Over sized balancer for boost
Le Mans Master
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Le Mans Master
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Burning Brakes
Joined: Aug 2014
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From: Mentor Ohio
Le Mans Master
Joined: Jul 2010
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Im almost certain you are going to need a DD system with that pulley size. Your going to have to isolate the S/C pulley belt. I would do the OD crank damper.
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Drifting
Joined: Jul 2013
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From: Maryland
I was going to tack on to the OPs questions that if there is an OD balancer added, is there anything that would keep you from going 10% vs. 15%? I'd think that, to a point, the larger OD balancer would increase the size of the blower pulley for increased surface area contact and with DD it wouldn't affect the accessories... I'm about to go through the same trade(s) and am deciding between 10% OD or 12-15% OD...
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Drifting
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Le Mans Master
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The subframe clearance issue can be taken care of by spacing the engine cradle away from the chassis by using something like the LPE spacer kit.
But then the problem becomes the water pump pulley to balancer clearance, which is tight even with the 10%.
IW actually makes a ~8.35” o.d. balancer, which has a actual pulley diameter of 8.25”, IIRC. That’s what I was told when I ordered my 10% OD IW, which has a pulley diameter of 8” and a slightly larger overall o.d. I was tempted to buy the larger version, but the sales rep at IW told me that he thought I would need to switch to an aftermarket WP that had a smaller pulley, so I bought the tried and tried 10% OD version.
But then the problem becomes the water pump pulley to balancer clearance, which is tight even with the 10%.
IW actually makes a ~8.35” o.d. balancer, which has a actual pulley diameter of 8.25”, IIRC. That’s what I was told when I ordered my 10% OD IW, which has a pulley diameter of 8” and a slightly larger overall o.d. I was tempted to buy the larger version, but the sales rep at IW told me that he thought I would need to switch to an aftermarket WP that had a smaller pulley, so I bought the tried and tried 10% OD version.
Burning Brakes
Joined: Sep 2009
Posts: 995
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From: Howell Michigan
Don't mess around, just do the A&A secondary drive with the proprietary balancer and laugh at belt slip.