SC pully upgrade - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 05-15-2006, 03:02 PM   #1
Retired Senior Admin

Expert Gearhead
Thread Starter
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default SC pully upgrade

I'm considering upgrading my supercharger pully. If I measured right, I have a 4" pully, I assume this is stock. I'm coinsidering adding one of these from intense-racing.com.

MKP-320 - 3.20" Magnuson MP112 Supercharger Pulley
MKP-310 - 3.10" Magnuson MP112 Supercharger Pulley
MKP-300 - 3.00" Magnuson MP112 Supercharger Pulley
MKP-290 - 2.90" Magnuson MP112 Supercharger Pulley

I'm wondering if these will work on my 1997 SSEI, if I will need any special tools (dose not look like it) and approx. how much HP will I be looking to add? Also, will I need to change my stock belt to a shorter belt or change a idler pully to conpensate for the smaller diameter?

Any other information would be great. Thanks to all.
Danthurs is offline   Reply With Quote
Old 05-15-2006, 03:09 PM   #2
Senior Member
Posts like a Camaro
 
Join Date: Mar 2004
Location: Waterloo, NY
Posts: 809
Thanks: 0
Thanked 0 Times in 0 Posts
swartlkk is on a distinguished road
Default

Well, unless you have an MP112 (and not the stock Gen 3 Eaton M90), those pulleys won't work.

Your stock pulley is 3.8" diameter. You really don't want to go below 3.4 (or 3.3) without supporting mods, but I'll let others with more experience in this give you an idea of what is necessary. You want to check out the Intense Modular Pulley System.
swartlkk is offline   Reply With Quote
Old 05-15-2006, 03:29 PM   #3
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Welcome to the pulley club (or soon to change a pulley)

Having a 97 SSEi like you, I searched around before doing it and found that first you need to open up the air intake system by gutting the airbox and dropping in a K&N or changing to a "rice pipe", or going with a fenderwell intake system.

Once you have more air in..then you can swap the pulley w/o too many issues.

I chose to gut the airbox (can go into further if you'd like) and then happen across a pulley and pulley puller on ebay. The puller is a specialized puller required to change the pulley on an M90 (the supercharger on our 97 SSEi'*).

Pulleys can be found from many vendors. There are also standard looking pullies like you currently have on your car and what is referred to as MPS or Multiple Pulley Systems. The valve of an MPS is when you change from one pulley size to another if you plan on adding more mods and things to your car and wish to change the pulley with out renting the special puller again.

Intense, Pulleyboys and ZZP are three of the Bonneville Club approved vendors. Ebay may also be another good source as some of the vendors may auction a MPS at a reduced cost from time to time.

I originally won an auction for a 3.4" pulley and have run it well with some Knock Retardation. The 3.5" is probably a better solution to start wtih and I may be changing up to that size myself.
BillBoost37 is offline   Reply With Quote
Old 05-15-2006, 03:30 PM   #4
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

You want to go with a 3.5" pulley if you plan on leaving your car mostly stock. If you're gonna do some mods to it other than the pulley than you might want to go with a 3.4" pulley, but definately no smaller than that.

Your stock pulley is 3.8". When you measured it you measured the side of it and measured from top to bottom, but really the belt actually sits on the pulley lower than the area you measured and its 3.8" where the belt sits.

You also don't want one of the MP112 pulleys, because you don't have an MP112. Your blower is an M90. There should be M90 pulleys on their site, and I know that pretty much every other 3800 vendor sells them as well.
dbtk2 is offline   Reply With Quote
Old 05-15-2006, 03:34 PM   #5
Retired Senior Admin

Expert Gearhead
Thread Starter
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Quote:
Having a 97 SSEi like you, I searched around before doing it and found that first you need to open up the air intake system by gutting the airbox and dropping in a K&N or changing to a "rice pipe", or going with a fenderwell intake system.
This is already done. I made my own CAI.
Danthurs is offline   Reply With Quote
Old 05-15-2006, 03:47 PM   #6
Retired Senior Admin

Expert Gearhead
Thread Starter
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

See, this is why I ask questions. I found the correct pulley now. $60 aint that bad. I'll have to see what I can do about the puller. If anyone is in the area with a puller, speak up, I'll be happy to drive over and bring beer.
Danthurs is offline   Reply With Quote
Old 05-15-2006, 03:50 PM   #7
Retired Senior Admin

Expert Gearhead
Thread Starter
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Quote:
You want to go with a 3.5" pulley if you plan on leaving your car mostly stock. If you're gonna do some mods to it other than the pulley than you might want to go with a 3.4" pulley, but definately no smaller than that.
Well, I'm leaning towards the 3.5 right now. I plan a few mods, perhaps headers at some point, but that'* going to cost me.
Danthurs is offline   Reply With Quote
Old 05-15-2006, 03:51 PM   #8
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Dan..another possibility on the puller is to check the GP clubs in the area. It'* a popular swap with them as well. Possibly more of them local than bonne'*.
BillBoost37 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
(1) Brake upgrade (2) Sway bar upgrade wrair 2000-2005 3 04-04-2012 01:12 PM
blower pully upgrade superbonne97 Performance, Brainstorming & Tuning 10 09-28-2006 08:31 AM
FE2 swaybars upgrade: springs upgrade optional or no? Bugsi Performance, Brainstorming & Tuning 7 11-20-2005 09:16 PM
Strongly considering an upgrade...Upgrade complete! randman1 1992-1999 21 06-28-2004 01:14 AM
Nice "little" upgrade (turbo upgrade that is) Burgundy_Boat Lounge 6 09-07-2003 04:36 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 11:52 PM.


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.