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      04-03-2013, 01:10 PM   #11
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Drives: 2016 BMW i8
Join Date: Dec 2006
Location: Monarch Beach

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Originally Posted by Chriskm3 View Post
My p3 vent gauge showing 6.8 psi on a 540 vf kit with 508 whp. ESS 620 kit runs less psi with a smaller pulley? Hmm. Something is off them. Either my gauge or your gauge is not registering correctly. I also was under the impression that pulley size controls running speed of the blower which reflects on boost pressure
It's a good question/comment and either the EAS boost measurement is incorrect or my car is an anomoly.

Funny thing is that their boost measurements appears to be correct for every other 625 kit they have dyno'd and measured boost for. You can see the boost graph above...actually not even 6psi...maybe 5.5 to 5.75 before it spikes up when the throttle is closed.

I wish I had a good answer.
Daily: 2016 BMW i8
Airstrip: 2015 Porsche 991 Turbo S / GIAC FBO Meth 68mm turbos
Track: 2015 Porsche 991 GT3
Utility: 2012 BMW e92 M3 DCT
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