[gw604z2jnpps]

Okay, I just broke my second idler pulley, the one provided with the 8 rib kit. I figured the first time it happened that it was just an anomaly. Apparently that's not the case. Both pulleys broke in an identical fashion, and both belts shredded in half at the moment of pulley failure.

I've got the Whipple with 13 PSI pulley, 8 rib kit, and Kenne Bell tensioner.

1) What would you do to solve the problem?

2) Should I purchase an aftermarket pulley, something a little stronger?

3) Is this common on forced induction vehicles?

4) Is it normal for the belt to break at the same moment the pulley fails?

[07gtmustang]

I would try and check the alimignt of the new tensioner check with a tube light bulb or straigt edge on the pullies. If you have 4 points of contact on the edges, of where straigt edge are then your good. and make sure the tensioner isn't getting bound up

[Drick]

Just had to say holy shit what a user name

[manOwar]

Originally Posted by 8t6gt Just had to say holy shit what a user name

[Wado]

When I installed my Whipple I had to modify my tensioner giving it a greater range of motion. All I can think of is to much tension or misalignment. I assume you are torquing to spec and bearing is free and happy on install.

[Grabber523]

Check the position of the upper idler to the right of the alternator (as you're looking at it)...you should have a few different holes to mount that pulley to to adjust your belt wrap and angle, try to make the turns the belt makes a little less sharp, but make sure you still have good tension on the belt...that may help...