Decoupler Pulley Retrofit - GM Forum - Buick, Cadillac, 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)

Thread Tools Search this Thread
Old 06-28-2018, 08:05 PM   #1  
Senior Member

Posts like a Northstar
Thread Starter
Join Date: Feb 2015
Location: Earth
Posts: 638
Thanked 108 Times in 96 Posts
CathedralCub is a name known to allCathedralCub is a name known to allCathedralCub is a name known to allCathedralCub is a name known to allCathedralCub is a name known to allCathedralCub is a name known to all
Default Decoupler Pulley Retrofit

Hello All,

I was driving my 1997 LeSabre to work today like usual. Out of habit I backed off the throttle a bit as it was about to shift from first gear to second gear. It occurred to me that a significant part of that "kick" when shifting gears is the five (or more) pounds of alternator spinning three-odd times as fast as the crankshaft with a lot of leverage working against the crankshaft slowing down. I did the math just now and it works out to over 11,000RPM at say 4,000RPM engine speed with ~2.8:1 leverage over the crankshaft pulley.

This leads me to a fun idea: Anyone have thoughts on converting to a decoupler pulley like most of the new cars have? Is the shaft size and/or pulley depth and/or pulley size compatible?
CathedralCub is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Trunk Inflator Retrofit--Is this Possible? harrydunn 2000-2005 12 05-17-2006 09:04 AM
retrofit activated charcoal cabin filter? dimprov 1992-1999 4 12-24-2005 10:57 AM
Supercharger retrofit on non supercharged car??? rel3rd Performance, Brainstorming & Tuning 16 06-24-2005 11:01 PM
retrofit a series II or I SC for my vin c.. cost etc.. delta88 1987-1991 2 05-22-2005 09:08 PM
AC retrofit question xZim 1992-1999 3 07-24-2004 12:02 AM

alternator, decoupler, pulley

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 10:26 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 and affiliated sites.