[Blue Hornet]

First of all, congrats to any of you with a 2025 G87 on the way...

I'm mildly annoyed that the rumors were true, in that the 2025 G87 will receive a significant power bump. So soon! My 2023 is an automatic which means an even bigger bump (the torque figure) is coming.

Due to some prior experiences with tuning, BMW cracking down and the fact that I bought this car with the intent to hold on to it for many years, I had decided against tuning the car in any way. So now I'm wondering if there was a way to get BMW to update mine to 2025 specs. Correct me if I'm wrong, but besides software there don't appear to be any changes to the drivetrain, so it would be great if BMW could make this happen and continue to honor the factory warranty.

Any thoughts or experience with this? Thanks in advance.

-BH

[rdriggett]

Dealers and BMW will not upgrade your stock tune. Your options are getting an aftermarket tune or trading in.

[Montaver]

Put some Fabspeed HFC headers on, should net around 20hp

[JMcLellan]

Originally Posted by Blue Hornet

First of all, congrats to any of you with a 2025 G87 on the way...

I'm mildly annoyed that the rumors were true, in that the 2025 G87 will receive a significant power bump. So soon! My 2023 is an automatic which means an even bigger bump (the torque figure) is coming.

Due to some prior experiences with tuning, BMW cracking down and the fact that I bought this car with the intent to hold on to it for many years, I had decided against tuning the car in any way. So now I'm wondering if there was a way to get BMW to update mine to 2025 specs. Correct me if I'm wrong, but besides software there don't appear to be any changes to the drivetrain, so it would be great if BMW could make this happen and continue to honor the factory warranty.

Any thoughts or experience with this? Thanks in advance.

-BH

I share the same sentiment as you. I took delivery of my car in January and then it was only a matter of weeks until it was widely known the 2025's would get a power increase. Now that the details have been reported I'm less ticked about the 20HP increase (I have a 6mt so torque stays the same) and more pissed about the "advances in throttle mapping to make the car more responsive"....To me peak horsepower is one thing but if the factory tune now makes the car quicker and more responsive through the revs that can make the car feel a lot different. I really hope there is an opportunity to have a 23 or 24 M2 do a side by side dyno comparison with a 25 to see what the graphs look like. If someone here locally gets one in the coming months I will try to coordinate a dyno day.

I'm holding off until next summer to do a piggyback tune and hoping between now and then there is more feedback and advice out there from other people experimenting with the G87. Coming from a M240i with the B58 and multiple iterations of tuning and experienced zero issues with the car, I feel confident about throwing a tuning box on the G87 and pushing another 80 to 90 HP out of it.

[JMcLellan]

Originally Posted by M2siast

Y

No word on a power pack from BMW, I think that would be a first, so not impossible.

What about when BMW offered the MPPSK (spelling?) for some of their cars? I feel like it was a pretty common thing for people getting F series 340's. I don't know enough to recall if that was only added to the build of the car, or if it could be added at the dealer post-purchase.

[Blue Hornet]

Thanks for all of your input. Seems that, as expected, I would have to do an aftermarket tune (as for any exhaust mods, I'll pass on that) to get some more power.

Doing some research I came across this: https://carbahn.com/product/cbprc-00...2-at-rwd-2021/

Seems to be pretty much the same as the other piggyback tunes out there, BUT, it appears that they will match the OEM powertrain warranty as well. This, along with the fact that it's not trying to squeeze maximum power out of the car would alleviate my concerns regarding warranty and durability issues.

Any thoughts on this?

[Blue Hornet]

Awwww.....fuggit. I'll stick with Plan A and keep it bone stock. Maybe I'll get some stickier tires and try to make up the difference that way. Going to need some soon anyway...

-BH

[M_Power Rob]

Originally Posted by Blue Hornet

Awwww.....fuggit. I'll stick with Plan A and keep it bone stock. Maybe I'll get some stickier tires and try to make up the difference that way. Going to need some soon anyway...

-BH

Dor driving on the street, "sticker" tires ir drag radials are for just as they are described, drag racing. To make them effective, you will need to heat them up ala a burnout (not really that practical for street driving a stock car).

For spirited street driving, PS4S or Cup 2 are your best bet. This will keep the car better planted at high speeds dor extended time (drag radials do not do well under these circumstancesas they will tend to float). Keep in mind, drag racing is a fast run to reach best speeds, 8-11 seconds depending on the car's build, and then you are off the gas.

I just had my car re-tuned with multiple maps...my tuner even said the car was scary floating when running through the gears at 197mph (he said car had more in it but was not taking the chance with the tires floating). Car is on Nitto 555R2s.

[NewToM]

Originally Posted by M_Power Rob

Dor driving on the street, "sticker" tires ir drag radials are for just as they are described, drag racing. To make them effective, you will need to heat them up ala a burnout (not really that practical for street driving a stock car).

For spirited street driving, PS4S or Cup 2 are your best bet. This will keep the car better planted at high speeds dor extended time (drag radials do not do well under these circumstancesas they will tend to float). Keep in mind, drag racing is a fast run to reach best speeds, 8-11 seconds depending on the car's build, and then you are off the gas.

I just had my car re-tuned with multiple maps...my tuner even said the car was scary floating when running through the gears at 197mph (he said car had more in it but was not taking the chance with the tires floating). Car is on Nitto 555R2s.

He got your car up to 197?!

[M_Power Rob]

Originally Posted by NewToM

He got your car up to 197?!

Yup, on E40 blend...and there was more in it (he said would have probably peaked st 205-210).

[NewToM]

Originally Posted by M_Power Rob

Yup, on E40 blend...and there was more in it (he said would have probably peaked st 205-210).

Hats off to you guys.

[WBRacing]

Originally Posted by M_Power Rob

Dor driving on the street, "sticker" tires ir drag radials are for just as they are described, drag racing. To make them effective, you will need to heat them up ala a burnout (not really that practical for street driving a stock car).

For spirited street driving, PS4S or Cup 2 are your best bet. This will keep the car better planted at high speeds dor extended time (drag radials do not do well under these circumstancesas they will tend to float). Keep in mind, drag racing is a fast run to reach best speeds, 8-11 seconds depending on the car's build, and then you are off the gas.

I just had my car re-tuned with multiple maps...my tuner even said the car was scary floating when running through the gears at 197mph (he said car had more in it but was not taking the chance with the tires floating). Car is on Nitto 555R2s.

Are you running any aftermarket aero to help with downforce? Stock height? I have concerns about floating after getting mine tuned this winter

[M_Power Rob]

Originally Posted by WBRacing

Are you running any aftermarket aero to help with downforce? Stock height? I have concerns about floating after getting mine tuned this winter

TRE-01 rear spoiler. Lowered all the way on MP HAS. My tuner was adament and said to get rid of the drag radials for the street with the tune. He also said to go to coils...Ohlins are in my future.

[DutchBoysRacing]

Hear me out...lets wait to see someone dyno the new car. Most people are showing ~450-460 Wheel HP (the same as the M3/M4) which is about 530 crank hp.

So I imagine the "upgrade" won't actually add power but be closer to advertised HP.

[BroDoze]

Originally Posted by DutchBoysRacing

So I imagine the "upgrade" won't actually add power but be closer to advertised HP.

Incorrect. You all keep saying this. It’s false.

Originally Posted by M2siast

New cars will dyno 20hp higher than ours.

Correct.

[M_Power Rob]

Originally Posted by M2siast

New cars will dyno 20hp higher than ours.

Depending on the mapping snd the powerband, the 20hp increase may be barely negligible. The ~40 torque increase in the 8AT will be where the most discernable change will be.

[DutchBoysRacing]

Originally Posted by BroDoze

Incorrect. You all keep saying this. It’s false.



Correct.

Is there a source for this? The first part of my comment was "lets wait and see the dyno" but from a "lets trust what BMW says" position it seems that all of our cars would be making 380 wheel HP

[Racerjbx]

Is it actually an increase or are they just now claiming the HP that people dyno. I am confused since the current M2 dyno at 20hp more than what BMW advertised. This 2025 will have the same power just more accurate in what BMW advertised.

Probably won't know until someone puts a stock 2025 on the dyno

[c1pher]

Didn’t Toyota remap the first year BMW Supras after they increased the output on the later Supras because so many complained? Maybe I’m misremembering.

[DutchBoysRacing]

Originally Posted by M2siast

BMW is showing the increase in the range maximum torque is achieved, thus increasing horsepower. It’s pretty cut and dry without much room for interpretation. It’s increased power vis-a-vis the outgoing models, using the same baseline.

BMW never said our cars would be making 380 hp. It’s a wrongful interpretation of data that ends up with the word “underrated” being thrown out constantly, which is also incorrect. BMW rates the engines to the power they advertise, “tuners” are the ones who interpret it as “underrated”.

BMW did say this by advertising the hp numbers. When they say the car makes 453 "maximum hp" (not whp btw; source: bmwusa.com) that translates to 380-388 whp roughly. Since our cars are making 450-460 whp, the actual HP is closer to 520hp.

So they are advertising the car as "x hp" when really its "x + 80whp". That's why everyone is saying they are "under rating" their cars. But surely they didn't do the same thing with the M4 CSL (source: bmwblog.com) But at least the M5 CS was accur- oh wait...

I get why they do this, if they advertise far under the actual number, no one gets upset if their car makes 30+ hp over advertised, but people would lose their shit if the car was 30- their advertised numbers. Oh isn't marketing grand.

That means the 20HP increase would need to bring the to an advertised 473 HP, which translates to 400whp. Still about 55 wheel HP off or about.

Not trying to be combative but when BMW advertises a number, and then multiple independent sources prove that number is actually way higher than they are advertising, its pretty fair to say they are under rating their cars. Especially since this is not the only car they do this for.

One might even argue that there is no difference in power between the M2/M3/M4 as the dyno results show an identical power band (within a standard margin in error) on the dyno. So the claim the M2 was "de-tuned" was also apparently a false claim.

So for a fact we know that:
1. they were "misleading" about the current M2 HP numbers
2. they "misleading" about de-tuning the m2 engine
3. they have been "misleading" about other M models performance figures