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      09-20-2019, 10:14 AM   #111
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Quote:
Originally Posted by Mike0105 View Post
The delta in lap time to the M2C isn't overly impressive but the weather/tires certainly play a big role in that. I'd love to see a magazine put the same tires on both cars and run them back to back.
Overall the lap time puts the M2CS in pretty impressive company. I don't know if I'd trade in my original M2 but I do love the seats, carbon fiber and overall package.
Mike
It's interesting that you mention the seats. I was watching the video that someone posted with the Porsche engineer discussing the GT4 weight increase. When asked what was the must have option he responded with the seats. The improvement in car feel was apparently substantial.
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      09-20-2019, 10:23 AM   #112
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Quote:
Originally Posted by FormulaMMM View Post
If Sport Auto is saying that the M2 C was tested in favorable conditions, why are you doubting them?? They were obviously able to activate the tires. You know better?
Your data makes the point, actually --
There was a 10 mph difference in trap speed into parabolika, with a nearly 60 degree temperature difference. How fast is the CS in that speed trap -60 degrees?
Comp with PSS is -3 mph through Senke turn. They managed to get that close, and match or be within 3 kph through a variety of other turns with the tires iced over? Ok.
Fair enough.

BUT, they also stated after the favourable conditions phrase that

'in the end' --->M2 CS is about more engine power and more tyre grip.<----

So what already has been said, M2 Comp + Sport Cups and a tune and you're good to go....

Cheers
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      09-20-2019, 10:37 AM   #113
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So much discussion when the guy who drove them both and wrote the article summarized the lap-time difference in a few words: it came down only to more power and better tires. No magic suspension or diff mods, etc. Not even the weight difference.
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      09-20-2019, 10:40 AM   #114
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Quote:
Originally Posted by Artemis View Post
Your calculation is inaccurate. 61.900 + 30% = 80.400 | 61.900 + 45.40% = 90.000.
Yeah, tx. My bad. Saw it later today and wanted to edit and correct it.
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      09-20-2019, 11:22 AM   #115
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Quote:
Originally Posted by themightyshrek View Post
So much discussion when the guy who drove them both and wrote the article summarized the lap-time difference in a few words: it came down only to more power and better tires. No magic suspension or diff mods, etc. Not even the weight difference.
Exactly!
Quote:
Originally Posted by Robin_NL View Post
Fair enough.
BUT, they also stated after the favourable conditions phrase that
'in the end' --->M2 CS is about more engine power and more tyre grip.<----
So what already has been said, M2 Comp + Sport Cups and a tune and you're good to go....
Cheers
Robin
Cheers
Robin
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      09-20-2019, 11:29 AM   #116
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Quote:
Originally Posted by AWSB328iM View Post
This is a waste of time if they couldn't find two cars with matching brakes and wheel/tire combinations.
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      09-20-2019, 11:53 AM   #117
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Quote:
Originally Posted by seis-speed View Post
The temps on those runs were drastically different. That seems odd.
Several degrees above freezing versus summer track conditions? Silly , Invalid comparison.
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      09-20-2019, 11:59 AM   #118
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Quote:
Originally Posted by Uncledanny6 View Post
Several degrees above freezing versus summer track conditions? Silly , Invalid comparison.
When this thread was first posted the only thing posted was the specs, there was no article, and after seeing the temp variance, we need to wait to get more data..... The (HP/weight-savings/tires) will obviously produce better times, but same day testing would be more applicable.
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      09-20-2019, 12:01 PM   #119
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Quote:
Originally Posted by Uncledanny6 View Post
Several degrees above freezing versus summer track conditions? Silly , Invalid comparison.
Quote:
Originally Posted by seis-speed View Post
The temps on those runs were drastically different. That seems odd.
Seriously. Testing a car at 1C? Pretty much pointless. The tires would NEVER get up to temp. Would be like driving on ice.
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      09-20-2019, 12:05 PM   #120
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Quote:
Originally Posted by FormulaMMM View Post
The M2 CS is absolutely disadvantaged at 90 degrees. It is not putting down its best lap time at that temp. Not debatable.
Side question: wondering how the bonnet/hood air vent in M2/M3/M4 CS and M4 GTS contributes in managing engine heat.
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      09-20-2019, 12:33 PM   #121
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Quote:
Originally Posted by Artemis View Post
Side question: wondering how the bonnet/hood air vent in M2/M3/M4 CS and M4 GTS contributes in managing engine heat.
Can't speculate on the % contribution of that specific element, but the overall cooling is absurd. I basically can't get the oil gauge to budge, 15-20 minute sessions, even in upper 80s, low 90s ambient.

Pop the hood after the session and there's no heat coming up off the engine block. It's almost bizarre. I'm sure the vent helps.
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      09-20-2019, 01:00 PM   #122
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Quote:
Originally Posted by Artemis View Post
Side question: wondering how the bonnet/hood air vent in M2/M3/M4 CS and M4 GTS contributes in managing engine heat.
From what I have read, the extractor on the M3/4 CS/GTS hood's main purpose is to generate downforce. In conjunction with the front lip, it reduces the amount of air that flows under the car's body and reduces positive pressure under the hood. I am sure it also helps with increasing the flow through the front radiators.
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      09-20-2019, 01:40 PM   #123
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2 seconds is a substantial difference in lap times and the CS is almost as fast as the new NSX and faster than the 718 GTS around that track. That is impressive!!

Conversely, couldn't care less about lap times. Already reserved my manual M2CS to join my M4CS, which I absolutely love and would never sell.
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      09-20-2019, 01:44 PM   #124
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Quote:
Originally Posted by Throttleblip View Post
2 seconds is a substantial difference in lap times and the CS is almost as fast as the new NSX and faster than the 718 GTS around that track. That is impressive!!
Conversely, couldn't care less about lap times. Already reserved my manual M2CS to join my M4CS, which I absolutely love and would never sell.
Same, except I have M3CS
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      09-20-2019, 02:47 PM   #125
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That's so funny: 13.3s on the 0-200km/h vs 15.4s for the M2C, and still some here are trying to make the point that the CS is not significantly faster And some are the very same folks that previously claimed that the M2C is SO much faster than the base M2, while it is less than 0.5s faster on the 0-200km/h

More seriously I'm impressed by the acceleration and deceleration of this CS, and what is even more appealing to me is its adaptative suspension. The OG/C non-adaptative suspension is pure shit, while the M-perf coilover suspension can be well tuned to a given surface but is far from optimal in all conditions. Factoring its impressive performances, its adapt. suspension, its decreased weight, and its exclusivity, this CS is a very appealing package to me! The price is high, but there is nothing better for it on the market if you're searching for a track-oriented sport car with enough practicality to be used as DD. And maybe will it keep pretty well its value (at least in MT), given its exclusivity and the dark evolution of BMW (I don't have much hope for the G87 M2, at least in terms of design, given the look of the new M3/M4).
So, in short, I'm seriously considering buying this CS
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      09-20-2019, 03:01 PM   #126
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Quote:
Originally Posted by MightyMouseTech View Post
Seriously. Testing a car at 1C? Pretty much pointless. The tires would NEVER get up to temp. Would be like driving on ice.
You have obviously never driven on track on a cold day...
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      09-20-2019, 03:06 PM   #127
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Quote:
Originally Posted by CanAutM3 View Post
Quote:
Originally Posted by MightyMouseTech View Post
Seriously. Testing a car at 1C? Pretty much pointless. The tires would NEVER get up to temp. Would be like driving on ice.
You have obviously never driven on track on a cold day...
I have been racing for nearly 20 years. Have driven at those temps many times.
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      09-20-2019, 03:27 PM   #128
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Quote:
Originally Posted by MightyMouseTech View Post
I have been racing for nearly 20 years. Have driven at those temps many times.
Then you should know that once you get the tires up to temp, good grip can be achieved.
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      09-20-2019, 03:45 PM   #129
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Quote:
Originally Posted by CanAutM3 View Post
Quote:
Originally Posted by MightyMouseTech View Post
I have been racing for nearly 20 years. Have driven at those temps many times.
Then you should know that once you get the tires up to temp, good grip can be achieved.
Will never happen at that temp. Tires will significantly cool off between corners.
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      09-20-2019, 04:19 PM   #130
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      09-20-2019, 04:22 PM   #131
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Quote:
Originally Posted by MightyMouseTech View Post
Will never happen at that temp. Tires will significantly cool off between corners.
Hmmmm, and you claim you have 20 years experience in racing?
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      09-20-2019, 04:35 PM   #132
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Quote:
Originally Posted by CanAutM3 View Post
Quote:
Originally Posted by MightyMouseTech View Post
Will never happen at that temp. Tires will significantly cool off between corners.
Hmmmm, and you claim you have 20 years experience in racing?
Yes. Lap times at that temp will be off a couple secs per lap.
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