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Forced Induction Forum
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Old 04-01-2017, 11:15 AM   #1
Alpine-E39
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ESS Base Tune Modifications

Has anyone had experience modifying their ESS tune? There is software called BimmerEditor to tune but I'm just curious if in any way the ESS tune does not allow modifications. IE is it locked and only changable via eflash? Also, what stops us from sharing custom tune files or ESS tune files?

I've had TS1 on my 528i for a year now. I have methanol injection, catless headers custom exhaust and bellmouth intake, currently still on TS1 tune with 85mm pulley thanks to rkneeshaw and it runs great but Im not pushing it past 6psi now. I had always planned on getting a custom tune. However I've tuned several megasquirt cars, and I work as a Test Engineer for an engine developement company so I think I could figure it out. BimmerEditor is 400 bucks but I wouldn't want to start the tune from scratch if the ESS tune is locked.

When the 2.8 goes i will replace it with a 3.0, which is another reason to buy Bimmer Editor over a custom tune.

What are your thoughts?
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Old 04-01-2017, 11:20 AM   #2
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Old 04-01-2017, 11:33 AM   #3
Alpine-E39
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Thanks for the quick reply. Have you personally done it? Mine is MS42 by the way. Its also my daily driver so Id rather not risk bricking the ECU.

Last edited by Alpine-E39; 04-01-2017 at 11:34 AM.
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Old 04-01-2017, 01:17 PM   #4
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I would love to go in and see what ESS actually did to tune the car for the TS kits.

I'm not thrilled with my ESS tune. The throttle is too ON/OFF and makes it hard to hoon well. They don't want to help.

So I'd love to find software and learn how to tweak this tune myself.

You're lucky you have MS42, and even Ms43 there is a lot of knowledge and tools freely available. MS45 is way harder.
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Old 04-01-2017, 01:56 PM   #5
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I can only answer for MS43 version unfortunately. With MS43, eflash is locked to the vin of the ecu. The files ess email you are not locked, but also useless without eflash. So for instance, you can load another persons eflash file onto your ecu without issues using eflash (eg,TS1,TS2,TS2+, and TS3). Once the tune file is loaded on the dme, it can be read using daniel_f's tools, tuned and flashed back. The file is not locked once on the dme.

Hopefully it will be similar for MS42. Failing that, you could always convert to MS43 which would likely be cheaper than bimmereditor.

Last edited by Davew; 04-01-2017 at 02:25 PM.
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Old 04-01-2017, 03:42 PM   #6
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As MS42 basically is pretty identic to MS43, i wouldn't think it's much different.

Quite interesting that such a hefty change in the engine is paired with so few changes.
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Old 04-01-2017, 04:40 PM   #7
Alpine-E39
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Anyone care to share with me a ts2 tune for now? haha
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Old 04-01-2017, 06:03 PM   #8
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Because you are going custom, I would suggest you do not need a TS2 tune for any reason. With MS43 the eflash process converts the file (mine was ms430069, and have noticed the same on ms430066) to ms430056, which has a lot of tuning options available. Hopefully this is also true for the ms42 software version. Would be a good start to see what software version you are running, and if there is free tuning access available.
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Old 04-02-2017, 07:02 PM   #9
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I'd be interested to see the ESS TS tune settings just to understand what they actually changed in there. I'd be very curious to compare that to a quality custom tune. It would either validate my current view that ESS tuning capabilities are sub-par (at least for the MS45), or if there are drivability issues with the custom tune then the ESS tune could be referenced for possible ways to address such problems.

Unfortunately my DME is running a very old MS45 firmware version that probably isn't readiliy available, so I can't compare my current TS2 tune to the original stock binary.

I'm seriously considering buying a spare MS45 DME, flash it to current OEM firmware, and then buy the ESS TS2+ tune. I'd then be able to compare the binaries of the OEM tune and the TS2+ tune in order to see exactly what was changed and how they tuned for the kit. Time and money....
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Last edited by rkneeshaw; 04-02-2017 at 07:04 PM.
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Old 04-02-2017, 07:15 PM   #10
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So there is this guy that can modify my 2001 BMW 330i via computer to 20+ horsepower. Any take on his claim?

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Old 04-02-2017, 09:49 PM   #11
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Rkneeshaw, you shouldn't need to purchase the ts2+ tune if you can find someone on here to send you the file...
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