Can the JB3 2.0 read these 3 parameters

AltecBX · 04-13-2010, 01:06 PM

DME BOOST ACTUAL
DME BOOST TARGET
THROTTLE BLADE POSITION

I see that the "DME Boost Actual" is read by the ECU as the JB3 is outputting that signal in to the ECU.
The "DME Boost target" is the output of the JB3 TMAP sensor.
And from those two "Throttle blade position" is modeled.

Is this correct?

Mike@N54Tuning.com · 04-13-2010, 01:25 PM

The boost the ECU observes, DME actual boost, can be read by any tune. That is what they adjust to trick the ECU in to thinking it is running the stock boost.

The target boost is modeled by the JB3. It's not directly read. Same for throttle blade position. The structure of the JB3 boost control system doesn't require precise target boost information as the ECU itself is doing the fine tuning on the targeting and it already knows that value. The JB3s job is just to rescale the value in to a range the ECU is happy with.

Mike

AltecBX · 04-13-2010, 01:30 PM

Got it! Thanks

OpenFlash · 04-13-2010, 01:42 PM

More misleading info. None of those parameters are read by the jb3. DME actual boost is not read either. What is read by the jb3 is the desired MAP voltage output it is sending to the dme. The actual voltage being fed into the dme and what boost actual reading the DME translates this voltage to is NOT read by the jb3. These values are all internal to the DME. Reading with an external device (jb3) is only possible by reading data off of the CAN network.

Shiv

Mike@N54Tuning.com · 04-13-2010, 01:50 PM

Quote:

Originally Posted by shiv@vishnu

More misleading info. None of those parameters are read by the jb3. DME actual boost is not read either. What is read by the jb3 is the desired MAP voltage output it is sending to the dme. The actual voltage being fed into the dme and what boost actual reading the DME translates this voltage to is NOT read by the jb3. These values are all internal to the DME. Reading with an external device (jb3) is only possible by reading data off of the CAN network.

Shiv

Shiv you're getting pretty ridiculous now. The JB3 is generating the voltage signal, so of course it knows what voltage it is creating. It's loggable in the JB3 interface as ECU PSI. The DME itself converts that voltage to kpa. Since the V4 logs PSI like the JB3 instead of kpa it must not be reading the value either right? Pretty silly argument.

Mike

04-13-2010, 01:06 PM	#1
AltecBX Colonel 340 Rep 2,663 Posts Drives: BMW 335xi Sedan; BMW M3 ZCP Join Date: Nov 2007 Location: NYC iTrader: (0) Garage List 2018 BMW M3 ZCP [0.00] 2007 BMW 335Xi [0.00]	Can the JB3 2.0 read these 3 parameters DME BOOST ACTUAL DME BOOST TARGET THROTTLE BLADE POSITION I see that the "DME Boost Actual" is read by the ECU as the JB3 is outputting that signal in to the ECU. The "DME Boost target" is the output of the JB3 TMAP sensor. And from those two "Throttle blade position" is modeled. Is this correct?
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04-13-2010, 01:25 PM	#2
Mike@N54Tuning.com Joint Chiefs of Staff 5042 Rep 116,174 Posts Drives: 2007 335i, 2015 M3 Join Date: Dec 2008 Location: N54tuning.com iTrader: (89)	The boost the ECU observes, DME actual boost, can be read by any tune. That is what they adjust to trick the ECU in to thinking it is running the stock boost. The target boost is modeled by the JB3. It's not directly read. Same for throttle blade position. The structure of the JB3 boost control system doesn't require precise target boost information as the ECU itself is doing the fine tuning on the targeting and it already knows that value. The JB3s job is just to rescale the value in to a range the ECU is happy with. Mike
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04-13-2010, 01:30 PM	#3
AltecBX Colonel 340 Rep 2,663 Posts Drives: BMW 335xi Sedan; BMW M3 ZCP Join Date: Nov 2007 Location: NYC iTrader: (0) Garage List 2018 BMW M3 ZCP [0.00] 2007 BMW 335Xi [0.00]	Got it! Thanks __________________ 335xi Sedan 6AT \| Weather(70-85°F) \| N54 Tune Comparison Chart \|\| N54 Turbo Upgrade Comparison Chart -PROcede Rev. 2.5 ~ v5 (3/17 maps) / JB4 (8/21 maps) / COBB (Stg2+FMIC LT Aggressive maps) †Procede Map2(UT 45 - IGN 40) Aggression Target 2.0 \| 0-60 in 4.0sec \|\| †Cobb E30 LT (35% Ethanol/65% 93 Octane) \| 0-60 in 3.9sec AR Design Catless DP \| BMS DCI + OCC \| ETS 5 FMIC \| Alpina B3 Trans Flash \|235/265 19" Michelin PSS
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04-13-2010, 01:42 PM	#4
OpenFlash 1809 Rep 17,960 Posts Drives: A Lot Join Date: Sep 2006 Location: SF Bay, CA iTrader: (0) Garage List 2018 Ducati Panigal ... [0.00] 2016 Mazda CX5 [0.00] 2017 Aprilia Tuono ... [0.00] 2019 BMW M2 Competi ... [0.00] 2015 BMW M5 Competi ... [10.00] 2016 Ducati XDiavel S [0.00] 2016 AMG GT S [0.00] 2011 Ferrari 458 It ... [0.00] 2017 Charger Hellcat [0.00] 2015 KTM Super Duke ... [0.00] 2016 KTM RC390 [0.00]	More misleading info. None of those parameters are read by the jb3. DME actual boost is not read either. What is read by the jb3 is the desired MAP voltage output it is sending to the dme. The actual voltage being fed into the dme and what boost actual reading the DME translates this voltage to is NOT read by the jb3. These values are all internal to the DME. Reading with an external device (jb3) is only possible by reading data off of the CAN network. Shiv
	Appreciate 0