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Stephtech Stephtech is offline
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Posts: 39
Join Date: Sep 2016
Car: 335xi 2010 E90
Default Meth scaling with port injection & ISO 32.10 - 05-27-2018, 08:31 AM


I am using a METH port injection with the BMS controller. With the start of the new season, I have updated my JB4 interface and my JB4 firmware to G5_ISO_32_10.

I am monitoring the meth pump current via the FSB connected on pin 2 of the jb4 DB25 (instead of the PI injector current). In the release notes for the 32.10 firmware, it is mentioned to set the meth scaling to 99 if using port injection. I was set at 45 (since firmware 32.6) because of monitoring pump current.

Question I have, DO I HAVE to set it to 99 to keep PI working?(and change monitoring wire) or do I leave it to 45 to continue monitoring the meth pump? (which is my preference).


2010 E90 335XI 6AT with XPH stage 3 | JB4 G5 W/Trebila Tune | RB Next Gen+ | RB hot side INLETs | VRSF high flow OUTLETS | custom Stage 3 LPFP | ETS FMIC | MODDED VRSF CP | TIAL Q | BMS METH KIT CM10+CM5 | MMP Port Injection Gen2 | AR DESIGN cer. downP | BMS/MITSH OCC's | RB external PCV w/plugged HEAD | Best 1/4: 11.47@123mph
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