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      04-02-2013, 11:11 PM   #1
Brigadier General

Drives: 2013 e92 M3
Join Date: Dec 2006
Location: Monarch Beach

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ESS 625 Pulley Swap

So I swapped out the standard 96mm pulley with a 92mm pulley to see how much power increase it would yield. Well, basically it didn't do much. It did increase boost by about instead of a measly 5.2psi I'm getting around 6psi. Still much lower boost than everyone else who has this kit but ironically it's make more power than most as well so I'm not complaining. I'll keep the pulley on for the upcoming Shift S3ctor roll-on event but it's coming off since I can't run this pulley with 91 octane.

Just goes to show that the kit is already optimized for the 625 adaptive software.

Here's an overlay of two of my dyno runs today with a dyno I did back in February with the 96mm pulley.

Blue and Red runs were from today's dyno and the green run was back in Feb with the 96mm pulley.
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Daily: 2013 e92 M3 DCT / ESS VT2 650 S/C / Akrapovic Evolution / StopTech BBK
Track/Airstrip: 2011 997.2 Turbo S PDK / GIAC FBO @ 30psi / GMG suspension build
Beaterz: 2013 X5 3.5 Sport, 2015 Wrangler Unlimited
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