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      10-13-2014, 09:38 PM   #1209
gmd2003
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Drives: 2014 CP M6 and 2006 VT 525 Z4M
Join Date: May 2012
Location: South Carolina

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Quote:
Originally Posted by seank
Quote:
Originally Posted by gmd2003 View Post
I can't remember the crank off the top of my head but i got the smaller 79mm pulley from ESS for the blower with my 525 upgrade. Needless to say i do have slippage problems so I'm thinking about getting a significantly larger supercharger pulley.I'm only seeing 7.5 psi max in 5th gear due to slip so i will prob make more boost with a larger blower pulley lol. I was just so happy to not be running lean i didn't want to mess with it for a bit .
George
Edit I have a 135mm crank pulley with the Vt525 kit.
This would mean that you will need a retune once there isnt slippage, assuming you want to keep the same afr's.
my 7.5 psi in 5th is without slippage and is I believe due to me being completely catless with very high flowing headers . I'm mainly having issues with bad skip in 1,2,3 prob exacerbated by the speed which my car rips through those gears with 4:10's . I'm not getting out of the 5's in those gears .
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