Eaton. Before going with the 2.2", you should have AT LEAST: Custom intake and cone filter (preferably with CAI or heat shield), 180 thermostat, preferably drilled, and another tranny cooler.

Buy your pulley from www.pulleyboys.com and make sure to get the gatorback belt with it. For the 92/93, because of the smaller diameter, the ZZP oversized idler is STRONGLY suggested by yours truly. You need it to get enough belt wrap around the smaller SC pulley to prevent belt slip.

Any other questions?

There'* a post in Forced Induction somewhere that I made to show the difference in the idlers for the 92/93. Find it, and consider it your bible for this mod.

Now let me scare you. With my raised redline (courtesy of Jet Performance Chips) and my smaller pulley, my M62 is ripping along at 13,000+ rpm'*. You better take VERY good care of the SC, or you'll be doing a rebuild on the SC in no time.

This thread is now moving to Forced Induction.......
willwren is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Pulleys, pulleys, pulleys TelePlayer Forced Induction 27 02-19-2004 01:09 AM
Question about stock pulleys bogart95sesc Performance, Brainstorming & Tuning 6 04-23-2003 06:32 PM
Aftermarket Supercharger pulleys 00SSEiWV Performance, Brainstorming & Tuning 1 04-09-2003 04:54 AM
water pump and alternator pulleys? 95naSTA Performance, Brainstorming & Tuning 12 03-20-2003 11:51 PM
Pulleys t-type Performance, Brainstorming & Tuning 2 09-19-2002 11:53 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:29 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.