need serp. belt size**job done** - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-21-2008, 01:02 AM   #1
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Default need serp. belt size**job done**

for my 96 SSEi
putting on a 3.5" on the SC
and putting on a **EDIT** 3.5" idler to take up the slack

I'm using GY 'Gatorback'

Thanks...Todd
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Old 03-21-2008, 01:10 AM   #2
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so, uh.. which belt do you want? the Supercharger belt or the serpentine belt?

A 3.8" idler is HUGE, stock is 3.0" and the oversized that INTENSE sells is 3.5"
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Old 03-21-2008, 08:05 AM   #3
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Quote:
Originally Posted by harofreak00
so, uh.. which belt do you want? the Supercharger belt or the serpentine belt?

A 3.8" idler is HUGE, stock is 3.0" and the oversized that INTENSE sells is 3.5"
The SC belt...for some reason I thought that when I did this to my 98 SSEi, I put on a 3.8" idler and the stock size belt worked just fine. But I cant remember, that was like 4 or 5 years ago.

T
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Old 03-21-2008, 08:08 AM   #4
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does a 90mm idler size make any sense to you?

I think...that is what I used then....
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Old 03-21-2008, 09:35 AM   #5
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90 millimeters = 3.54330709 inches

3.5", just like I said

you can use a stock sized belt if you have that 3.5 idler.
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Old 03-21-2008, 06:38 PM   #6
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Quote:
Originally Posted by harofreak00
90 millimeters = 3.54330709 inches

3.5", just like I said

you can use a stock sized belt if you have that 3.5 idler.
That confirms it.
Thanks,,,,Todd
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Old 03-22-2008, 02:51 PM   #7
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This is what I bought for future reference for everyone:


Supercharger belt: GY Gatorback part# 4060725 @ $21.99

The Accessory belt: GY Gatorback part# 4060940 @ $33.99

hope this helps

but remember this is for a 3.5 MPS upgrade using the 3.5 idler pulley size

Todd
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Old 03-22-2008, 02:54 PM   #8
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Most go to a 715 belt and a stock idler pulley for the SC when running a 3.4". That would probably be ok on a 3.5" as well, but the tension would be on the tight side.
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Old 03-22-2008, 02:57 PM   #9
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Quote:
Originally Posted by willwren
Most go to a 715 belt and a stock idler pulley for the SC when running a 3.4". That would probably be ok on a 3.5" as well, but the tension would be on the tight side.
Good to know.

Thanks
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