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JuanMaddox JuanMaddox is offline
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Posts: 8
Join Date: Jun 2020
Car: BMW
Default Can't reach target without an MHD dme tune? - 10-19-2020, 03:45 AM

2013 535i xDrive
ngk 1 step colder (originally gap .020, but backed it back to .028)
Pure Turbo stage 2 PWG essay writer set for 6inHg as it was on my stock (tested before disconnect)
GFB+ diverter upgrade
recently added N20 3.5 TMAP
VRSF charge pipe
xHP transmission tune Stage 3
New wastegate valve (didn't need it)
replaced all turbo seals. no boost leak
MHD with jb4 BEF (JB4_F_PWG3_RACE_5.bin)
JB4 firmware N55_F_PWG_INT_13_T1.hex
Connections (TMAP, MAP, FUEL, WG solenoid), Wireless to Android)
93oct (could be up to 10 Ethen in my area in NY)

Trying to hit Target (15 or so) and even though my boost in the beginning moves up slower (larger turbo??) I can only achieve 3psi under it when I load an MHD Stage 2 DME flash and running JB4 map2 (see csv 08_37_45)

I figured I would go to the MHD stock flash and try the JB4 on its own in map 2...where's my boost (see csv 05_04_59) after this quick test, I moved to map 5 (see 05_30_18). I tried tweaking duty bias, but my wgdc stays on 0 now. I had very low wgdc but was achieving high boost before.

I don't know why my wgdc stays low and why it works better or closer to what I should be able to achieve with a MHD stage 2 DME flash.

I was told I don't need to go ISO at this point, but I should be able to hit the jb4 targets on a stock MHD.

Last edited by JuanMaddox; 10-20-2020 at 10:33 PM..
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blackhat75 blackhat75 is offline
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Posts: 230
Join Date: Jul 2012
Car: guess...
Default 10-23-2020, 11:50 AM

when you tried tweaking the duty bias, did you remember to disable FF gain by RPM under the 'Options/view' tab in settings?
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