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      08-26-2013, 07:08 AM   #999
pokeybritches
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Drives: ESS/G-Power Z4M, VF Z4, 996tt
Join Date: Sep 2009
Location: Los Angeles

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2006 BMW Z4M  [10.00]
2006 BMW Z4M  [8.50]
2003 BMW Z4 3.0i  [9.00]
Quote:
Originally Posted by ZStig
I don't know why I'm over thinking this. 2.87" is a 3 step smaller pulley than 3.33" and should therefore be 3psi higher than 7. 1psi per each size decrease
Not necessarily. For my non-M it worked out closer to 0.5 psi.
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