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Originally Posted by Myaddiction
Thanks for doing this. BMS blew me off when I asked if I could do just this. I've had a JB4 on my 335i and on my M4. On your log it shows less then 20psi target boost (Pink line) and my 17psi actual boost (blue line) was this a run done on the stock map? Do you have logs from any of the other maps? Just looking for the boost curve under the different maps. Thanks
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Hey Bud,
Sorry to hear.. 17psi is fairly aggressive. Anything beyond that requires race fuel(ms109) for sufficient fueling. These cars run 8psi stock. You should scoop up the JB4 from the member above and get it installed, 110% worth it