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Belt slip much?

We installed the AEM boost gauge today and while testing we noticed that up top the boost was dropping from 7/8/9 psi down to 2 or 4 psi randomly. This

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Old 07-12-2014, 12:41 PM   #1 (permalink)
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Default Belt slip much?



We installed the AEM boost gauge today and while testing we noticed that up top the boost was dropping from 7/8/9 psi down to 2 or 4 psi randomly. This got me thinking belt slip and I found this.

Any ideas what might cause it? We are running the Stillen 9lb pullley and a 7PK2635 belt, Gate Micro-V Horizon. I have a feeling its a combination of the smaller pulley not being shot blasted for grip and the Gates Horizon belt.

Would a Micro-V AT or Micro-V XF belt be better for grip?

Does anyone have the part number for that 7 rib idler pulley? We have noticed that one has play in it.

Last edited by ART_Auto; 07-12-2014 at 12:43 PM.
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