|
Post Reply |
|
Thread Tools | Search this Thread |
06-03-2013, 01:49 PM | #23 |
Major General
5291
Rep 5,875
Posts |
Entertaining read. Thanks for posting.
0-60 in 3.5-3.7 seconds from a RWD with 275 width street tires huh? I know the calculated numbers don't factor loss of traction but I'm guessing that wouldn't be possible without a serious tire upgrade. |
Appreciate
0
|
06-03-2013, 01:50 PM | #24 | |
General
21159
Rep 20,754
Posts
Drives: 2021 911 turbo
Join Date: Jan 2012
Location: Montreal
|
Quote:
FD: 3.15 1: 4.25 2: 2.57 3: 2.03 4: 1.60 5: 1.27 6: 1.00 7: 0.75 I am curious to see the acceleration curve it would generate. I am guessing a very smooth curve (except for the 1-2 shift) with progressively decreasing acceleration as the speed increases. Again here, just wishful thinking on my part . |
|
Appreciate
0
|
06-03-2013, 01:55 PM | #25 | |
Lieutenant General
636
Rep 10,404
Posts |
Quote:
This is clearly not as fast as a 2011-2012 GT-R. I've seen low 11s reported for that car. It's all about power and weight. If this car gets 450 hp and has a weight in line with my ESTIMATE. It simply WILL be this fast.
__________________
E92 M3 | Space Gray on Fox Red | M-DCT | CF Roof | RAC RG63 Wheels | Brembo 380mm BBK | | Vorsteiner Ti Exhaust | Matte Black Grilles/Side Gills/Rear Emblem/Mirrors | | Alekshop Back up Camera | GP Thunders | BMW Aluminum Pedals | Elite Angels | | XPEL Full Front Wrap | Hardwired V1 | Interior Xenon Light Kit | |
|
Appreciate
0
|
06-03-2013, 01:57 PM | #26 | |
Lieutenant General
636
Rep 10,404
Posts |
Quote:
__________________
E92 M3 | Space Gray on Fox Red | M-DCT | CF Roof | RAC RG63 Wheels | Brembo 380mm BBK | | Vorsteiner Ti Exhaust | Matte Black Grilles/Side Gills/Rear Emblem/Mirrors | | Alekshop Back up Camera | GP Thunders | BMW Aluminum Pedals | Elite Angels | | XPEL Full Front Wrap | Hardwired V1 | Interior Xenon Light Kit | |
|
Appreciate
0
|
06-03-2013, 02:02 PM | #27 | |
Lieutenant General
636
Rep 10,404
Posts |
Quote:
There are no excuses . Google spreadsheets are free, recall that this is always exactly true: HP = torque x rpm / 5252
__________________
E92 M3 | Space Gray on Fox Red | M-DCT | CF Roof | RAC RG63 Wheels | Brembo 380mm BBK | | Vorsteiner Ti Exhaust | Matte Black Grilles/Side Gills/Rear Emblem/Mirrors | | Alekshop Back up Camera | GP Thunders | BMW Aluminum Pedals | Elite Angels | | XPEL Full Front Wrap | Hardwired V1 | Interior Xenon Light Kit | |
|
Appreciate
0
|
06-03-2013, 02:04 PM | #28 |
Lieutenant General
636
Rep 10,404
Posts |
The simulation fully account for wheelspin, at launch and at shifts. Check out the flat parts of the acceleration vs. time plots. It also accounts for a spinning tire having less friction than a gripping one. Like I mentioned above, cars just keep getting faster and the existing M3 has already done a 3.9 0-60! My range is justified, reasonable and likely.
__________________
E92 M3 | Space Gray on Fox Red | M-DCT | CF Roof | RAC RG63 Wheels | Brembo 380mm BBK | | Vorsteiner Ti Exhaust | Matte Black Grilles/Side Gills/Rear Emblem/Mirrors | | Alekshop Back up Camera | GP Thunders | BMW Aluminum Pedals | Elite Angels | | XPEL Full Front Wrap | Hardwired V1 | Interior Xenon Light Kit | |
Appreciate
0
|
06-03-2013, 02:11 PM | #29 |
Brigadier General
1265
Rep 3,688
Posts
Drives: 2021 Supra 3.0 (Past: 2015 M23
Join Date: Aug 2012
Location: San Francisco, CA
|
Awesome post. 3.6-7 0-60 would be really nice and your quarter mile figures make sense when compared to other cars. Do you have any idea what the mpg will be like for the M3/M4 if shifting gears in low RPMs? and do you buy the rumors that the new engine will have 3 turbos?
|
Appreciate
0
|
06-03-2013, 02:16 PM | #31 | |
Lieutenant General
636
Rep 10,404
Posts |
Quote:
Here are the actual acceleration profiles. Almost identical except in 1st gear. Here is the summary of numbers. No practical change in 1/4 mi time nor trap. Surprised? I'm not. This is very much like the final drive mod debate! Did you follow one or more of those?...
__________________
E92 M3 | Space Gray on Fox Red | M-DCT | CF Roof | RAC RG63 Wheels | Brembo 380mm BBK | | Vorsteiner Ti Exhaust | Matte Black Grilles/Side Gills/Rear Emblem/Mirrors | | Alekshop Back up Camera | GP Thunders | BMW Aluminum Pedals | Elite Angels | | XPEL Full Front Wrap | Hardwired V1 | Interior Xenon Light Kit | |
|
Appreciate
0
|
06-03-2013, 02:19 PM | #32 |
First Lieutenant
248
Rep 371
Posts
Drives: bmw 240i xdrive g42
Join Date: Jul 2012
Location: uk
|
Good read. Fingers crossed fantasy becomes fact!
|
Appreciate
0
|
06-03-2013, 02:36 PM | #35 |
Go Fast And Take Chances
50
Rep 261
Posts |
Fun read!
Thanks for sharing your thoughts.
__________________
2014 Corvette Z51 Stingray 3LT, 7 M/T
2015 KTM 1290 SA Retired- 11 BMW 335, 07 BMW R1200GSA, 04 BMW Z4, 01 BMW K1200RS, 00 BMW R1150GS |
Appreciate
0
|
06-03-2013, 02:44 PM | #36 |
First Lieutenant
6
Rep 341
Posts |
So true. I have a C63 and traction is major issue off the line. That's why the new E63 AMG will be 4-wheel drive. I cannot imagine that you can get below 4 seconds to 60 without a LSD; huge tires and a big rear weight bias in a RWD car.
__________________
2019 911 GTS
2017 M4 CV 2017 Mini JCW |
Appreciate
0
|
06-03-2013, 02:57 PM | #37 | |
Captain
511
Rep 986
Posts |
Quote:
E30M3:190-230hp E36M3: 286-321hp E46M3: 343hp E92M3: 420hp The E36 and E46 had about the same hp, but the latter was faster and better. My guess is that the power will be pretty much like what we saw in E92M3, about 420-430, official that is. We all know BMW are pretty modest, so 450 is likely in the ballpark. But then again, we will see a significant bump in torch, so it will be easier and more of a daily driver with the low end torch, and faster than the excisting M3.
__________________
3 series: E30: 89 325i, E36: 92 325iC, 94 320iC, 96 320i Convertible, 94 320iaC, E46: 99 320ia, E90: 06 318i Le mans, E91: 07 318dt
5 series: E39: 97 520ia, 01 530Dat, E61: 09 520Dat X series: E83 05 X3 2.0d, E84 10' X1 2.0 X-drive DA, F25 13' 2.0da X-drive. |
|
Appreciate
0
|
06-03-2013, 03:34 PM | #38 |
Private
4
Rep 58
Posts |
Well, I was hoping it would be 450, but all recent reports indicate no HP increase, but significant weight loss (targeting E46M3).
__________________
08 335xi Monaco Blue, '14 MCSc British Racing Green II
05 330Ci Convertible ZHP, Imola Red (sold) 00 540 sport, Orient Blue (gone, RIP) |
Appreciate
0
|
06-03-2013, 03:54 PM | #40 |
Private First Class
33
Rep 176
Posts |
I think the final BMW official # for 0-60 is more like a 3.8-4.2 second car. Can't really see how it can be under 3.7s without serious tire upgrade.
|
Appreciate
0
|
06-03-2013, 04:09 PM | #41 | ||
General
21159
Rep 20,754
Posts
Drives: 2021 911 turbo
Join Date: Jan 2012
Location: Montreal
|
Quote:
If we assume DCT, why the interruption in acceleration on gear shifts? Also, why so much wheel spin and lost acceleration going into 2nd? If the car was able to pull 1g in first gear without losing traction, there is no reason it cannot pull 0.75g in second gear. I am guessing that we don't see benefits of the gearing due to assumed shift times and tire slippage shifting into 2nd... Let me explain why I selected those gear ratios. I reduced 1st gear because I don't think the tires would be able to sustain 1.2g in real life, so I reduced it to slightly above 1g. I also adjusted the spacing between gears 2 to 6 so that the engine always remains in the power plateau, which should yield better theoretical acceleration. Quote:
Well this is relative. Small changes in gearing, where the average (or total) power produced during the whole acceleration run is unaltered, will not have an impact on trap speed or ET. However, if by optimizing the gearing, more average (or total) power can be produced for the same acceleration run, in such case, ET and trap speed will be better. The more extreme example is imagining doing a run in only one gear... Last edited by CanAutM3; 06-03-2013 at 06:06 PM.. |
||
Appreciate
0
|
06-03-2013, 04:25 PM | #43 | |
Major General
3482
Rep 6,787
Posts
Drives: 2016 BMW i8
Join Date: Dec 2006
Location: Monarch Beach
iTrader: (1)
Garage List 2012 BMW e92 M3 [0.00]
2021 BMW X5M [10.00] 2015 Porsche 991 Tu ... [10.00] 2015 Porsche 991 GT3 [10.00] |
Quote:
__________________
Current BMWs: 2022 X5 40i, 2016 X5 50i
2015 Porsche 991 Turbo S 1979 Porsche 911 Turbo (930) a couple others IG: longboarder949; YouTube: https://www.youtube.com/channel/UCT1...eoFBszPIK0gf9w |
|
Appreciate
0
|
06-03-2013, 04:28 PM | #44 |
Major General
4470
Rep 7,589
Posts
Drives: '19 M2C
Join Date: Jun 2007
Location: Chicagoland
|
Swamp,
No matter what the 0-60 ends up being, your calculations are impressive. Thanks for all the hard work you put into your analysis!
__________________
www.ReTuneTheDeTune.com
2019 M2 Competition (Sunset Orange) |
Appreciate
0
|
Post Reply |
Bookmarks |
Thread Tools | Search this Thread |
|
|