GSR Autosport First M4 ECU Tune: +50whp +50wtq mid range on 91 Octane!!

by Bimmerfest.com Member - Mike@GSR on July 25, 2014, 8:47 pm
GSR Autosport in conjunction with our Technicial Partners Jailbreak Tuning are proud to offer the very first ECU flash for the 2015 BMW M4. Results yielded +50whp +50wtq mid range on 91 Octane!!

We are in the final stages of Vehicle Tune Testing and Validation with the GSR M4 at Buttonwillow Racepark in California, completing another in a series of extreme climate test cycles.

Now for the tune results! Here is the graph showing stock power vs. power with our ECU tune. The runs were done on an extremely hot day, mid 90's which isn't ideal for power but was necessary as a part of our stress testing. If the car makes power in this kind of heat things can only get better with cooler weather. The car has run this tune on the track as well and has performed beautifully.







As you can see from the graph, huge torque gains down low help the S55 engine kick you in the back of your seat right away, 2800RPM sees gains of 60tq and 30hp at the tires, getting rid of a lot of the sluggishness commonly referred to as turbo lag.

Power delivery is smoother across the board and peak delta is in the mid-range where you need it with gains of almost 50hp and 50tq at the tires at 5000RPM. The car now pulls hard right when you punch it all the way to redline with a very linear power delivery and a much more aggressive engine note.

More information to come from GSR Autosport and Jailbreak Tuning….


Note: This is not a piggy back system (commonly offered in the mark place) it is an ECU flash, actually reprogramming the car's computer. As such, the car is not fighting itself to make the power and the ECU's adaptations will only enhance the power gained opposed to degrading over time.


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7 responses to GSR Autosport First M4 ECU Tune: +50whp +50wtq mid range on 91 Octane!!

Tony007 commented:
July 25, 2014, 9:20 pm

Wow, the uncrackable ECU has been cracked already. Bravo!!!
Mike@GSR commented:
July 26, 2014, 1:01 pm

Quote:
Originally Posted by Tony007 View Post
Wow, the uncrackable ECU has been cracked already. Bravo!!!
Thanks for the kind words! The 155 mph speed limiter has also been deactivated, we have already confirmed this during closed coarse testing but ran out of Road at 162 mph in 5th gear!
Dwight_Schrute commented:
July 27, 2014, 2:03 am

Quote:
Originally Posted by Mike@GSR View Post


Note: This is not a piggy back system (commonly offered in the mark place) it is an ECU flash, actually reprogramming the car's computer. As such, the car is not fighting itself to make the power and the ECU's adaptations will only enhance the power gained opposed to degrading over time.



Interesting statement. Could you explain what this means a little more? Thanks.
Mike@GSR commented:
July 27, 2014, 10:59 am

To answer a few pressing questions from bimmerfest members and put some anxious minds at ease:

- Yes, the ECU flash is real, this is not a hoax! No smoke and mirrors, it’s not a reported Yeti sighting… Hehe

- Yes, the ECU flash is done via the OBD2 Port just as the factory would do it.

- Yes, the Max speed limiter is deactivated (See Video Link on previous post)

- Data Logs and Related Information: We will post more information in the coming weeks as we are currently developing tunes for the F10 M5, the GSR 228i Racing Project, the 650 and 740 non M Turbo V8’s, and the current Generation 35i engines.

Please be patient as there is a massive amount of work involved in bringing these products to market utilizing proper testing methodology and validation processes. It is our goal to present the community with the best possible products that combine amazing performance with factory reliability.

As you can imagine having an OBD2 Flash available for the current “Untunable” generation of vehicles is no easy feat. While we are new to this Forum, we are an established and respected company. We have a very talented and experienced team which brings unique technical capabilities to the BMW Marketplace. Check out our New Sponsor Intro Post or give us a call to find out more…
__________________
Dwight_Schrute commented:
July 27, 2014, 3:15 pm

Quote:
Originally Posted by Mike@GSR View Post
To answer a few pressing questions from bimmerfest members and put some anxious minds at ease:

- Yes, the ECU flash is real, this is not a hoax! No smoke and mirrors, it’s not a reported Yeti sighting… Hehe

- Yes, the ECU flash is done via the OBD2 Port just as the factory would do it.

- Yes, the Max speed limiter is deactivated (See Video Link on previous post)

- Data Logs and Related Information: We will post more information in the coming weeks as we are currently developing tunes for the F10 M5, the GSR 228i Racing Project, the 650 and 740 non M Turbo V8’s, and the current Generation 35i engines.

Please be patient as there is a massive amount of work involved in bringing these products to market utilizing proper testing methodology and validation processes. It is our goal to present the community with the best possible products that combine amazing performance with factory reliability.

As you can imagine having an OBD2 Flash available for the current “Untunable” generation of vehicles is no easy feat. While we are new to this Forum, we are an established and respected company. We have a very talented and experienced team which brings unique technical capabilities to the BMW Marketplace. Check out our New Sponsor Intro Post or give us a call to find out more…
__________________
Thanks for the reply. I guess my question was how does the flash enhance power and a piggyback degrade power?
Mike@GSR commented:
July 29, 2014, 5:13 pm

Images from Buttonwillow with ambient temps around 100-107 F and track temps far north of that.









DerStig commented:
July 30, 2014, 9:04 pm

Mike,

We are all very excited, but you have to give us more than this. Show us the boost log from the dyno, that will prove that you did what you are saying.