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      09-29-2022, 02:56 AM   #1
M6Roar
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Boost drop at low RPM - Any guess is welcomed

So I am having this weird issue that I can't figure out.

Done boost leak, DP seals, turbo seals etc etc etc I even changed the vacuum pump.

My boost drops drastically once I hit the pedal until 5K~ RPM I tried everything possible nothing seems to work except when I modulate the boost solenoid via JB4 & my wastegate based on JB log is at 50 which eliminate the boost leak or vacuum leak.

I can keep running it with JB4 and call it a day but I prefer to log all the parameters provided by BM3 or MHD.

Without JB4 modulation
Name:  boost drop.png
Views: 220
Size:  123.0 KB
https://www.bootmod3.net/log?id=62d6...0b435d150c7d05

With JB4 modulation
https://datazap.me/u/mohamed-albahi/...g=0&data=1-3-4

Any guess is welcome.
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      09-29-2022, 05:19 AM   #2
Mr. M6
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2014 BMW M6 F06  [9.25]
try to open BM3 support ticket Here and mention all the details

which map you are using ? OTS or custom ?
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      09-29-2022, 05:33 AM   #3
M6Roar
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Quote:
Originally Posted by Mr. M6 View Post
try to open BM3 support ticket Here and mention all the details

which map you are using ? OTS or custom ?
They were very helpful they even provided me with other revisions. I am running OTS stage 2 93.

I am guessing something has to do with exhaust manifold gasket, Yet no exhaust smell and on JB4 I am hitting the DME requested target with ease.
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      10-01-2022, 11:33 AM   #4
M6Roar
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Since I cannot modulate the OEM boost solenoids without JB4, my final idea is to add one boost solenoid tee it from the vacuum pump add another tee to the turbos wastegate and finally modulate using Torqbyte through the range of RPM and TMAP sensor value with slight 10ms to 20ms delay so it won't overboost during spool.

So in other words I will add little bump of vacuum to the DME requested vacuum
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