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-   -   what is our stock pulley size? (https://www.cobaltss.net/forums/2-0l-lsj-performance-tech-47/what-our-stock-pulley-size-18598/)

SS_SC_Cobalt 04-27-2006 05:12 PM
what is our stock pulley size?
 
:twothumbs I just got the gm charger kit for the j-bodys and the pulley seems different.it hits our tensioner..otherwise it is exact:twothumbs
anybody?
thanks!

Xenozx 04-27-2006 05:21 PM
3.34 I believe.

italstalnprd86 04-27-2006 05:28 PM
3.35 i thought it was....

SS_SC_Cobalt 04-27-2006 05:29 PM
Originally Posted by Xenozx
3.34 I believe.
that's what I thought, how do we measure it? is it outer rim measure or inner?

silverSS 04-27-2006 05:33 PM
85mm ~3.346"

zinner 04-27-2006 06:24 PM
bigger pulley on jbody model cause they run less boost.

SS_SC_Cobalt 04-27-2006 06:32 PM
Originally Posted by zinner
bigger pulley on jbody model cause they run less boost.
zinner u know da size of the j bod or how to tk the measurement?

Nuclear 04-27-2006 08:00 PM
Originally Posted by silverSS
85mm ~3.346"
thats the right one

SS_Supercharged 05-04-2006 12:40 PM
Measuring Pulleys
 
Originally Posted by SS_SC_Cobalt
that's what I thought, how do we measure it? is it outer rim measure or inner?
The Pulley is measured over pins. So with out a fixture it is virtually impossible to measure a pulley. The industry standard is to measure the diameter over 2.5 mm checking pins set into the belt grooves. So the Stage 2 pulley is 77.9 mm diameter over the pins. It measures 76.16 mm to the top of the belt grooves.


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