[TimothyW13]

Hi everyone, I have an M850i that I bought with 20k miles on it 6 weeks ago. I noticed it was definitely not performing as I expected since getting it. I bought a dragy and I'm reliably running a 0-60 time of about 5.0 seconds (4.9-5.3 seconds). Engine readout on the car is showing good HP and torque... above the 560 that the display caps it at.

I brought it to the dealer today and they told me, sorry, we can't see any codes... maybe the fuel that's in it isn't good enough. They suggested that I could only get a 0-60 time in the 3s if I was using launch control, not comfort or sports mode.

What do you guys think? Anyone else have this kind of problem? What might be a good course of action for me?

[NYG]

Are you getting these times with launch control?

[pz619]

I wouldn't think you would get into the 3s without launch control. I wouldn't necessary expect 5 seconds but 4s sound reasonable if you are just mashing the pedal from a standstill, without building revs.

[Neusser]

Originally Posted by TimothyW13

Hi everyone, I have an M850i that I bought with 20k miles on it 6 weeks ago. I noticed it was definitely not performing as I expected since getting it. I bought a dragy and I'm reliably running a 0-60 time of about 5.0 seconds (4.9-5.3 seconds). Engine readout on the car is showing good HP and torque... above the 560 that the display caps it at.

I brought it to the dealer today and they told me, sorry, we can't see any codes... maybe the fuel that's in it isn't good enough. They suggested that I could only get a 0-60 time in the 3s if I was using launch control, not comfort or sports mode.

What do you guys think? Anyone else have this kind of problem? What might be a good course of action for me?

Well, what fuel are you using? Sports mode should get you there, partic. if you have the tranny in sport as well.

[TimothyW13]

Hey, yah I'm using only 93 octane. All sports mode or comfort seems to have about the same result, 5.0 -5.2 seconds from stopped

[24CBX4M40i]

Those times u see published use a 1 foot roll out..so they get a running start so to speak

[Mason Hatcher]

In comfort and sport the nannies reduce engine power and apply braking to prevent wheel spin. The numbers you are getting make absolute sense.

Try launch mode and post the results.

[MineralWhiteF80]

OP, you are likely overthinking this and inventing a problem when there isn't one. It sounds like your car is running normally and the expectation of a specific 0-60mph time is not realistic.

Car manufacturers go to great lengths to post certain 0-60 times, but in reality, to get that published time, you must follow a very specific set of requirements for car setup, environment, road conditions, tire model, fuel level, density altitude, moon phase, etc. Then you have the actual measurement method of the time and when the time starts, such as the "1 foot rollout" rule.

[p0p]

Maybe Sport Mode with Traction control off and launch in 2nd -

[Mason Hatcher]

Originally Posted by p0p

Maybe Sport Mode with Traction control off and launch in 2nd -

[p0p]

Originally Posted by Mason Hatcher

Why the sarcasm?

Try it - Even some M cars will only launch control in 2nd

My F30 TCU is set to start in 2nd when warmed up.

[TimothyW13]

Originally Posted by MineralWhiteF80

OP, you are likely overthinking this and inventing a problem when there isn't one. It sounds like your car is running normally and the expectation of a specific 0-60mph time is not realistic.

Car manufacturers go to great lengths to post certain 0-60 times, but in reality, to get that published time, you must follow a very specific set of requirements for car setup, environment, road conditions, tire model, fuel level, density altitude, moon phase, etc. Then you have the actual measurement method of the time and when the time starts, such as the "1 foot rollout" rule.

I completely understand what you're saying and agree to an extent... but I find it hard to believe that a car with roughly 600 lb ft of torque and 570hp real world shouldn't be able to beat my old mustang or the genesis g80 (with roughly half the torque and hp, similar weight) that I traded in for this m850.

[TimothyW13]

Originally Posted by p0p

Maybe Sport Mode with Traction control off and launch in 2nd -

I have not tried this, I actually didn't know you could launch from 2nd, I'll see if it'll do it though! I can get as good as low 4s if I hold gas and brake for a second and then release brake, but it's really more just across the whole acceleration band when it's not a launch. Like I responded to the other guy, I feel like you'd kind of expect a flagship engine from bmw to be able to beat a mustang or a genesis across the band.

[Michael1316]

Are you using the cars actual launch control mode? You're not going to get the advertised 0-60 times if you're just mashing the throttle pedal from a standstill.

[eleven11]

Originally Posted by TimothyW13

I completely understand what you're saying and agree to an extent... but I find it hard to believe that a car with roughly 600 lb ft of torque and 570hp real world shouldn't be able to beat my old mustang or the genesis g80 (with roughly half the torque and hp, similar weight) that I traded in for this m850.

I agree with you, OP. I think you should be able to a least slip under 4 seconds without launch control.

Being a used car, I'd throw some Liqui Moly voodoo at it (Fuel/Injector/Oil cleaner - all of it) - might do nothing, but will cost you less than $100.

I'd also find a reputable independent mechanic near you, ideally one who deals with modified cars regularly. You might have a minor boost leak.

Are you slipping at all (i.e. tire grip)?

[TimothyW13]

Originally Posted by eleven11

I agree with you, OP. I think you should be able to a least slip under 4 seconds without launch control.

Being a used car, I'd throw some Liqui Moly voodoo at it (Fuel/Injector/Oil cleaner - all of it) - might do nothing, but will cost you less than $100.

I'd also find a reputable independent mechanic near you, ideally one who deals with modified cars regularly. You might have a minor boost leak.

Are you slipping at all (i.e. tire grip)?

Sweet, thanks man. Yah, I just threw in a bunch of fuel system cleaner and I haven't tested with dragy yet but it does feel a bit more responsive. It's over 90f here every day right now so it's hard to test out without temperature slowing the damn car down further.

I did think there might have been a bit of tire slip. The car came with all season run flats so I just bought some sweet Michelin pilot 4s summer tires. Really hoping that'll do something good. Thanks for the suggestion about the boost, I will follow through on that and let you know!

[Ugly Kar]

Originally Posted by eleven11

I agree with you, OP. I think you should be able to a least slip under 4 seconds without launch control.

Being a used car, I'd throw some Liqui Moly voodoo at it (Fuel/Injector/Oil cleaner - all of it) - might do nothing, but will cost you less than $100.

I'd also find a reputable independent mechanic near you, ideally one who deals with modified cars regularly. You might have a minor boost leak.

Are you slipping at all (i.e. tire grip)?

Have to agree. Even the tests you see with testers not using the rollout are only .2-.3 sec slower. And that's pretty much what I've experienced even with LC off. I wouldn't be happy if I paid M850 $ and couldn't get within .5 sec of the best magazine tester times.

[TimothyW13]

Originally Posted by Ugly Kar

Have to agree. Even the tests you see with testers not using the rollout are only .2-.3 sec slower. And that's pretty much what I've experienced even with LC off. I wouldn't be happy if I paid M850 $ and couldn't get within .5 sec of the best magazine tester times.

Thanks man, good to hear someone else who doesn't think I'm crazy for being upset about it.

[G30M]

Originally Posted by TimothyW13

Hi everyone, I have an M850i that I bought with 20k miles on it 6 weeks ago. I noticed it was definitely not performing as I expected since getting it. I bought a dragy and I'm reliably running a 0-60 time of about 5.0 seconds (4.9-5.3 seconds). Engine readout on the car is showing good HP and torque... above the 560 that the display caps it at.

I brought it to the dealer today and they told me, sorry, we can't see any codes... maybe the fuel that's in it isn't good enough. They suggested that I could only get a 0-60 time in the 3s if I was using launch control, not comfort or sports mode.

What do you guys think? Anyone else have this kind of problem? What might be a good course of action for me?

i have a M550i and with brake boost i timed it at 4.35 0-100, didn't do more as too scared to break it.

are you using brake boost?

i am presuming without brake boost it will be 5 seconds 0-100

the throttle response in every auto non hybrid BMW i've tested without brake boost is crap, even my 2007 Toyota moves off the line faster

my 2.5 tonne EV Kia however, is 3.7 0-100 every single time (did >20 runs in an hour) without brake boost and it spins all 4 wheels all the way to 100 (now winter). i will try again in summer to see if i can get another 0.2 with better traction

[bimmertricks]

Definitely need car in sports+, traction control/ dsc mode off. And transmission should be flipped in sport as well. Launch control shouldn’t need to activate to reach 3s-4s. IMO, the car definitely has some issues if you cannot do that

[G30M]

Originally Posted by bimmertricks

Definitely need car in sports+, traction control/ dsc mode off. And transmission should be flipped in sport as well. Launch control shouldn’t need to activate to reach 3s-4s. IMO, the car definitely has some issues if you cannot do that

Nah, the car doesn't move until the rpms hit 3000.

So if you don't brake boost, it will crawl slowly until it hits 3000rpm before it flies. That thing weighs a good 2 tonnes.

[G30M]

did about 6 brake boosted 0-100 in a row in my 550 on a cold frosty morning today

average 4.2s, fastest i got was 3.99s

never even bothered without brake boosting, i don't want to see the number lol

my brake boosting is to let go as soon as the revs stop climbing (around 2100rpm), so i didn't even build that much boost, just enough to give it a kick in the ass.

i feel the TC intervening in some runs so could have been faster with DTC but i don't want to be unsafe