03-17-2018, 09:18 AM | #23 |
Banned
31
Rep 301
Posts |
Actually r&t has the Ctsv hitting 150mph in 17.8s and a trap speed of 126mph. That’s more in line with its advertised power however for sure rwd and 30-profile tires are holding back acceleration numbers ....
|
Appreciate
0
|
03-17-2018, 10:27 AM | #24 | |
Major
967
Rep 1,080
Posts |
Quote:
|
|
Appreciate
1
BimmerGuyFL78592.50 |
03-17-2018, 10:30 AM | #25 | |
Major
967
Rep 1,080
Posts |
Quote:
|
|
Appreciate
0
|
03-17-2018, 10:33 AM | #26 |
Major
967
Rep 1,080
Posts |
Yes - and they are extremely close in performance. That said - with 8 versus 9 gears - those four gears/gearing will be different - enough for the 1/4 mile level tenth of a second difference we are seeing in the test. The Merc finally comes back at the 150 MPH mark - so maybe the closer ratios up too make that difference as it needed to make up ground.
|
Appreciate
0
|
03-17-2018, 10:36 AM | #27 | |
Major
967
Rep 1,080
Posts |
Quote:
Heat soak is a major issue with the Uber tiny blower (1.74L). I had to move to a Procharger to get away from all of these issues and to finally make some power and performance with the car. |
|
Appreciate
0
|
03-17-2018, 04:57 PM | #29 |
Major
178
Rep 1,155
Posts |
C&D back to loving the M5 -- I guess BMW decided to start paying again...
J/K but if someone happens to be on the inside, it sure feels that way. For a while Audi won every comparo.. speaking of which, where is the RS7 in this test?
__________________
2017 Porsche 911GTS - Agate Gray on Black
2009 Aston Martin DBS - Casino Royale Gray on Black (sold) 2014 M5 ZCP - Azurite Black over SSII Full (gone) 2009 M5 - Carbon Black over Sepang Full (gone - not forgotten) 2001 740i M-Sport - Carbon Black over Black (gone - not forgotten) |
Appreciate
0
|
03-18-2018, 05:00 PM | #30 | |
Banned
31
Rep 301
Posts |
Quote:
|
|
Appreciate
0
|
03-18-2018, 06:01 PM | #31 | |
Major
967
Rep 1,080
Posts |
Quote:
That said - that quicker spinning - more "efficient" super charger is a roots type. The literal worst supercharger for heat production. So spinning faster only helps that along. Add the poor engine bay circulation and it is the perfect storm for heat soak. The new ZL1 has 11 coolers for example. Direct injection is another issue - which is why the new ZR1 has both DI and port injection added. Poor aero rounds everything out. Traction is always an issue for any RWD car. But interestingly - the Procharger with much more power - actually hooks better as the real power comes on like a turbo (mid-top) versus a roots SC which is all low end torque. So - it actually worked out. Costly - but worked out lol. |
|
Appreciate
0
|
03-19-2018, 04:33 PM | #32 | |
Banned
31
Rep 301
Posts |
Quote:
It blows my mind even more that they do not work well to control heat, especially on previous years.... |
|
Appreciate
0
|
03-19-2018, 05:24 PM | #33 | |
Major
967
Rep 1,080
Posts |
Quote:
The fact they needed to add 11 coolers shows the scope and urgency of the problem. The fact it works is great. As we didn't get it for or cars however - not so much. I did add the secondary GM rad to mine - but the intense heat soak and poor engine bay circulation just delayed the inevitable. On top of that I had a much larger primary rad, billet thermostat, oil cooler and intercooler. All not enough. At least they got it right the second time around... |
|
Appreciate
0
|
03-19-2018, 07:58 PM | #34 |
First Lieutenant
153
Rep 396
Posts |
The octane issue, if true, could be significant. I will read the whole article shortly. However, if each car was tested based on its approved min. octane, then in a state such as CA where we only have 91 as premium (not counting rare and expensive 100), the BMW, Porsche and Cadillac may be down on power compared to the E63s. Further, adding 93 to a car tuned for 91 does not typically add power. Since the few advantages the M5 has from the chart above over the E63s are razor thin (including storage space??!!), the 91 v. 93 issue might make a meaningful difference in terms of real world performance in 91 octane states. Of course, all of these cars are fast for their categories, and none is a race car.
I am in the market for either a M5 or an E63s so these are interesting times and I really appreciate the new owner feedback! |
Appreciate
0
|
03-19-2018, 08:52 PM | #35 | |
First Lieutenant
233
Rep 354
Posts
Drives: 335XI MPerformance edition
Join Date: Jun 2015
Location: Québec Province
|
Quote:
seems that new m5 use 91 octane minimum but recommend 93 octane .... https://www.bimmerpost.com/forums/at...mentid=1678386 hummm ..... probably the rason why the us version as more hp then european one (+ 8 hp)
__________________
-----------------------------------
E60 550 2007 - Grey // F30 2015 335XI MPerformance edition - Lacuna Seca Blue // F30 2015 335XI MPerformance edition - Grey black // F90 2018 M5 - Donington Grey |
|
Appreciate
0
|
03-19-2018, 09:29 PM | #36 |
First Lieutenant
288
Rep 371
Posts |
|
Appreciate
0
|
03-19-2018, 09:32 PM | #37 | |
First Lieutenant
233
Rep 354
Posts
Drives: 335XI MPerformance edition
Join Date: Jun 2015
Location: Québec Province
|
Quote:
the european version is rated at 441.3 kW the us one is 447 kW https://www.autoevolution.com/cars/b...-xdrive-600-hp my VIN give me 447 kW not 441 like you can see on many review from europe or australia. but the point was more about the recommended 93 octane ...
__________________
-----------------------------------
E60 550 2007 - Grey // F30 2015 335XI MPerformance edition - Lacuna Seca Blue // F30 2015 335XI MPerformance edition - Grey black // F90 2018 M5 - Donington Grey Last edited by MTHX; 03-19-2018 at 10:00 PM.. |
|
Appreciate
0
|
03-19-2018, 09:53 PM | #38 | |
First Lieutenant
288
Rep 371
Posts |
Quote:
It seems like the global press release mentions 441 kW / 600 hp in the specifications, and the BMW USA press release mentions 600 hp. I wonder if someone who was converting units converted 600 US/imperial hp to kW when entering specifications for the US model into the BMW vehicle information database, but they should have converted 600 PS to kW instead (which would result in 441 kW). That seems more likely than a higher tune for the US market, especially since AKI 93 gas is equivalent to RON 98 gas, which is widely available in Europe as well, so I assume the recommendation in Europe will be RON 95 minimum and RON 98 recommended? Unless of course, there are other difference in fuel quality that will cause BMW to tune the engines differently. Last edited by frankchn; 03-19-2018 at 09:59 PM.. |
|
Appreciate
1
MTHX233.00 |
03-19-2018, 10:02 PM | #39 |
First Lieutenant
153
Rep 396
Posts |
The question is did the 93 octane cars get tested on 93 octane or 91 octane? If they were tested on 91 octane then their computers would slightly decrease the performance. On the other hand, if the 93 octane cars were tested on 93 , then they had the full advertised power-- power that would not be available in 91 octane States To the 93 octane cars.
|
Appreciate
1
MTHX233.00 |
03-20-2018, 12:11 AM | #40 | |
Major
967
Rep 1,080
Posts |
Quote:
|
|
Appreciate
0
|
03-20-2018, 01:28 AM | #41 | |
First Lieutenant
288
Rep 371
Posts |
Quote:
|
|
Appreciate
0
|
03-20-2018, 02:18 PM | #42 | |
Major
967
Rep 1,080
Posts |
Quote:
These newer cars are not meant to be driven on lower octane values. |
|
Appreciate
0
|
03-20-2018, 02:36 PM | #43 | |
First Lieutenant
288
Rep 371
Posts |
Quote:
So I am guessing (without any real evidence) at worst horsepower will drop 5% or so perhaps? Not sure my butt dyno is accurate enough to measure that on the roads |
|
Appreciate
0
|
03-20-2018, 08:32 PM | #44 | |
Major
967
Rep 1,080
Posts |
Quote:
|
|
Appreciate
1
MTHX233.00 |
Post Reply |
Bookmarks |
|
|