BM3 Stage 2

Snow_335 · 07-14-2019, 05:56 PM

Just wondering how much boost psi I should be hitting on bm3 stage 2 I have a downpipe and chargepipe on the car, I did a log and it stays consistent around 15-16 psi boost pre throttle. Is this normal?

cjlane · 07-14-2019, 06:30 PM

That is the approximate target for the map.

mike@x-ph.com · 07-15-2019, 12:03 PM

Quote:

Originally Posted by Snow_335

Just wondering how much boost psi I should be hitting on bm3 stage 2 I have a downpipe and chargepipe on the car, I did a log and it stays consistent around 15-16 psi boost pre throttle. Is this normal?

Flash tunes do not target boost PSI but rather target load which translates into different PSI depending on the condition.
I recommend you datalog and send it to PTF, they'll let you know if everything looks good.

TerryGTX · 07-28-2019, 01:38 PM

Quote:

Originally Posted by mike@x-ph.com

Quote:

Originally Posted by Snow_335

Just wondering how much boost psi I should be hitting on bm3 stage 2 I have a downpipe and chargepipe on the car, I did a log and it stays consistent around 15-16 psi boost pre throttle. Is this normal?

Flash tunes do not target boost PSI but rather target load which translates into different PSI depending on the condition.
I recommend you datalog and send it to PTF, they'll let you know if everything looks good.

Isn't the bm3 boost based tuning and MHD the load based tuning?

MTWO · 07-29-2019, 06:10 AM

Quote:

Originally Posted by TerryGTX

Isn't the bm3 boost based tuning and MHD the load based tuning?

All flash tunes target load.

JaredG_F30 · 07-29-2019, 07:32 AM

They are both load based tunes but the timing and boost tables between bm3 and MHD are slightly different. From what I've seen in the logs MHD tends to target higher boost based on load with less timing and bm3 boost table targets seem to be lower with more advanced timing.

Quote:

Originally Posted by TerryGTX

Isn't the bm3 boost based tuning and MHD the load based tuning?

e46m3to335i · 07-30-2019, 09:13 AM

Which make it difficult to figure out if you have a small boost leak or not lol. Does anyone know if there are load PID's to monitor/log to see if you're hitting the load targets?

I know you log the duty cycle PID to see how hard your turbo is working but from what I have seen from dozens of logs, is that the EWG has a pretty high duty cycle to begin with(80-90).

07-14-2019, 05:56 PM	#1
Snow_335 2Fast 11 Rep 75 Posts Drives: 2015 F30 335i Join Date: Apr 2019 Location: New York iTrader: (0)	BM3 Stage 2 Just wondering how much boost psi I should be hitting on bm3 stage 2 I have a downpipe and chargepipe on the car, I did a log and it stays consistent around 15-16 psi boost pre throttle. Is this normal?
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07-14-2019, 06:30 PM	#2
cjlane Private First Class 48 Rep 164 Posts Drives: F30 335i xDrive Join Date: Oct 2017 Location: Pittsburgh, PA iTrader: (7)	That is the approximate target for the map. __________________ 2014 F30 335i xDrive 6MT - Pure Stage 2 GFB DV / Inlet \| XDI-35 HPFP \| Fuel-It PI w/ AIC and LPFP Upgrade \| BM3 \| Fabspeed Catted DP \| Dinan axle back \| VRSF Race FMIC/CP \| Dinan CAI \| KW V3 \| Wiechers CF strut bar \| Dinan ARB \| Spec stage 2+ clutch SMFW \| Full M Performance Interior \| M Performance BBK \| Vorsteiner VFF107 MPS4S \| Jordan Tuned Full E85 - 558WHP/520TQ on Mustang Dyno
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07-30-2019, 09:13 AM	#7
e46m3to335i Major 172 Rep 1,375 Posts Drives: 2015 F80 M3 Join Date: Feb 2010 Location: Fort Bragg, NC iTrader: (26)	Which make it difficult to figure out if you have a small boost leak or not lol. Does anyone know if there are load PID's to monitor/log to see if you're hitting the load targets? I know you log the duty cycle PID to see how hard your turbo is working but from what I have seen from dozens of logs, is that the EWG has a pretty high duty cycle to begin with(80-90).
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