04-04-2017, 04:28 AM | #45 | |
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The JB4 is a piggyback (basically a computer that intercepts the signals from the factory sensors and modifies them to make the factory ECU do what the piggyback manufacturer wants.) The Factory BMW ECU is very adaptive and will protect the engine even when it is being fed modified signals to a point. Which is why the JB4 is so popular on BMWs but other car brands don't really have something comparable. Apples and Oranges really though the end result is similar. The JB4 has a lot more features and adjustments you can't get with a tune. |
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04-09-2017, 09:33 PM | #46 | |||
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Long story short, but I've kind of hit a wall with adjusting the JB4 for the S63 since it simply lacks the support that their bread and butter platforms (N54, N55, etc) would get. Terry created a firmware change to the JB4 after myself and others needed a few tweaks, but for me, it's gotten to the point where Terry and Steve said I'll need to reach out to my tuner before we can go further. My next mods will be meth, M5 headers and TLOA stage 2 turbos. My tuner said that in order to run the headers, he'll have to create yet another tune and said that it'll ultimately make the JB4 unnecessary for me anymore. I'll still be keeping it for meth control, gauge monitoring and logs and for map 4 safety precautions. Unless you know something my tuner doesn't, I'm inclined to believe that the statement of "all tunes are the same" isn't true...unless buying from bigger names who only wanna make a quick buck and walk away. Quote:
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'10 BMW X5///M - Alpine White on Sakhir Orange - JB4 w/ HCP Stage 2 BEF, NGK 97506 @ .20, SS tubing & BMC filters, gutted cats, AC Forged 312 22's, H&R 2"
'98 BMW 740iL - ///E39 M5 6spd swap, fully built engine (sleeved, P&P, cams), 3.46 LSD, H&R Stage 2/Bilstein HD, Magnaflow 14816's '97 BMW 328ci - ///E36 M3 clutch & L/W flywheel, Z4///M 18's Last edited by m5james; 04-09-2017 at 10:21 PM.. |
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04-10-2017, 10:51 AM | #47 |
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Guys,
of all that I have read, i am surprised no one has mentioned upgrading there fuel pump to something more powerful and Ethanol compatible......like the Walbro 450 for example? I know Jose B@Ft.Hood has started there
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04-11-2017, 09:32 PM | #48 | ||||
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Would like to see your JB4 logs to see what timing is doing for you at that boost level. I'm sure if you put the time and money into it there are gains to be had. I just don't see it with this platform. On my GTR it was 4K in parts and I was in the 10's. This platform is cheap to buy now and a fun DD at the DP and tune level. After that you're blazing the path. I hope it works out for you. |
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04-13-2017, 04:01 AM | #50 | |||||
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My next mods in order are a BMS meth kit since I sold my Aquamist setup, adding and x-pipe and deleteing the stock muffler to put Vibrant resonators in their place (suggestion from M6Beast, he's got YouTube videos that'll give an idea on how it sounds) and last but not least adding F10 M5 headers after I have either Pure or Turbo Labs of America make me some stage 2's. After that I'm screwed because the trans can't handle the power...a company will rebuild it to handle over 1k for $5k or a buddy is determined to think he can swap in the DCT from an F10 M5. I agree that these are getting cheap to buy and to a point can even be cheap to get more power. Nice example of a JB4 only truck doing 11.7 - http://www.n54tech.com/forums/showthread.php?t=44867
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'10 BMW X5///M - Alpine White on Sakhir Orange - JB4 w/ HCP Stage 2 BEF, NGK 97506 @ .20, SS tubing & BMC filters, gutted cats, AC Forged 312 22's, H&R 2"
'98 BMW 740iL - ///E39 M5 6spd swap, fully built engine (sleeved, P&P, cams), 3.46 LSD, H&R Stage 2/Bilstein HD, Magnaflow 14816's '97 BMW 328ci - ///E36 M3 clutch & L/W flywheel, Z4///M 18's |
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04-13-2017, 04:08 AM | #51 | |
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With all that said, I was having certain situations where my trims were maxing out, so I was told to adjust my FOL (fuel open loop) from 60 to 80 and that should increase the pressure from the fuel pump. I didn't get drivetrain faults, something they said might happen if the DME freaks out, and to back it down to 70, but it's held steady at 80 and I'm no longer maxing trims. I'm NOT claiming I know the answer, but it sounds like fuel pressure isn't an issue for us just yet vs it being able to use it properly. http://www.n54tech.com/forums/showthread.php?t=46161
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'10 BMW X5///M - Alpine White on Sakhir Orange - JB4 w/ HCP Stage 2 BEF, NGK 97506 @ .20, SS tubing & BMC filters, gutted cats, AC Forged 312 22's, H&R 2"
'98 BMW 740iL - ///E39 M5 6spd swap, fully built engine (sleeved, P&P, cams), 3.46 LSD, H&R Stage 2/Bilstein HD, Magnaflow 14816's '97 BMW 328ci - ///E36 M3 clutch & L/W flywheel, Z4///M 18's |
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04-17-2017, 08:27 AM | #52 | |
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It looks like the tune can crank up fuel pressure which can increase fuel quantity injected, but not enough on its own to deliver the amount of fueling e85 requires. Can you adjust injection duration? Yeah that is a typical situation for folks trying to use E85. The problem as you know is our cars are tuned for gasoline which is stoichiometric at typically 14.7:1. E85 is about 9.8:1 so E85 which means the car needs to increase fueling by nearly 50% to reach stoich with that fuel. The car has some ability to adjust fuel delivery to maintain stocihometric ratios, but typically not more than 20%-30% which is why e85 doesn't work right. But since you're not maxing the fueling potential of the engine, I suspect the engine maybe more timing (not optimal in the tunes) and air flow limited. BTW adding meth can help some but if we're air flow limited then adding more fuel (meth) to the engine won't increase power substantially. Do you have any logs of timing, knock, mass air flow, fueling and iat? Id just be curious if the turbos are blowing more heat and not adding more air causing a pull in timing etc. |
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04-18-2017, 03:23 PM | #53 |
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Logs link is on post #50
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'10 BMW X5///M - Alpine White on Sakhir Orange - JB4 w/ HCP Stage 2 BEF, NGK 97506 @ .20, SS tubing & BMC filters, gutted cats, AC Forged 312 22's, H&R 2"
'98 BMW 740iL - ///E39 M5 6spd swap, fully built engine (sleeved, P&P, cams), 3.46 LSD, H&R Stage 2/Bilstein HD, Magnaflow 14816's '97 BMW 328ci - ///E36 M3 clutch & L/W flywheel, Z4///M 18's |
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04-20-2017, 10:10 AM | #54 |
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So I took a look at some of your logs.. Just a couple of observations;
1) its hard to really see whats happening in your engine the tool your using has a very low sampling rate, you get 1 data point about every 1.25-4 seconds. With this resolution it will be hard to catch a lot of transient behavior like timing changes, boost oscillation, etc. ideally you'd like a sample rate of 5-6hz or 5-6 times a second to catch transient behavior. Might try logging less parameters to see if you can increase your sampling rate. 2) most of your pulls are in a narrow rpm range. I would suggest getting a few more full range pulls starting in 4th gear and running to redline if possible to get a lot of good sampling. Most pulls are starting in the 4000rpm range and terminating around 5500rpm. I know this is hard to accomplish on public roads. But it would shed light on the health of the engine at all rpm's not just the narrow range. 3) I notice a lot of boost fluctuation in the car. What I mean is that boost will rise as rpm rises, then drop as you approach redline, then increase again. This isn't normal, boost should not rise past the point of peak turbo flow. May indicate a problem with boost control system, valve springs, leaks, etc. but its hard to say without logging of mass air flow. The car may also be pulling boost as a safety measure if there are a lot of misfires going on. Might help to measure timing per cylinder. 4) I also notice a lot of throttle plate fluctuation too on your car. You have the peddle floored, I see at 2800-3000rpm the car hits 100% throttle, snaps the throttle closed to 38% at 3900 rpm, even though you've not lifted the throttle, but dosen't pull timing, wonder whats going on there something not being captured in the log? A car / Tune safety measure to limit torque at mid rpm ranges? example from 2017-03-14 01_23_18 timestamp rpm boost pedal throttle avg_ign 19 2442 0.2 100 77 0 20.5 2399 1.2 100 81 0.9 22.25 2555 3.1 100 90 2.5 24.25 2671 5.1 100 95 4.3 24.75 2730 6.9 100 97 5.8 27.75 2828 8.2 100 100 7.3 29.75 2885 9.4 100 100 8.6 31 3082 10.2 100 100 10 33 3134 11.4 100 100 11.1 34.75 3325 12.6 100 75 12.2 36.5 3419 14 100 72 13.5 38.5 3537 15.2 100 51 14.4 40.25 3728 15.2 100 40 14.4 41.75 3933 16.3 100 38 15.3 Last edited by Thecastle; 04-20-2017 at 10:20 AM.. |
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04-20-2017, 03:57 PM | #55 |
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m5james dont you have a jb4? jb4 should be able to log everything, does the S63 jb4 not able to log?
when i was street tunning my pure stage2 335 my tuner would ask me to start logging at 2k rpm in 3rd gear and take it to fifth (WOT runs). If the jb4 for the x5m cant log i might have to skip it... |
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05-25-2017, 10:59 PM | #56 |
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These are all JB4 logs, I don't know if I have the ability to adjust the sampling rate.
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'10 BMW X5///M - Alpine White on Sakhir Orange - JB4 w/ HCP Stage 2 BEF, NGK 97506 @ .20, SS tubing & BMC filters, gutted cats, AC Forged 312 22's, H&R 2"
'98 BMW 740iL - ///E39 M5 6spd swap, fully built engine (sleeved, P&P, cams), 3.46 LSD, H&R Stage 2/Bilstein HD, Magnaflow 14816's '97 BMW 328ci - ///E36 M3 clutch & L/W flywheel, Z4///M 18's |
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06-29-2017, 09:31 PM | #57 |
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I read a thread on here that the Bluetooth OBDII dongle that's just sitting there doing nothing could actually be stealing resources and slowing the refresh rate. I'll remove the dongle next time I do logs after my meth install next weekend.
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07-07-2017, 09:37 AM | #58 | |
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How did the meth install go? |
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07-07-2017, 02:38 PM | #59 |
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Plan is to install it this weekend...damn mandatory OT screwed up my plans for a 4 day weekend on the 4th as well :-/ Found a friend of a friend locally who's got 2 55gal drums of methanol which I'm buying for a steal at $250, then I've got a firmware update to apply to the JB4...I'm excited to see how it'll help with the higher the average temps we've been having here in Seattle.
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05-25-2023, 06:49 PM | #61 |
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I’m pretty sure it’s no longer offered. I’ve sent used one pop up for sale from time to time.
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08-07-2023, 08:48 PM | #62 |
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They are just selling the Stage 1 for the e70/1 x5M/ x6M. I hear there was too many issues and/or not enough to dump more r&d? Correct me if I'm wrong
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08-07-2023, 08:53 PM | #63 |
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