Thread: M2C in AS
View Single Post
      10-22-2019, 07:06 AM   #26
CSBM5
Colonel
CSBM5's Avatar
1320
Rep
2,266
Posts

Drives: 2019 M2 Comp, 2011 M3, etc
Join Date: Nov 2005
Location: Greenville, SC

iTrader: (1)

Quote:
Originally Posted by CSBM5 View Post
What is your overall take-away from autocrossing the car? How was the power delivery and ability to hook tires coming off an element? How about power modulation and weight transfer modulation with the throttle? What about turn-in and ability to recover slightly overcooking one? How did you find steering communication approaching/at/just over the peak?

Regards,
Chuck
After 6 runs at BMW CCA O'fest autocross, I can answer my own questions now. By the way, the Peachtree Chapter ran the autocross at the Michelin Proving Grounds, and they setup an outstanding, very well designed course. Kudos to them!

Coming off elements in 2nd gear, the car hooks very well (RE71Rs) and as boost builds and S55 torque comes on so strongly, it is surprisingly easy to modulate rear slip angle with deft throttle adjustment. Far easier than I expected. I had a real sense of the tail of the car and how much throttle to use/take away to keep acceleration at its maximum (just enough slip but not too much, etc). From my experience with the car on the 1/2 mile wet skidpad, I didn't expect it to respond so well in this manner.

So power modulation is decent, excellent in fact, and while street driving made me think it wouldn't have much lift-throttle response, on course it felt fine -- I was easily able to control front weight transfer with the throttle and manage front slip angles. Again, it exceeded my expectations.

I did manage to overcook some entries on a couple of runs, and was able to easily reign in the car, albeit losing time. Steering feedback seemed good to me in that I was able to tell what was going on up front fairly well, and under major trail braking and turning, I could feel what the tires were doing ok.

Overall, the car exceeded my expectations.

Now whether the M2C is required to be in A-street is a different question of course. It would have been nice to have arranged with an owner of a pure stock OG M2 6MT slicktop and with the guys running O'fest autox, to do a comparison between the two cars using the same wheels/tires off my car (OZ stock width/offset wheels with RE71Rs). I might actually have been able to arrange this for a Roundel article now that I think about...it's so nice to have these great after-the-fact thoughts...
__________________
Current Stable:
2019 F87 M2 Competition 6MT, LBB, slicktop, exec pkg
2011.5 E90 M3 6MT Silverstone II, slicktop, Dinan/Eibach, Apex 9.5/10.5x19 with PS4S
2007 E91 328i Silver, slushbox, Eibach fr/E93 M3 rear sway bars, 219Ms
1975 CanAm 125MX2, stock, original owner
Montaver588.50