SC Pulley Question
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 3,088
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From: NY- 2013 Corvette Challenge Champion-2013 Index Combo Champion 2015 CC/MM Champion
St. Jude Donor '07
SC Pulley Question
I have a stock size ATI crank balancer with a 3.5in SC pulley making around 10lbs of boost,Im going to a IW 10% OD 8.5in. crank balancer,Roughly what size SC pulley would i need to get to keep it the same boost? 4"?
Last edited by DRIVER456; Dec 13, 2018 at 07:16 PM.
Drifting
Joined: Feb 2010
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From: Arlington Texas
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 3,088
Likes: 61
From: NY- 2013 Corvette Challenge Champion-2013 Index Combo Champion 2015 CC/MM Champion
St. Jude Donor '07
Melting Slicks
Joined: Nov 2013
Posts: 2,049
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From: USA
Are you sure the diameter is 8.5"? IW lists their 10 OD as 8.125" and 15 OD as 8.3xx". Either way 10% OD and 8.5" diameter does not compute, I would double check. I've seen A&A post a few times that general rule of thumb when you go to the IW balancer to run a s/c pulley that is 0.2" larger to compensate. 3.9 you may lose too much unless the pulley is indeed 8.5".
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 3,088
Likes: 61
From: NY- 2013 Corvette Challenge Champion-2013 Index Combo Champion 2015 CC/MM Champion
St. Jude Donor '07
Are you sure the diameter is 8.5"? IW lists their 10 OD as 8.125" and 15 OD as 8.3xx". Either way 10% OD and 8.5" diameter does not compute, I would double check. I've seen A&A post a few times that general rule of thumb when you go to the IW balancer to run a s/c pulley that is 0.2" larger to compensate. 3.9 you may lose too much unless the pulley is indeed 8.5".
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 3,088
Likes: 61
From: NY- 2013 Corvette Challenge Champion-2013 Index Combo Champion 2015 CC/MM Champion
St. Jude Donor '07
Ok i checked there website it is 8.125.thanks aaronc7
Last edited by DRIVER456; Dec 14, 2018 at 12:20 PM.
