Quote:
Originally Posted by CanAutM3
Quote:
Originally Posted by Halim@HCP
We don't do much 1/4 mile here. We test a lot of 100-200 km/h.
Stock is around 9.3-9.4 sec
ZCP 8.8-9.0
CS 8.2-8.6
BM3 CS 8.0-8.3
BM3 STG1 6.8-7.0  |
I am susprised with the numbers posted above for the CP. Doing a survery of different European magazine I came up with the following average results:
Quote:
Originally Posted by CanAutM3
On this quiet, cold and rainy Sunday afternoon, I had a little time to kill. So I set out to capture test results from European publications (mostly German) for acceleration to compare the different M4 variants. To remove the effect of the added grip at launch provided by PSC2 when the cars are so fitted, I only set out to capture the 100 to 200km/h acceleration. I compiled 21 different tests and then averaged the results for each M4 variant (DCT only). While this is not the most scientific approach, it does provide a decent perspective. Here are the results:
100km/h - 200km/h acceleration
9.52 M4 Base (6 samples)
.... ∆ 0.20
9.32 M4 CP (9 samples)
.... ∆ 0.67
8.65 M4 CS (4 samples)
.... ∆ 0.20
8.45 M4 GTS (2 samples)
First, I think this dispels the rumours that the CP is not any quicker than the base model, having a ~0.2 second advantage from 100 to 200km/h. Second, it also shows how the CS pulls quite strongly in the top end, being ~0.7 seconds faster than the CP and only ~0.2 seconds short of the mighty water injected GTS. Which is in line with the conclusion reached in the OP when looking at the power charts  . |
Further, according to your dynos, the CS would not be much faster than a CP on a 100-200km/h as it makes almost the same aversge power in the power band, which is inconsistent with the above results. |
I second this.
From dyno and also proved by datalog, there is little difference across base, cp and cs above 6k rpm where you'd stay (5k5-7k5) in the 100-200 acceleration if not short shifting. BTW, it's arguably not helpful short shifting on stock tune.
Yet CS seems to be a great leap in the 100-200 time mentioned, which probably is not true.