07-14-2018, 09:23 AM
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#11 (permalink)
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Join Date: Aug 2017
Location: Colorado
Posts: 103
Drives: Infiniti G37s 6MT
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Quote:
Originally Posted by redondoaveb
I believe it's just the opposite. The 9lb (2.75) pulley which is the jackshaft pulley on the serpentine side is smaller than the 8lb (3.12) pulley. If you look at the signature of "stillenz84", post at the top of the page, he's running a 9lb (which would be the jackshaft on the serpentine side), a 2.85 sc pulley and a 3.47 jackshaft (that would have to be the jackshaft on the supercharger side). That's how I read it anyway, I could be wrong.
Topgunz - air to air upgrade
Getting back to the 3.20. I called Stillen and they tried telling me it was a vortech pulley. You can tell by the design of it that it looks nothing like a vortech pulley. It looks more to me like a magnuson pulley.
After reading your post again, the jackshaft pulley I was talking about is the one on the sc side (opposite the serpentine side jackshaft pulley). That's the one I'm replacing with a high traction. My serpentine side doesn't have any belt slip. |
Yea I’m talking about the SC input pulley being smaller. Serpentine side jackshaft you want smaller for more boost (so 2.75” for 9lb vs the 3something” 8lb), bigger on blower side jackshaft (his is 3.47) and then small on actual input shaft (i guess he’s made 2.85” somehow work). Don’t try to duplicate his numbers though he’s pushing like 17psi on a built block. It amazes me that you’re pushing 586whp on 12psi and he’s barely to 700whp at 17psi. You’re sea level maybe Oklahoma is a couple thousand feet but still, crazy! He must have the sur-grip on his 2.85” though that sounds like it would be slip city otherwise I don’t know why more people would put on a smaller serp side jackshaft pulley with bigger idler pulley to take up slack when they could just replace the SC input pulley with a really small one. Guess i’ll order the 3.15 and go from there
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09 G37S RWD 6MT, Topgunz Supercharger, CJM RFS, Walbro 450, 1050x, Nismo 1.5way LSD, Ecutek FF tuned by Seb IG: G3RSTY7 MyG37.com: RickyBobby
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