2017 BMW M2 Update 2: Taking it to the Streets

Because an M-car owner might do the same, we took our bone-stock M2 with 7,655 miles on the odometer to a track to see how well it would withstand hot lapping on a hot summer day in the California high desert. In the capable hands of our tame racing driver, Randy Pobst, we ran three sets of laps around the Streets of Willow Springs. Here’s what we learned from a total of 10 laps in 95-plus degree weather.

If you’re looking for the quickest way around a track, don’t bother with Sport+. We found its bespoke M Dynamic electronic stability control system to still be a too intrusive, hampering progress. What’s more is that Randy “hates” the M DCT transmission in this mode. “In brake zones, even in Sport+, it will not automatically perform matched-rev downshifts [a la Porsche or Mercedes-AMG]. The downshifts happen after going to the throttle. Too late,” Randy said. “Also, the upshifts are too aggressive, unsmooth, and can/will cause the rear tires to lose traction while cornering.” The best lap in this mode was an “angry and frustrating” 1:26.35.

Disabling ESC drops the car into Sport mode, which is what Randy did next. It also provided the quickest lap of the morning at 1:24.78. Convinced he could eke out even more time by telling the transmission when and where to shift, Randy finally tried Sport / ESC off / manual-shift mode. Unfortunately, the best lap he could muster was a 1:25.14 because we found a measurable drop in engine output as it heated up. We know this from looking at the telemetry that showed the M2 wasn’t accelerating as quickly nor reaching the same Vmax as it was earlier in the day. In the end, our M2 was just 0.51 second off an M2 with a six-speed manual from our cover story, The Leftovers. Same driver, same car, but a different transmission and a different day.

What Randy liked about the M2 was the “N55” engine’s utter lack of turbo-lag. This is especially interesting because it features a single, twin-scroll turbocharger compared the M3/M4’s “S55” twin-turbo. “The M2 puts the power down very well—much better than the M4,” he said.

2017 BMW M2
BASE PRICE $53,495
PRICE AS TESTED $57,795
VEHICLE LAYOUT Front-engine, RWD, 4-pass, 4-door coupe
ENGINE 3.0L/365-hp/343-lb-ft* turbo DOHC 24-valve I-6
TRANSMISSION 7-speed twin-clutch auto
CURB WEIGHT (F/R DIST) 3,506 lb (52/48%)
WHEELBASE 106.0 in
LENGTH x WIDTH x HEIGHT 176.2 x 73.0 x 55.5 in
0-60 MPH 4.2 sec
QUARTER MILE 12.9 sec @ 107.1 mph
BRAKING, 60-0 MPH 106 ft
LATERAL ACCELERATION 0.99 g (avg)
MT FIGURE EIGHT 23.9 sec @ 0.83 g (avg)
REAL MPG, CITY/HWY/COMB 18.7/29.8/22.5 mpg
EPA CITY/HWY/COMB FUEL ECON 20/26/22 mpg
ENERGY CONS, CITY/HWY 169/130 kW-hrs/100 miles
CO2 EMISSIONS, COMB 0.87 lb/mile
TOTAL MILEAGE 7,949
AVERAGE FUEL ECON 20.5 mpg
UNRESOLVED PROBLEMS None
*369 lb-ft @ 1,450 – 4,750 rpm in overboost

MORE ON THE BMW M2 RIGHT HERE:

The post 2017 BMW M2 Update 2: Taking it to the Streets appeared first on Motor Trend.



from Motor Trend http://ift.tt/2h5P9mV

Aucun commentaire:

Enregistrer un commentaire