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F80 M3 (Sedan) / F82 M4 (Coupe) / F83 M4 (Convertible) : (2015-TBD) Discuss the 5th Generation M3


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Old Tue, Jun-13-2017, 03:15:01 AM   #1
Soma3434
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Default M3 Stability under accelaration

Hi there.

I have recently bought a bmw m3 f80 . I wanted to understand other people's experience with this car with regard to stability under accelaration.

I have driven a lot of race cars and top level go karts in my time, but as far as a road going higher powered cars, ive only had an Audi TT, an Audi A5 and renault sport megane 265. The BMW m3 is obviously more power, but so far in my experience A LOT more unstable.

on a dry road, even under only 3/4 accellaration, the car tends to squirm and even hop a little bit... it really caught me by surprise as i headed up the freeway, gave it some power and felt the back slightly come round on me.

Is this how the car feels to everyone or is there something not quite right? I have all the stability turned on and was quite surprised.

I need to get it out to a race track to fully understand the handling of the car, but initially i was very surprised at this. Look forward to hearing some feedback.
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Old Sat, Sep-16-2017, 01:03:10 AM   #2
ianmason
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Default Re: M3 Stability under accelaration

Yup, it struggles with traction. I think that, poor rebound damping and a solid mounted rear sub frame lend itself to feeling a little uneasy.

I have read people putting coil overs on it and it calming down. I would also suggest moving up to 295 section rear tires to help with traction.
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Old Tue, Sep-19-2017, 05:15:36 AM   #3
StevoTheHobo
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Default Re: M3 Stability under accelaration

Yup. I've got the same issue here. I think some of it depends on road conditions as well, but I'm definitely upping the rears to 295s when it comes time to replace them.
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Old Tue, Oct-03-2017, 05:36:38 AM   #4
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Default Re: M3 Stability under accelaration

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Originally Posted by StevoTheHobo View Post
Yup. I've got the same issue here. I think some of it depends on road conditions as well, but I'm definitely upping the rears to 295s when it comes time to replace them.
DO you guys have the competition spec or normal m3. Apparently the rear skittishness was resolved largely. Also there a massive torque hump at 2-3k which causes practical traction issues. Iím getting mine tuned out with a Stage 1 ess tune.
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Old Mon, Oct-23-2017, 04:20:58 AM   #5
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Default Re: M3 Stability under accelaration

My car is a 2015 m3 with edc suspension, first time i drove the car, it was unstable as you described under hard acceleration.

I contacted alex, from alex alpine to get my edc setting coded to competition package specifications

Results were amazing, car is now very stable and drive like on coilover in sport plus edc, in comfort, itís comfortable but very stable, it really transform the car so if you have edc i highly suggest to try it, itís not expensive and Iím pretty sure it will solve your problem
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Old Thu, Oct-26-2017, 04:16:01 PM   #6
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Default Re: M3 Stability under accelaration

Add some more more rear toe in.

My stock 2015 M4 (except pads and tires) at the track does just fine under acceleration. I actually disconnect my edc cables for track days.

https://m.youtube.com/watch?t=192s&v=j5SnU43iSG8
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Old Mon, Nov-13-2017, 07:47:49 PM   #7
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Default Re: M3 Stability under accelaration

Stock 2017 with EDC.
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Old Tue, Nov-14-2017, 05:15:12 PM   #8
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Default Re: M3 Stability under accelaration

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Originally Posted by sleeprequired View Post
DO you guys have the competition spec or normal m3. Apparently the rear skittishness was resolved largely. Also there a massive torque hump at 2-3k which causes practical traction issues. Iím getting mine tuned out with a Stage 1 ess tune.
That's a good call. There's no one I'd trust more to tune my car than ESS
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Old Sat, Nov-18-2017, 01:21:55 AM   #9
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Default Re: M3 Stability under accelaration

Quote:
Originally Posted by sleeprequired View Post
DO you guys have the competition spec or normal m3. Apparently the rear skittishness was resolved largely. Also there a massive torque hump at 2-3k which causes practical traction issues. Iím getting mine tuned out with a Stage 1 ess tune.
Mine is the civic. It's the torque peak and where it comes on. Tuning isn't going to change it, if anything it makes it work. I have a Dinan tune and it definitely makes it worse, which is obvious of course. Add more power is going to naturally decrease available traction.
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Discussing M3 Stability under accelaration in the F80 M3 (Sedan) / F82 M4 (Coupe) / F83 M4 (Convertible) : (2015-TBD) Forum - Discuss the 5th Generation M3 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)