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trebila trebila is offline
Posts: 1,279
Join Date: Mar 2013
Car: 135i
Default 09-01-2018, 02:32 AM

Originally Posted by Terry @ BMS
WOW, AFRs 15:1 from the beginning to 5000-5500 rpm, right when boost is peaking at 27-28 psi, I'd not target so aggressive AFRs for my customers, even on straight E85.

If you have to target so lean AFRs to use straight E85 and gain 20whp, I prefer to leave them on the table.

Terry is providing free BEF, it's the responsability of the S55 owner to use it.
I'd not feel comfortable to provide so lean tunes on S55 for my customers.

richer AFRs induce a much higher fuel demand for HPFP, which is the limiting factor, this is why on straight E85, I advice my customers to lower boost targets.

FBO N54 AT 135i 'vert with JB4 and Trebila Performance custom flash

Last edited by trebila; 09-01-2018 at 05:00 AM..
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