JB4 Log

Foghorn · 03-01-2014, 04:14 PM

First chance to log with the JB4 G5 ISO and have a look on a stock 335XI. Apreciate any input on the log including parameters to use or view.

The car is totally stock other than the JB4 on Map 5 with 91 octane at -6C ambient air temp. Spark plugs and air filter have about 5,000 km on them.

Not quite wot early in the scan because of traction and road conditions.

Here's the log

http://datazap.me/u/foghorn/335xijb4...=1-4-6-9-11-13

Cheers

jayzF30 · 03-01-2014, 04:42 PM

It seems there are a few knock occurrences. Only cylinder 1 is available you can just hope that knock on the other five cylinders is minimal. That is one of the main drawbacks of a piggyback and why I chose Cobb over it. Maybe try a lower map and post it up for us.

Foghorn · 03-03-2014, 03:08 PM

Thanks for the input jazze90, sensible advice.

Your comments on logging knock sent me on a few tangents. Interesting that the JB4 only logs cylinder 1 unlike the Cobb where all cylinders can be logged. More intriquing still is that individual cylinder knock is a calculated value.

The other JB4 maps available have max boost values that exceed the 12.6 psi of boost in my log, maybe I'll have to use custom values in Map 6.

AlpineSwift · 03-03-2014, 03:14 PM

12 lbs of boost seems pretty low for a stock 91 tune. I'm running 16 lbs on Stage 0 OTS from Vishnu and I'm almost FBO. I was running the same boost with DCI's only.

Mike@N54Tuning.com · 03-03-2014, 03:33 PM

For lower grade fuels I'd suggest adding in the free PUMP back end flash. Will get boost up to around 15psi down low and clean up those timing drops. Also keep in mind boost is lower partially due to the colder weather. You move a lot more air with less boost when its cold out and thus hit octane limitations at lower boost levels.

Mike

mike@x-ph.com · 03-03-2014, 10:56 PM

Quote:

Originally Posted by AlpineSwift

12 lbs of boost seems pretty low for a stock 91 tune. I'm running 16 lbs on Stage 0 OTS from Vishnu and I'm almost FBO. I was running the same boost with DCI's only.

Apples and oranges

mike@x-ph.com · 03-03-2014, 10:57 PM

Quote:

Originally Posted by Mike@N54Tuning.com

For lower grade fuels I'd suggest adding in the free PUMP back end flash. Will get boost up to around 15psi down low and clean up those timing drops. Also keep in mind boost is lower partially due to the colder weather. You move a lot more air with less boost when its cold out and thus hit octane limitations at lower boost levels.

Mike

+1

AlpineSwift · 03-03-2014, 11:38 PM

Quote:

Originally Posted by mike@x-ph.com

Quote:

Originally Posted by AlpineSwift

12 lbs of boost seems pretty low for a stock 91 tune. I'm running 16 lbs on Stage 0 OTS from Vishnu and I'm almost FBO. I was running the same boost with DCI's only.

Apples and oranges

DCI only flash tuned @ 16psi on 91 vs his 12psi stock jb4 on 91 isn't really apples to oranges in my mind. I fail to see what you're getting at. I'm at high altitude and it's near end of winter in Colorado, there's literally no reason he shouldn't be pushing the same kind of boost on 91 with a JB4.

Mike@N54Tuning.com · 03-04-2014, 09:36 AM

Quote:

Originally Posted by AlpineSwift

DCI only flash tuned @ 16psi on 91 vs his 12psi stock jb4 on 91 isn't really apples to oranges in my mind. I fail to see what you're getting at. I'm at high altitude and it's near end of winter in Colorado, there's literally no reason he shouldn't be pushing the same kind of boost on 91 with a JB4.

The JB4 runs higher timing advance, less boost, to achieve similar power outputs. If you want higher boost, and less timing, then you need to incorporate the pump gas back end flash.

Mike

AlpineSwift · 03-04-2014, 10:38 AM

So whats the advantage to running a JB4 at that point if the flash just reverses what the JB4's primary function is?

Mike@N54Tuning.com · 03-04-2014, 10:46 AM

Quote:

Originally Posted by AlpineSwift

So whats the advantage to running a JB4 at that point if the flash just reverses what the JB4's primary function is?

The JB4 is still doing all the tuning. Running absolute boost control, controlling/adjusting fuel trims, wastegate adaption, auto tuning functions, launch control, in dash gauges, etc. The back end flash just allows the JB4 to use an alternative tuning method that can be advantageous in cases where octane is limited.

Mike

AlpineSwift · 03-04-2014, 10:57 AM

Makes sense. Adding one of these to my list of mods is gonna have to happen eventually when I go for more power anyway.

Foghorn · 03-05-2014, 01:27 PM

Is running less timing and more boost the goal of the beck and flash? Are there other scenarios the back end flash is intended to improve?

Is there consensus on whether more timing and lower boost or lower timing with more boost leads to more usable power for a daily driver?

03-01-2014, 04:14 PM	#1
Foghorn Private First Class 305 Rep 166 Posts Drives: 2007 335XI Join Date: Mar 2013 Location: Montreal, Quebec iTrader: (0)	JB4 Log - Stock 335XI First chance to log with the JB4 G5 ISO and have a look on a stock 335XI. Apreciate any input on the log including parameters to use or view. The car is totally stock other than the JB4 on Map 5 with 91 octane at -6C ambient air temp. Spark plugs and air filter have about 5,000 km on them. Not quite wot early in the scan because of traction and road conditions. Here's the log http://datazap.me/u/foghorn/335xijb4...=1-4-6-9-11-13 Cheers
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03-01-2014, 04:42 PM	#2
jayzF30 Captain 34 Rep 783 Posts Drives: '07 335i, '09 M3 Join Date: Mar 2012 Location: Thornhill iTrader: (0)	It seems there are a few knock occurrences. Only cylinder 1 is available you can just hope that knock on the other five cylinders is minimal. That is one of the main drawbacks of a piggyback and why I chose Cobb over it. Maybe try a lower map and post it up for us. __________________ '07 335i E90 - PTF ProTUNED by Dzenno - COBB FMIC - AFE DCI - AA DPs - HFS4 Meth '09 M3 - Stock
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03-03-2014, 03:08 PM	#3
Foghorn Private First Class 305 Rep 166 Posts Drives: 2007 335XI Join Date: Mar 2013 Location: Montreal, Quebec iTrader: (0)	Thanks for the input jazze90, sensible advice. Your comments on logging knock sent me on a few tangents. Interesting that the JB4 only logs cylinder 1 unlike the Cobb where all cylinders can be logged. More intriquing still is that individual cylinder knock is a calculated value. The other JB4 maps available have max boost values that exceed the 12.6 psi of boost in my log, maybe I'll have to use custom values in Map 6.
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03-03-2014, 03:14 PM	#4
AlpineSwift Colonel 77 Rep 2,114 Posts Drives: 2008 335Xi Coupé Join Date: Feb 2010 Location: Castle Rock, CO iTrader: (3)	12 lbs of boost seems pretty low for a stock 91 tune. I'm running 16 lbs on Stage 0 OTS from Vishnu and I'm almost FBO. I was running the same boost with DCI's only. __________________ E92 '08 335Xi 6AT - Cobb AP3 Tuned by MAC Autosport, Original Prototype Xi DOCRace 6266 Single Turbo Swap, VRSF CP w/Synapse BOV, VRSF 7" FMIC, BMS Cowl, H&R Coilovers, Renn Motorsport RS-51's, Stoptech Stage 2 Slotted, xHP Stage 3, Earl's Racing Oil Cooler, Turner Boost Gauge, M3 Lip Spoiler. Standing Mile Record Holder for Xi over a mile high: 168.2MPH @ 5512'; The Colorado Mile hosted by The US Mile.
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03-03-2014, 03:33 PM	#5
Mike@N54Tuning.com Joint Chiefs of Staff 4918 Rep 115,980 Posts Drives: 2007 335i, 2015 M3 Join Date: Dec 2008 Location: N54tuning.com iTrader: (89)	For lower grade fuels I'd suggest adding in the free PUMP back end flash. Will get boost up to around 15psi down low and clean up those timing drops. Also keep in mind boost is lower partially due to the colder weather. You move a lot more air with less boost when its cold out and thus hit octane limitations at lower boost levels. Mike
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03-04-2014, 10:38 AM	#10
AlpineSwift Colonel 77 Rep 2,114 Posts Drives: 2008 335Xi Coupé Join Date: Feb 2010 Location: Castle Rock, CO iTrader: (3)	So whats the advantage to running a JB4 at that point if the flash just reverses what the JB4's primary function is? __________________ E92 '08 335Xi 6AT - Cobb AP3 Tuned by MAC Autosport, Original Prototype Xi DOCRace 6266 Single Turbo Swap, VRSF CP w/Synapse BOV, VRSF 7" FMIC, BMS Cowl, H&R Coilovers, Renn Motorsport RS-51's, Stoptech Stage 2 Slotted, xHP Stage 3, Earl's Racing Oil Cooler, Turner Boost Gauge, M3 Lip Spoiler. Standing Mile Record Holder for Xi over a mile high: 168.2MPH @ 5512'; The Colorado Mile hosted by The US Mile.
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03-04-2014, 10:57 AM	#12
AlpineSwift Colonel 77 Rep 2,114 Posts Drives: 2008 335Xi Coupé Join Date: Feb 2010 Location: Castle Rock, CO iTrader: (3)	Makes sense. Adding one of these to my list of mods is gonna have to happen eventually when I go for more power anyway. __________________ E92 '08 335Xi 6AT - Cobb AP3 Tuned by MAC Autosport, Original Prototype Xi DOCRace 6266 Single Turbo Swap, VRSF CP w/Synapse BOV, VRSF 7" FMIC, BMS Cowl, H&R Coilovers, Renn Motorsport RS-51's, Stoptech Stage 2 Slotted, xHP Stage 3, Earl's Racing Oil Cooler, Turner Boost Gauge, M3 Lip Spoiler. Standing Mile Record Holder for Xi over a mile high: 168.2MPH @ 5512'; The Colorado Mile hosted by The US Mile.
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03-05-2014, 01:27 PM	#13
Foghorn Private First Class 305 Rep 166 Posts Drives: 2007 335XI Join Date: Mar 2013 Location: Montreal, Quebec iTrader: (0)	Is running less timing and more boost the goal of the beck and flash? Are there other scenarios the back end flash is intended to improve? Is there consensus on whether more timing and lower boost or lower timing with more boost leads to more usable power for a daily driver?
	Appreciate 0 Quote