[pnosker]

After many months, I finally have my M2C! Picked it up in Munich in November, again at the Performance Center last week, and now back at home.

It was approximately 50 F out, on the stock tires, and the only mod being the bootmod3 S55 Stage 1 93 octane tune. I only did one run without launch control in Sport Plus with MDM on and this was the result. I did have traction issues that higher temps may resolve. I didn't run a 1/4 mile since I was on the street on a 65 mph road.

Most of the car mags use a 0-60 with 1 foot rollout, so the comparable 0-60 time would be 3.52 seconds.

[FalconUSAF]

I did know this car could do under 4 seconds 0-60? What is "bootmod3 s55 stage 1?" Is it a software change? Does it increase HP? Does it void warranty?

[pnosker]

Originally Posted by falconxx12

I did know this car could do under 4 seconds 0-60? What is "bootmod3 s55 stage 1?" Is it a software change? Does it increase HP? Does it void warranty?

It's a software tune with ~485 hp/500 ft-lb peak output: https://www.protuningfreaks.com/coll...-bmw-f8x-m3-m4

[FalconUSAF]

Thanks! Wow! That is a huge increase in HP and torque with just a software tune? I assume it voids warranty?

[pnosker]

Originally Posted by falconxx12

Thanks! Wow! That is a huge increase in HP and torque with just a software tune? I assume it voids warranty?

It would void the warranty for the drivetrain if something happened and was detected. That being said, there have been many who have had no issue since you can return the car to the stock tune and lock the ECU again (though there is a flash counter on the ECU that will alert BMW to prior tuning if they look hard).

As with all modifications, don't expect warranty coverage if something breaks.

[five3three]

what app are you using in the first image?

[pnosker]

Originally Posted by five3three

what app are you using in the first image?

Dragy, it's a high resolution GPS (similar to VBox but without a screen) and app combo.

[Phantom_9192]

Is that app on a mobile device? If so, how did you combat 1hz GPS? Did you connect to a Bluetooth GPS at 10+hz?

[pnosker]

Originally Posted by Phantom_9192

Is that app on a mobile device? If so, how did you combat 1hz GPS? Did you connect to a Bluetooth GPS at 10+hz?

This app requires a Dragy 10 hz device. http://www.godragy.com/

[mike@x-ph.com]

Nice!

[brad65ford]

Good to see someone is using the dragys with their m2c. I didn't have internet connection to be able to post them.

Really curious as to what yours did with this stage 1 in a 1/4 mph, really interested in learning your mph and 0-60 in that same run. Currently (yes its slow) ran a 12.22 @ 114.92 with only the AA mid pipe. So itching to do the bootmod3 but a little leery with some of the guys having errors pop up. Have a feeling this car with stock everything except for tune should be in the 120's and mid 11's or even lower.

[pnosker]

Originally Posted by brad65ford

Good to see someone is using the dragys with their m2c. I didn't have internet connection to be able to post them.

Really curious as to what yours did with this stage 1 in a 1/4 mph, really interested in learning your mph and 0-60 in that same run. Currently (yes its slow) ran a 12.22 @ 114.92 with only the AA mid pipe. So itching to do the bootmod3 but a little leery with some of the guys having errors pop up. Have a feeling this car with stock everything except for tune should be in the 120's and mid 11's or even lower.

I haven't had a chance to run a 1/4 mile yet, unfortunately the posted time is all I have. I do think it would be well in the 11s though. My 135i with FBO, meth injection, and JB4 ran an 11.5 1/4 at 127 mph at Englishtown a few years ago on Hoosiers and the M2C definitely feels faster and launches better. I think even in the cold on the stock PSS may be that fast since the 135i hit 60 in 3.53 sec on that run according to my VBox.

[M-Pilot]

Originally Posted by brad65ford

Good to see someone is using the dragys with their m2c. I didn't have internet connection to be able to post them.

Really curious as to what yours did with this stage 1 in a 1/4 mph, really interested in learning your mph and 0-60 in that same run. Currently (yes its slow) ran a 12.22 @ 114.92 with only the AA mid pipe. So itching to do the bootmod3 but a little leery with some of the guys having errors pop up. Have a feeling this car with stock everything except for tune should be in the 120's and mid 11's or even lower.

So far I haven't seen anyone experience any problems due to the tune. Only errors I have seen so far are the ones that are related to the GTS transmission flash. If yours is a 6MT, there is nothing to worry about. If it's a DCT then don't do the GTS transmission flash till they get it sorted.

[brad65ford]

Originally Posted by cntzl

So far I haven't seen anyone experience any problems due to the tune. Only errors I have seen so far are the ones that are related to the GTS transmission flash. If yours is a 6MT, there is nothing to worry about. If it's a DCT then don't do the GTS transmission flash till they get it sorted.

Running DCT, but that makes sense to say away from the GTS tune. So have you run 1/4 mph times with yours yet?

[M-Pilot]

Originally Posted by brad65ford

Running DCT, but that makes sense to say away from the GTS tune. So have you run 1/4 mph times with yours yet?

No, not yet. I just got my BM3 license. Planning to do those measurements (stock vs tuned) soon.

[AlpsRider]

Originally Posted by cntzl

No, not yet. I just got my BM3 license. Planning to do those measurements (stock vs tuned) soon.

I'm looking forward to your test results. Are you going to try some tests using higher octane fuel such as VP racing? I've been using 70% Shell V-Power 91 with 30% VP Racing 100. It has made a difference although it is $$$.

[M-Pilot]

Originally Posted by AlpsRider

I'm looking forward to your test results. Are you going to try some tests using higher octane fuel such as VP racing? I've been using 70% Shell V-Power 91 with 30% VP Racing 100. It has made a difference although it is $$$.

I have access to 100oct at one of the gas stations nearby but I'll probably focus on 91oct results initially. 60-130mph is a very good indicator of what you have IMO. Still need a dragy tho. Another test I'm planning to do is to track it at Laguna (both with stock and CS tune). I have some data points from my M4 Comp at Laguna as well so it'll be a nice comparison

[AlpsRider]

Originally Posted by cntzl

I have access to 100oct at one of the gas stations nearby but I'll probably focus on 91oct results initially. 60-130mph is a very good indicator of what you have IMO. Still need a dragy tho. Another test I'm planning to do is to track it at Laguna (both with stock and CS tune). I have some data points from my M4 Comp at Laguna as well so it'll be a nice comparison

I'm curious to know how the M2C is able to "put the power down" with these tunes. Obviously increasing tire size would help a lot. M3/M4 drivers have complained of too much low end torque with MDM or traction off. I had a situation with my car while running 30% 100. I was in MDM Sport+ driving up an on-ramp on a dry warm day. I nailed it in the 5k rpm range just before entering the freeway at about 60mph. I went over a few road moguls which sent the rear end spinning way out. It happened fast! I maintained control with correction but it fish tailed back and forth a few times before it finally locked traction. You have to respect all that torque!

[M-Pilot]

Originally Posted by AlpsRider

I'm curious to know how the M2C is able to "put the power down" with these tunes. Obviously increasing tire size would help a lot. M3/M4 drivers have complained of too much low end torque with MDM or traction off. I had a situation with my car while running 30% 100. I was in MDM Sport+ driving up an on-ramp on a dry warm day. I nailed it in the 5k rpm range just before entering the freeway at about 60mph. I went over a few road moguls which sent the rear end spinning way out. It happened fast! I maintained control with correction but it fish tailed back and forth a few times before it finally locked traction. You have to respect all that torque!

265 rear isn't enough even for the stock tune. You have to modulate the throttle in the 1st and 2nd gear. 295 PS4S was amazing on my M4 Comp which had the same torque as the M2C but about 40HP more. I could just floor it in any gear (except 1st gear) without any wheel spin when the tires are warm. Another thing to mention is the traction control when it comes to putting the power down. A lot of M3/M4 owners think the car cannot put the power down mainly because majority of them use either full DSC on or MDM. Traction control software on M3/M4 is absolutely horrible especially compared to M2C. Even MDM interferes so easily (even when there is no hint of wheel spin). Therefore, I found driving DSC fully off was much better in terms smooth power delivery on my M4. M2C is a whole different story tho. Couple weeks ago I decided to push the boundaries of MDM on a damp parking lot. I could get really sideways before MDM flashes and starts doing something. I love the traction control of M2C. It's so much better than what I had in the M4. I still use DSC off for the most part but seeing such big improvements in MDM and full DSC modes was a nice surprise.

[Fenerbahce]

I’m surprised by the number of people indicating they turn DSC fully off on the street. If MDM feels too restrictive, it’s probably because you are driving too recklessly for public roads.

Anyway, I wonder if the shorter wheel base noticeably helps with weight transfer under acceleration, and consequently putting the power down? Maybe that makes up for slightly narrower tires than m3/m4.

[M-Pilot]

Originally Posted by Fenerbahce

I’m surprised by the number of people indicating they turn DSC fully off on the street. If MDM feels too restrictive, it’s probably because you are driving too recklessly for public roads.

Anyway, I wonder if the shorter wheel base noticeably helps with weight transfer under acceleration, and consequently putting the power down? Maybe that makes up for slightly narrower tires than m3/m4.

Just because you turn DSC off doesn't mean you are going sideways or smoking rear tires everywhere. I wouldn't recommend DSC off to anyone who has no prior racing or HPDE experience. The street isn't the place to turn DSC fully off for the very first time. It took me a professional racing school and a few track days to finally be able to turn DSC fully off both on and off the street. Also, everytime DSC light flashes in the dash doesn't mean you are being reckless or pushing it beyond its limits. If you haven't driven an M3/M4, go drive one especially with an older software. Even the slightest throttle input can cut the power abruptly. DSC off is in fact teaches you how to respect the car and be more responsible. A lot of the time, people do stupid stuff such as flooring or causing significant weight transfer mid corner by thinking DSC will eventually save them anyway. Sometimes it does sometimes it doesn't. I have seen people spin and total their Ms with DSC fully on in the rain or on imperfect roads. When DSC is off, you are more aware of the situation knowing there is no safety net aside from your skills. Anyways... As I said, turning DSC off for the very first time and experimenting isn't something that should be done on the street. However, I enjoy the car so much more when it's off while not deiving anywhere near the limit.

[AlpsRider]

My stock M235i had a very intrusive traction control, even in semi traction mode. The behavior was obvious even in normal everyday driving. The car would twitch mid turn and cut the power so often that I couldn't take it anymore. I upgraded to the Dinan spec 19s with 235/265 MPS 4S tires which helped a lot. Unfortunately during spirited driving I still had to use the DSC off mode for the car to feel free.
Conversely my M2C doesn't exibit any obvious "nanny" intrusions like my M235i did. Many people had been hacking their US model cars to the Euro traction specs. Maybe BMW wised up with the M2C with a much looser traction control. As I stated earlier in this thread, in MDM the car allows quite a bit of sliding. It is so free that in the rare slippery conditions that we get here I leave the traction on.