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      02-22-2019, 07:22 PM   #1
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S55 CS Tune Options

Like many I am considering adding a bit of power to my m2C. The CS level tune seems to fit the bill for our cars IMO. Obviously this tune is designed for an m4, and an m4 with a different oil capacity.

It appears that BM3, BPM, VF, and Alpine offer a CS tune. I’m wondering if these are loose replicas of the OEM software, or actual CS software that has been adapted to the oil capacity of our cars. I spoke to BPM briefly and he assured me that their tune is “factory.” Not sure about others. Obviously I’d prefer as close to OEM as possible as opposed to CS like. Apparently the OEM CS map is dialed in very nicely.

I’m no expert and simply seeking input and suggestions as I am close to completing my 1,200 mile break in.
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      02-22-2019, 07:38 PM   #2
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As far as I know, only BM3 and BPM offers oem CS map. I also know BPM modifies certain parameters so that it takes the different oil level into account. Haven't read much about how BM3 handles the different oil level situation but I assume they take care of this as well. I haven't bought a tune from any vendors and I'm not affiliated with any of them but I would either go with BM3 or BPM.
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      02-22-2019, 08:15 PM   #3
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Thanks. Big price difference between the BPM and BM3.
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      02-22-2019, 11:33 PM   #4
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Quote:
Originally Posted by jdub486 View Post
Like many I am considering adding a bit of power to my m2C. The CS level tune seems to fit the bill for our cars IMO. Obviously this tune is designed for an m4, and an m4 with a different oil capacity.

It appears that BM3, BPM, VF, and Alpine offer a CS tune. I’m wondering if these are loose replicas of the OEM software, or actual CS software that has been adapted to the oil capacity of our cars. I spoke to BPM briefly and he assured me that their tune is “factory.” Not sure about others. Obviously I’d prefer as close to OEM as possible as opposed to CS like. Apparently the OEM CS map is dialed in very nicely.

I’m no expert and simply seeking input and suggestions as I am close to completing my 1,200 mile break in.
Engine oil capacity are the same between the M4 and the M2C. Both 6.5 litre
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      02-23-2019, 12:12 AM   #5
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Quote:
Originally Posted by Karmic Man View Post
Engine oil capacity are the same between the M4 and the M2C. Both 6.5 litre
Looks like M4 GTS and M3 CS has an oil capacity of 7l while the rest (M2C, M3, M4, and M4 CS) has 6.5l.

Edit: I think the right word is 'quantity' not 'capacity' but regardless M3 CS and M4 GTS seem to have a higher oil quantity than the rest of the S55 family.

Last edited by M-Pilot; 02-23-2019 at 12:19 AM..
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      02-23-2019, 04:52 AM   #6
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Quote:
Originally Posted by cntzl View Post
Looks like M4 GTS and M3 CS has an oil capacity of 7l while the rest (M2C, M3, M4, and M4 CS) has 6.5l.

Edit: I think the right word is 'quantity' not 'capacity' but regardless M3 CS and M4 GTS seem to have a higher oil quantity than the rest of the S55 family.
Yes, I looked into it and the GTS at least has a longer oil level sensor which allows it to run an extra 0.5L of oil even though the oil pan capacity is the same.

If the M3 CS needs 7L of oil with filter then I would assume the M4 CS would be the same otherwise there would be 2 versions of CS tune.

I don't think the 0.5L would account for much in terms of potentially screwing up the oil level warning mechanism but looks like BPM already did some adjustment to account for it. Not sure about BM3 yet

https://f80.bimmerpost.com/forums/sh...447224&page=22
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      03-04-2019, 03:56 PM   #7
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As i looked into realoem and compared both M2 Comp oil stuff and Mx CS oil stuff, i feel that there are three differences between them.

Mx CS (or GTS) has different oil pan (by different part number) than M2 Comp (and other similar S55 variants)

Mx CS (or GTS) has different oil level sensor (by different part number) than M2 Comp (and other similar S55 variants)

Mx CS (or GTS) has spacer ring and o-ring (by different part number) than M2 Comp (and other similar S55 variants)

Part numbers for CS
oilpan: 11137838706
oillevel sensor: 12618638755
spacer ring: 11137857266
o-ring: 11139909334

Part number for M2 Comp
oilpan: 11137854463
oillevel sensor: 12618608780
spacer ring: na
o-ring: na
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      03-04-2019, 04:34 PM   #8
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Quote:
Originally Posted by jdub486 View Post
Thanks. Big price difference between the BPM and BM3.
Dumb question but is BPM more or less than BM3?
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      03-04-2019, 11:14 PM   #9
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BPM is more.
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      03-07-2019, 07:52 PM   #10
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People seem to throw around the acronym “OEM” when talking about these aftermarket tunes, but I’m not sure everyone knows what that actually means. Neither BM3 nor BPM is an “Original Equipment Manufacturer” to BMW.

Are these tunes exactly the same tune as that used by BMW, or are these simply each tuner’s effort to create a map that’s as close to the BMW version as possible? I’ve researched but can’t find a clear answer. It seems like these are more like an approximation rather than actual CS tunes, correct?

Last edited by Fenerbahce; 03-07-2019 at 09:19 PM.. Reason: Typo
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      03-07-2019, 08:23 PM   #11
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Quote:
Originally Posted by Fenerbahce View Post
People seem to throw around the acronym “OEM” when talking about these aftermarket tunes, but I’m not sure everyone knows what that actually means. Neither BM3 or BPM is an “Original Equipment Supplier” to BMW.

Are these tunes exactly the same tune as that used by BMW, or are these simply each tuner’s effort to create a map that’s as close to the BMW version as possible? I’ve researched but can’t find a clear answer. It seems like these are more like an approximation rather than actual CS tunes, correct?
I believe its an approximation but I will have the experts comment.

What if BPM or BM3 take an actual M3 CS flash backup on that car and restore this flash backup to a non CS M3. Will this be considered an OEM CS tune?

Hopefully BPM or BM3 can answer these questions.
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      03-07-2019, 09:11 PM   #12
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I assumed it was the real cs map, but now yall got me worried
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      03-07-2019, 09:33 PM   #13
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I’m aware that neither are OE providers. But are they simply copying or replicating the tables from a cs? Or taking the actual file and modifying the oil capacity? At this point, l’ll probably wait for the m2 cs to come out and see if that tune becomes avail.
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      03-08-2019, 12:39 AM   #14
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Quote:
Originally Posted by chmura View Post
Quote:
Originally Posted by Fenerbahce View Post
People seem to throw around the acronym "OEM" when talking about these aftermarket tunes, but I'm not sure everyone knows what that actually means. Neither BM3 or BPM is an "Original Equipment Supplier" to BMW.

Are these tunes exactly the same tune as that used by BMW, or are these simply each tuner's effort to create a map that's as close to the BMW version as possible? I've researched but can't find a clear answer. It seems like these are more like an approximation rather than actual CS tunes, correct?
I believe its an approximation but I will have the experts comment.

What if BPM or BM3 take an actual M3 CS flash backup on that car and restore this flash backup to a non CS M3. Will this be considered an OEM CS tune?

Hopefully BPM or BM3 can answer these questions.
It's not an approximation. When you unlock your DME they can and do take a backup of your oem tune so that you can flash back to stock. They basically took a backup of a M3/M4 CS at some point and now offee it for public consumption with some mandatory modifications such as oil level measurements etc. In other words, BM3 and BPM are the only tuners that I know to provide oem CS map.
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      03-08-2019, 02:28 AM   #15
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BMW DME files can be dumped by having ISTA+ programming files.

What these tuners do is take the Calibration data of the tables that matter apply it it to your car with the SWFL versions appropriate for your car so it doesn’t trigger FSC checks.

So essentially it’s as close to OEM as possible.
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      03-08-2019, 07:52 AM   #16
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So, for clarification, does BM3 adjust the oil capacity with the CS map?

In you all's opinion, is it 100% safe to run the CS map on our M2Cs?
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      03-08-2019, 09:17 AM   #17
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There are still a lot of unknowns with aftermarket tuning. There are 200 parameters that needs to be adjusted per vehicle. I sincerely doubt the aftermarket tuners addresses all of them..

Yes, you do get more power because they do alter the appropriate channels to address boost load and timing but at what long term cost to the motor's efficiency..

Alls I'm saying is proceed with caution with these tunes..
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      03-08-2019, 10:32 AM   #18
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Quote:
Originally Posted by cntzl View Post
It's not an approximation. When you unlock your DME they can and do take a backup of your oem tune so that you can flash back to stock. They basically took a backup of a M3/M4 CS at some point and now offee it for public consumption with some mandatory modifications such as oil level measurements etc. In other words, BM3 and BPM are the only tuners that I know to provide oem CS map.
If this is the case, that's great. However, I'm having trouble reconciling this statement to the fact that BM3 released a "CS" tune, and then later renamed it "CS+" and replaced their original version with another "CS" tune that was supposed to match the actual BMW tune. Perhaps I'm misunderstanding all of this, but it seems very wishy-washy . I can't help but think they just release a mild tune that nets approximately 40hp and call it a CS. I hope that's not the case, but unless BM3 and BPM say exactly how they create the tunes, it's hard to be sure. Apologies if this has already been confirmed.
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      03-08-2019, 10:52 AM   #19
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Quote:
Originally Posted by Fenerbahce View Post
Quote:
Originally Posted by cntzl View Post
It's not an approximation. When you unlock your DME they can and do take a backup of your oem tune so that you can flash back to stock. They basically took a backup of a M3/M4 CS at some point and now offee it for public consumption with some mandatory modifications such as oil level measurements etc. In other words, BM3 and BPM are the only tuners that I know to provide oem CS map.
If this is the case, that's great. However, I'm having trouble reconciling this statement to the fact that BM3 released a "CS" tune, and then later renamed it "CS+" and replaced their original version with another "CS" tune that was supposed to match the actual BMW tune. Perhaps I'm misunderstanding all of this, but it seems very wishy-washy . I can't help but think they just release a mild tune that nets approximately 40hp and call it a CS. I hope that's not the case, but unless BM3 and BPM say exactly how they create the tunes, it's hard to be sure. Apologies if this has already been confirmed.
No, you are right. That wasn't a nice move by them. Back when they didn't have CS+, I asked in their thread several times that if their CS was an approximation or not. A few people answered saying yes but never got an answer officially from BM3. After they announced CS+, I asked again and this time the owner Dzenan along with other folks from BM3 confirmed CS+ is their approximation and the currenr CS is the oem map. On the other hand, BPM has always been been 100% transparent with their stuff in terms of not only what they provide but also how things work etc. Only way to know if these are oem maps or not is to basically compare the tables. However, at this point I'm pretty confident that these two companies offer the oem CS map.
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      03-08-2019, 11:01 AM   #20
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Quote:
Originally Posted by Fenerbahce View Post
Quote:
Originally Posted by cntzl View Post
It's not an approximation. When you unlock your DME they can and do take a backup of your oem tune so that you can flash back to stock. They basically took a backup of a M3/M4 CS at some point and now offee it for public consumption with some mandatory modifications such as oil level measurements etc. In other words, BM3 and BPM are the only tuners that I know to provide oem CS map.
If this is the case, that's great. However, I'm having trouble reconciling this statement to the fact that BM3 released a "CS" tune, and then later renamed it "CS+" and replaced their original version with another "CS" tune that was supposed to match the actual BMW tune

Good point. It has not been confirm how they generate these numbers because they don't share trade secrets..

I respect that but it's pretty obvious they just copy the factory parameters and make changes to certain channels to increase the boost load, etc - and voila - 'CS tune..'

With a turbo-charged set up that is software driven, anyone with a laptop and half a brain can add power when the ECU's firewall is unlocked.

Think of it like a DJ at the party remixing your favorite song by speeding it up and lowering then tempo.. Same base tune but a different beat i.e. 'CS remix..'
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      03-09-2019, 12:11 AM   #21
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Quote:
Originally Posted by Poochie View Post
There are still a lot of unknowns with aftermarket tuning. There are 200 parameters that needs to be adjusted per vehicle. I sincerely doubt the aftermarket tuners addresses all of them..

Yes, you do get more power because they do alter the appropriate channels to address boost load and timing but at what long term cost to the motor's efficiency..

Alls I'm saying is proceed with caution with these tunes..
200? No, there's much more than that.
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      03-09-2019, 12:35 AM   #22
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Quote:
Originally Posted by cookiesowns View Post
Quote:
Originally Posted by Poochie View Post
There are still a lot of unknowns with aftermarket tuning. There are 200 parameters that needs to be adjusted per vehicle. I sincerely doubt the aftermarket tuners addresses all of them..

Yes, you do get more power because they do alter the appropriate channels to address boost load and timing but at what long term cost to the motor's efficiency..

Alls I'm saying is proceed with caution with these tunes..
200? No, there's much more than that.
My bad, I read from BM3 and Dinan that there are about 100 - 200 channels per ECU..

I guess I stand corrected..
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