[chris719]

I know no one has driven the M2 yet, but I was curious if anyone has driven both an m235i and an M3/M4 and could compare the throttle response?

Is the N55 similar? Is there noticeable throttle lag or "rev-hang" on lift? I notice a lot of modern cars have this rev-hang thing going on where you don't get engine braking as soon as you lift off the throttle but it's rarely mentioned in reviews. Happens to the C7 Corvette and 981 Porsches (only in non-sport).

Note that I'm not really talking about turbo lag although it might be hard to separate the two.

[Prodigy.]

Recently drove an M235i Auto and noticed a significant improvement in throttle response over my N55 135i. Hopefully the M2 will be the same if not even better.

Hopefully throttle response is the same on both Manual & DCT though as I'm considering a manual this time around.

[LinkF1]

Originally Posted by Prodigy 72

Recently drove an M235i DCT

That is unlikely, perhaps an 8AT but a 235 with DCT would be custom.

[Prodigy.]

Originally Posted by LinkF1

That is unlikely, perhaps an 8AT but a 235 with DCT would be custom.

Sorry...my mistake, yes 8sp Auto. 😊

[miiipilot]

I've worried about this too. It was very hard in my 135 to heel/toe.

I am also worried about the CDV in the M2.

[miiipilot]

I've worried about this too. It was very hard, in my 135, to heel/toe.

I am also worried about the CDV in the M2.

[E92LNGCGY]

I have the S55 and driven the N55 in the M235i. I can confirm the throttle response in S55 is much faster (especially in sport & sport +) compared to N55. S55 almost feels like NA. However I believe throttle response in the M2 will be upgraded because if the S55 is any indication I suspect the M2 response will feel like NA as well.

[JustChris]

Owned both.

The M4 throttle response in Sport and Sport plus is near instant. Pretty sure in maybe plus the turbo is permanently spooling and ready.

Saying that the M235i is damn good too, but I was the weak link there in a 6MT vs DCT in the M4.

I wouldn't be worried about N55 turbo lag at all.

[Ramos]

Throttle response is not that great in my M235 and what you describe as rev hang on throttle lift is very noticeable.

That is the main reason (not Hp) that I was very disappointed that the M2 didn't get a detuned S55

I think the twin turbos make all the difference in this case and no amount of massaging will bring the N55 to the throttle response feel of the S55

[WAY]

Own both M3 and M135i in DCT and 8 speed auto. In sports both throttle responses are very sharp. Would not worry about throttle response at all. Having said that I wouldn't compare them to my GT4. NA engines all the way!

[chris719]

Originally Posted by Ramos

Throttle response is not that great in my M235 and what you describe as rev hang on throttle lift is very noticeable.

That is the main reason (not Hp) that I was very disappointed that the M2 didn't get a detuned S55

I think the twin turbos make all the difference in this case and no amount of massaging will bring the N55 to the throttle response feel of the S55

The rev hang is not turbo related though. My Mazda 3 does it and so do the non GT naturally aspirated Porsches when in Normal mode. I think it's an emissions or fuel economy related thing. It does not go away in Sport mode on the M235i?

When I first started switching back and forth from the Mazda 3 and Z4M I would downshift and expect immediate engine braking like on the S54 but in the Mazda and many other cars now it's like the throttle doesn't snap shut immediately.

[BMW335iOn18s]

Hey Chris, I am very well versed in rev-hang with modern manual transmission vehicles. There is little to NO rev hang with the N55. Nothing like a civic si 8th gen, a tsi VW (2010+), Subaru WRX with FA20, etc.

HOWEVER, engine braking is there but minimal due to valvetronic and the fact that there are fewer pumping losses than in older more traditional engines with throttle bodies. However, this does not impede he manual transmission experience like it does in other cars. If BMWs had rev hang, I would ditch the 6 Speed for the 8 speed automatic or DCT in a heart beat because it drove me NUTS! I can send you videos of how quickly the revs drop when you clutch in. The N55 is very linear and naturally aspirated feeling and throttle response is EXCELLENT. Better than an e46 (330i). In sport, it's a little worse than an M3 most likely, but better than a 330i. I haven't driven an s55 powered BMW, but I've driven pretty much any other manual BMW out there, save for N54 6 speed and e92 m3 6 speed. I've also driven many other stick shift cars and the only ones who did it better are Porsche IMO, and maybe the Honda S2000. Let me know if you have any further questions.

[BMW335iOn18s]

Originally Posted by chris719

The rev hang is not turbo related though. My Mazda 3 does it and so do the non GT naturally aspirated Porsches when in Normal mode. I think it's an emissions or fuel economy related thing. It does not go away in Sport mode on the M235i?

When I first started switching back and forth from the Mazda 3 and Z4M I would downshift and expect immediate engine braking like on the S54 but in the Mazda and many other cars now it's like the throttle doesn't snap shut immediately.

Your Porsche has rev hang? Care to post a clip? I'm just curious because I drove a 2015 Cayman (non-S) and it didn't rev hang when I put the clutch in.

[BMW335iOn18s]

This is bad rev hang - what I experienced in my VW GLI.

[chris719]

Originally Posted by BMW335iOn18s

Your Porsche has rev hang? Care to post a clip? I'm just curious because I drove a 2015 Cayman (non-S) and it didn't rev hang when I put the clutch in.

I don't have one, just relaying what I heard from a friend who has driven a 981 Boxster and E46 M3 and also saw a few posts about it on Planet 9. It supposedly does not occur if the car is in Sport or Sport Plus. The reports could be wrong, but they are independent sources.

Yeah your video above is exactly what I am talking about. My Mazda 3 has a bit of it but not as bad as that video for sure.

Glad to hear that it is minimal in the N55. I have driven a car with an N54 but it was so long ago I couldn't remember how that behaved, and that was pre-valvetronic.

[WAY]

I've had or currently have a manual 981 Boxster S, 981 Cayman S PDK and a GT4 which is obviously also manual. Can't say I've experienced rev hang?

[aquasurf]

I spent some time investigating the rev hang in modern cars and posted my findings here.

[Die ///M Rakete]

I get to drive both N55 M235i's and S55 M3/M4's at least once or twice a week and can assure you that there is no discernible difference between them in throttle response.

There is a reportedly different (bigger?) turbo in the M2's N55B30TO so we will have to wait and see how responsive it turns out to be. I suspect very

[PrematureApex]

Originally Posted by Die ///M Rakete

There is a reportedly different (bigger?) turbo in the M2's N55B30TO so we will have to wait and see how responsive it turns out to be. I suspect very

Link to that report?

[BMW335iOn18s]

Haha how did you find this thread so quickly

[Die ///M Rakete]

Originally Posted by PrematureApex

Link to that report?

No link really. It was reported by MR. after speaking with a BMW rep. It's on the front page of Bimmerpost. Taken with a grain of salt, of course.

[PrematureApex]

Originally Posted by Die ///M Rakete

No link really. It was reported by MR. after speaking with a BMW rep. It's on the front page of Bimmerpost. Taken with a grain of salt, of course.

The ///Moron rep who said it was a twin turbo?

Please tell me that's what people are using for the basis that "it's all but confirmed" (see the recent thread made on the subject) the M2 has a different turbo.

If the 235 has a single turbo, and the rep thought the M2 had twin turbos, of course the rep would say the M2 has different turbo(s) than the 235.