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What size belt for a 3.85 ATi pulley?

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Old Apr 25, 2007 | 05:29 AM
  #1  
88GTAinRI's Avatar
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From: Ocean State, lil Rhody, the biggest littlest state in the union, Rhode Island
Car: 1988 GTA Black/Gray
Engine: Blown 355
Transmission: 700R4
What size belt for a 3.85 ATi pulley?

I'm switching my P1SC procharger to a 3.85 pulley. Anyone know what size belt I'm going to need? Thanks in advance.
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Old Apr 27, 2007 | 04:08 AM
  #2  
gta324's Avatar
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From: sweden
Car: GTA -89
Engine: Blown 415"
Transmission: 4L80E
Axle/Gears: Strange 12-bolt
Re: What size belt for a 3.85 ATi pulley?

On my 4,25" I had 1660mm= 65,35"

I also have a 3.85 pulley that I'm going to put on soon,
I will try a 1653mm=65"
or a 1642mm=64,65"

I'll let you know if you dont get there before me
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Old Jun 20, 2007 | 05:39 AM
  #3  
gta324's Avatar
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From: sweden
Car: GTA -89
Engine: Blown 415"
Transmission: 4L80E
Axle/Gears: Strange 12-bolt
Re: What size belt for a 3.85 ATi pulley?

Ok, tested a 1653mm last weekend and it was too long, will try 1642mm this weekend.

What belt size do you have now?
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Old Jun 23, 2007 | 10:10 AM
  #4  
Tony89GTA's Avatar
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From: Prince George, BC, Canada
Car: 89 GTA
Engine: 5.7L Supercharged
Transmission: T-56
Axle/Gears: Moser 9" 3.70
Re: What size belt for a 3.85 ATi pulley?

I use the 1653mm=65 belt on my 4.00" pulley. I can see the 1642mm one maybe working, also depends on brands to cause they all seem to be different then each other.
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Old Jul 4, 2007 | 03:50 AM
  #5  
gta324's Avatar
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Joined: Aug 1999
Posts: 2,441
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From: sweden
Car: GTA -89
Engine: Blown 415"
Transmission: 4L80E
Axle/Gears: Strange 12-bolt
Re: What size belt for a 3.85 ATi pulley?

1640mm and alot of work to put it on, but it works.
4.25" = 1660
4.00" = 1653
3.85" = 1640
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