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      08-09-2018, 06:13 PM   #1
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M2 Competition Engine Tuning

I started this thread to stir up interest in the tuning community for the M2C. Even though in theory M3/M4 tuning should work fine with the S55 in the M2C. It would be nice to see some tunes designed for our cars. Flash tunes may have some small differences. I'm looking forward to a M2C to CS tune.
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      08-10-2018, 03:19 AM   #2
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Me too.
Also because us Euros have the OPF issue.
And the rest of the S55 threads is 9 out of 10 times about US based tuning companies imo.

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      08-10-2018, 02:25 PM   #3
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Here are a few links to M3/M4 Flash and Dinan tune discussions from their forum.

BM3
https://f80.bimmerpost.com/forums/sh....php?t=1523073

https://f80.bimmerpost.com/forums/sh....php?t=1321851

BPM
https://f80.bimmerpost.com/forums/sh....php?t=1447224

Dinan
https://f80.bimmerpost.com/forums/sh....php?t=1519521
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      08-11-2018, 01:42 PM   #4
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I'd be more than happy to tune some M2C ( s55 ) on bm3 or MHD. Given that I own a M2 myself I know how these owners wish their car to drive.

Unlike the brute force nature of most S55 tunes on M3/M4.
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      08-14-2018, 03:20 AM   #5
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Quote:
Originally Posted by cookiesowns View Post
I'd be more than happy to tune some M2C ( s55 ) on bm3 or MHD. Given that I own a M2 myself I know how these owners wish their car to drive.
Looking at your sig, what benefits did you get going for BM3 custom tune over OTS ?

I have M2 here in the UK and am considering BM3 platform in combination with F82 GTS MDM, ePAS and M Diff FW flashes....any advice welcome.
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      08-15-2018, 01:28 AM   #6
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Quote:
Originally Posted by Bee Pee View Post
Looking at your sig, what benefits did you get going for BM3 custom tune over OTS ?

I have M2 here in the UK and am considering BM3 platform in combination with F82 GTS MDM, ePAS and M Diff FW flashes....any advice welcome.
My own custom mapping. Because I'm on stock DP, stage 2 was just a teeny bit aggressive for my taste on stock DP.

Now, I have proper throttle tables, different spool characteristics of the car, and I've limited torque a bit in lower RPM's as I prefer a more linear feel. Timing is also adjusted for my particular fuel in my area ( ACN91 )

Overall I feel a more consistent map for my tastes.

OP: I have all the files for the M2 S55 including the ones with OPF in the EU market. Will spend time digging more into them soon. There's also been a new rom release for S55 as of 2018 08.
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      08-15-2018, 02:01 AM   #7
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G Power has a nice offer for us Euros:
https://www.g-power.com/benoetigt-de...00-ps_4811.php

500PS for > €1800,00 inc labour.

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      08-15-2018, 02:43 AM   #8
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MS Tuning, also in Germany:
https://ms-tuning.de/chiptuning/date...ujahr=7366-F87 - 2016 -> ...&modell=10075-M2 Competition&leistung=410

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      08-15-2018, 06:59 AM   #9
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Go with Bootmod3 and their latest S55 OTS are now much improved than ever (especially throttle and I'm able to WOT from 35-40mph 2nd gear and not spin with dsc off) cookiesowns if u desire a custom map
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      08-21-2018, 04:38 PM   #10
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Yesterday I drove a friend's f80 M3 running BM3 with a full e85 tune. His car is DCT.

In comparison to my 6 speed M2 running the BM3 stage 2 e30 map, it is SCARY fast!

The torque delivery is so instant which I loved, but it's also extremely brutal on the e85 map.

I honestly think it's too much power. Can't believe I'm saying that.

M2C with stage one is probably a far more sensible choice. I also found his exhaust too loud in Sport+. It just had dump pipes and a single mid pipe conversion, similar to the AA one.
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      08-21-2018, 04:41 PM   #11
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Quote:
Originally Posted by Oxymoron View Post
Yesterday I drove a friend's f80 M3 running BM3 with a full e85 tune. His car is DCT.

In comparison to my 6 speed M2 running the BM3 stage 2 e30 map, it is SCARY fast!

The torque delivery is so instant which I loved, but it's also extremely brutal on the e85 map.

I honestly think it's too much power. Can't believe I'm saying that.

M2C with stage one is probably a far more sensible choice. I also found his exhaust too loud in Sport+. It just had dump pipes and a single mid pipe conversion, similar to the AA one.
What mods and power u making on your m2? I have Rk tunes on my m2 but still want more, I thought our cars couldn’t handle e85?
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      08-21-2018, 06:04 PM   #12
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There's an OTS map for 30% ethanol. Makes another 15hp or so above the normal stage 2 OTS map. It's great! Although in colder temps you will hit the limit of the hpfp.

I'm running the usual stage 2 mods. DP, Wagner IC and CP
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      08-21-2018, 06:22 PM   #13
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Quote:
Originally Posted by Oxymoron View Post
Yesterday I drove a friend's f80 M3 running BM3 with a full e85 tune. His car is DCT.

In comparison to my 6 speed M2 running the BM3 stage 2 e30 map, it is SCARY fast!

The torque delivery is so instant which I loved, but it's also extremely brutal on the e85 map.

I honestly think it's too much power. Can't believe I'm saying that.

M2C with stage one is probably a far more sensible choice. I also found his exhaust too loud in Sport+. It just had dump pipes and a single mid pipe conversion, similar to the AA one.
I plan to do a stage one on my M2C. I also plan to get the 763M wheels with 255/275 MPS S4 tires. I hope that will be a good compromise of more power with more rubber. I'm still waiting to see if there will be a tune specifically for the M2C. I wonder if it really matters?
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      08-22-2018, 12:43 PM   #14
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Originally Posted by AlpsRider View Post
I plan to do a stage one on my M2C. I also plan to get the 763M wheels with 255/275 MPS S4 tires. I hope that will be a good compromise of more power with more rubber. I'm still waiting to see if there will be a tune specifically for the M2C. I wonder if it really matters?
"A tune specifically for M2C" is like saying a tune specifically for M4 Comp or M4 CS. As long as the S55 in M2C shares the exact same hardware as the S55 in M4 ZCP, CS etc., I don't see why it should matter. However, those tire sizes you mentioned aren't wide enough for good traction with a stage 1 tune, just FYI. Stock Non-ZCP M4 has 425HP and a lot of people experience traction issues even on the stock map with 275s in the rear. BM3 now offers torque limiting by gear so you would probably have to cut the torque down significantly on 1st, 2nd and even maybe 3rd gear if you decide go with stage 1 and 275s. I recommend going at least 285 in the rear.
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      08-22-2018, 01:19 PM   #15
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Quote:
Originally Posted by cntzl View Post
"A tune specifically for M2C" is like saying a tune specifically for M4 Comp or M4 CS. As long as the S55 in M2C shares the exact same hardware as the S55 in M4 ZCP, CS etc., I don't see why it should matter. However, those tire sizes you mentioned aren't wide enough for good traction with a stage 1 tune, just FYI. Stock Non-ZCP M4 has 425HP and a lot of people experience traction issues even on the stock map with 275s in the rear. BM3 now offers torque limiting by gear so you would probably have to cut the torque down significantly on 1st, 2nd and even maybe 3rd gear if you decide go with stage 1 and 275s. I recommend going at least 285 in the rear.
I was looking to jump on some 305 PS4S, I wonder if that'll tuck fine on the 19x10s.
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      08-22-2018, 01:45 PM   #16
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Quote:
Originally Posted by FSU_Logan View Post
Quote:
Originally Posted by cntzl View Post
"A tune specifically for M2C" is like saying a tune specifically for M4 Comp or M4 CS. As long as the S55 in M2C shares the exact same hardware as the S55 in M4 ZCP, CS etc., I don't see why it should matter. However, those tire sizes you mentioned aren't wide enough for good traction with a stage 1 tune, just FYI. Stock Non-ZCP M4 has 425HP and a lot of people experience traction issues even on the stock map with 275s in the rear. BM3 now offers torque limiting by gear so you would probably have to cut the torque down significantly on 1st, 2nd and even maybe 3rd gear if you decide go with stage 1 and 275s. I recommend going at least 285 in the rear.
I was looking to jump on some 305 PS4S, I wonder if that'll tuck fine on the 19x10s.
Max you can run on 10" wheels is 295 and that's what I'm planning to do after seeing it on couple other M2s. Even if you get wider wheels to fit 305s, you won't be able mount them on the M2 since there is no enough clearance for 305s.
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      08-22-2018, 04:20 PM   #17
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Quote:
Originally Posted by cntzl View Post
"A tune specifically for M2C" is like saying a tune specifically for M4 Comp or M4 CS. As long as the S55 in M2C shares the exact same hardware as the S55 in M4 ZCP, CS etc., I don't see why it should matter. However, those tire sizes you mentioned aren't wide enough for good traction with a stage 1 tune, just FYI. Stock Non-ZCP M4 has 425HP and a lot of people experience traction issues even on the stock map with 275s in the rear. BM3 now offers torque limiting by gear so you would probably have to cut the torque down significantly on 1st, 2nd and even maybe 3rd gear if you decide go with stage 1 and 275s. I recommend going at least 285 in the rear.
I figured that those tires would be a bit small for the power. If I go with the 285/35 though the the wheel/tire diameter increases roughly 14mm, if I go 285/30 the wheel/tire diameter decreases 14.5 mm. If I go up to 295/30s the decrease in wheel/tire diameter is only 8.5mm but is that too big for 10" wheels, will it rub with ET40 on the M2, will the tires be pinched? This also means that I need to increase the front tire size as well which would mean a similar dilemma with sizing.
https://www.willtheyfit.com/index.ph...=10&offset2=40
I want to go up in tire size but I don't want to mess with the dynamics too much otherwise I'm now looking at coil-overs to adjust ride height. I hoped to avoid buying them for awhile until I get a feel for what I think the car needs for my driving style and preference. Thoughts?
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      08-22-2018, 04:29 PM   #18
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Quote:
Originally Posted by AlpsRider View Post
Quote:
Originally Posted by cntzl View Post
"A tune specifically for M2C" is like saying a tune specifically for M4 Comp or M4 CS. As long as the S55 in M2C shares the exact same hardware as the S55 in M4 ZCP, CS etc., I don't see why it should matter. However, those tire sizes you mentioned aren't wide enough for good traction with a stage 1 tune, just FYI. Stock Non-ZCP M4 has 425HP and a lot of people experience traction issues even on the stock map with 275s in the rear. BM3 now offers torque limiting by gear so you would probably have to cut the torque down significantly on 1st, 2nd and even maybe 3rd gear if you decide go with stage 1 and 275s. I recommend going at least 285 in the rear.
I figured that those tires would be a bit small for the power. If I go with the 285/35 though the the wheel/tire diameter increases roughly 14mm, if I go 285/30 the wheel/tire diameter decreases 14.5 mm. If I go up to 295/30s the decrease in wheel/tire diameter is only 8.5mm but is that too big for 10" wheels and will it rub with ET40 on the M2? This also means that I need to increase the front tire size as well which would mean a similar dilemma with sizing.
https://www.willtheyfit.com/index.ph...#38;offset2=40
I want to go up in tire size but I don't want to mess with the dynamics too much otherwise I'm now looking at coil-overs to adjust ride height. I hoped to avoid buying them for awhile until I get a feel for what I think the car needs for my driving style and preference. Thoughts?
You can run 295s on 10" wheel without any problems. That's what many M3/M4 owners are doing. I was running 265/30/20 and 295/30/20 on my M4 (stock 666M wheels) and 295s felt better even after 285s (considering it's only a 10mm increase). Check out @m3piotr on IG. He's running 265/30/20 and 295/30/20 on his OG M2. He even lowered it couple days ago and still no rubbing. I'll do 265/30/19 and 295/30/19 on mine as the diameter change is minimal with this setup. If you still don't feel comfortable and want to get 275s for the rear, get ready for a lot of wheel spin with a stage 1 tune
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      08-22-2018, 05:48 PM   #19
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Quote:
Originally Posted by cntzl View Post
Max you can run on 10" wheels is 295 and that's what I'm planning to do after seeing it on couple other M2s. Even if you get wider wheels to fit 305s, you won't be able mount them on the M2 since there is no enough clearance for 305s.
I've ran a 305 MPPS (and now 4s) on my otther car's 10" wide wheel for 4 years now. I just wanted to make sure there would be no rub
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      08-22-2018, 08:58 PM   #20
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Quote:
Originally Posted by FSU_Logan View Post
Quote:
Originally Posted by cntzl View Post
Max you can run on 10" wheels is 295 and that's what I'm planning to do after seeing it on couple other M2s. Even if you get wider wheels to fit 305s, you won't be able mount them on the M2 since there is no enough clearance for 305s.
I've ran a 305 MPPS (and now 4s) on my otther car's 10" wide wheel for 4 years now. I just wanted to make sure there would be no rub
I strongly doubt a 305 will fit on a M2/M2C unless modifications are made. Many guys have reported rubbing issues even with 295. A custom offset with enough clearance on the inside will result in a wheel sticking out by quite a bit.
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      08-22-2018, 09:28 PM   #21
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Just came across this on the ESS Tuning website for the S55 platform. I think what they claim in regards to aftermarket exhausts and intakes is VERY interesting. If what they claim is true, I would think a lot of folks have been taken for a ride. I'm not speaking from a position claiming that I know anything whatsoever so I'm just throwing it out there to see what other members think of this.

From their website:

*This software is designed to run with OEM S55 air induction system. We have found this overall superior to anything else we have tested on the market. OEM airboxes have virtually 0 restriction and replacing them during our in house testing with an open CAI air intake setup with matched intake funnels yielded absolutely no results at all. We know several companies claim otherwise, but we have not been able to find any advantages to replacing the stock S55 airboxes. Several aftermarket intakes we have seen create MAF turbulence issues and engine operation problems.

**Most aftermarket exhaust systems we have tested on the S55 platform produces less power than the OEM exhaust, the only exhaust we have found to match the OEM in power delivery is Akrapovic.
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      08-23-2018, 12:16 AM   #22
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Quote:
Originally Posted by imyourmaster View Post

OEM airboxes have virtually 0 restriction and replacing them during our in house testing with an open CAI air intake setup with matched intake funnels yielded absolutely no results at all. We know several companies claim otherwise, but we have not been able to find any advantages to replacing the stock S55 airboxes. Several aftermarket intakes we have seen create MAF turbulence issues and engine operation problems.

**Most aftermarket exhaust systems we have tested on the S55 platform produces less power than the OEM exhaust, the only exhaust we have found to match the OEM in power delivery is Akrapovic.
Nothing new, shocking or ground breaking. At least not to me. Assuming you've bought a sports car and not a minivan, the factory airbox is designed to be as efficient as possible 'right out of the box' (no pun intended). The only benefit of an aftermarket filter/box is the subjectively cool look when you pop the hood and the whooshing sound it makes when you hit the gas. Pretty sure most people here already know this.

Also, no one that I'm aware of buys exhausts solely for the claimed 5-10 hp increase. They get them because they desire a change in sound. The "free flow" talk is just marketing as far as I'm concerned. The only real components that are super restrictive on an OEM exhaust are the cats. Any claims of power from just a catback or axelback are BS in my eyes. Unless you're removing a cat, you're spending your money on sound. Yeah, you can get some weight reduction too maybe, but only if you spend a fortune on titanium or get something without mufflers.

All that being said, I think exhausts are worth the money if they sound good/drop weight. Don't see a need to claim power. Maybe it's just a sales tactic the industry can't let go of. As for intakes...imo they're a total waste of money. I don't even change the stock filter to a thinner drop in.

Is it wrong to sell or buy intakes/exhausts for these cars? Absolutely not. Is it dishonest to market them as power adders? That's personal opinion.
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