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      01-14-2013, 08:57 PM   #2
ziominix
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Drives: 2011 335i xDrive Coupe
Join Date: Nov 2009
Location: WV

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Spikes in between shifts are normal but I wouldn't figure that high. I've seen around a 14psi spike, but it holds firm at 12.5 when under heavy throttle in gear.
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CURRENT--2014 2LT Z51 Corvette Coupe-7MT
PAST--2011 335i xDrive coupe-6MT-