06-16-2018, 11:28 AM | #1 |
Major
1404
Rep 1,466
Posts |
0-60, particularly in a manual
A few weeks ago I bought a dragy, mostly out of interest, but also to compare the performance I was getting from my tune compared to others. Dyno is interesting, but dragy data also has its place.
I'm on vacation in England at the moment, and brought the dragy with me. Last night I went out with my brother in his Mazda MX-5, which is the 2 litre version with a manual box. He's not that bothered about numeric performance, and loves the MX-5 for driver involvement. I was quite impressed out how easily he drifted it round a small roundabout without spinning! In any case, I encouraged him to do one 0-60 attempt with the dragy, and he reluctantly agreed. On this, his only and first attempt, he got a 7.02s time. Mazda quotes his car as 7.3, so he beat the manufacturer's time first try! I have a 6MT M2, and BMW quotes this as 4.3 I believe, and several websites and magazines appear to have validated this. The question I have is how the hell was that achieved? The best I've gotten, even with a tune, is 5.12s. That's quite a bit better than my brother's 7.02 in his MX-5, but it's way longer than BMW claims it should be. DCT launch is pretty easy with launch control, and there is no loss of boost on shifts, but am I missing something with 6MT that I should be doing? My car seems to bog down on launch because the turbo isn't spooled up, and comes off boost on 1st to 2nd changes. Should I be doing no lift shift from 1st to 2nd? Is there a technique I'm missing for launching our cars with 6MT? What dragy times have 6MT drivers actually achieved?
__________________
2018 ///M2 LCI, LBB, 6MT...
Current Performance Mods: CSF FMIC, ER CP, Fabspeed Cat, Aquamist WMI, GFB DV+, NGK 97506, BM3 (Stage 2 93 OTS), CDV delete, UCP, M2C/M3/M4 Strut Brace, M3/M4 Reinforcement Rings |
06-16-2018, 02:43 PM | #2 |
Second Lieutenant
360
Rep 289
Posts |
Dragy should show you times of other vehicles similar to yours, along with what mods were done to them.
Here's one of the few that I was able to find for an M2. It is strange that this owner seems to have done several mods (Dinan cat back, VF Engineering stage 1) and the best time he seems to have gotten is a 4.54s |
Appreciate
0
|
06-16-2018, 02:47 PM | #3 | |
First Lieutenant
310
Rep 339
Posts |
Quote:
__________________
instagram: @ sf87_m2
|
|
Appreciate
0
|
06-16-2018, 02:57 PM | #4 |
Major
1404
Rep 1,466
Posts |
Doesn't show if he's 6MT or DCT. My 5.12 looks like this:
That 4.54 result has a much quicker shift than I was capable of, but that doesn't mean it is DCT, I might just be crap! |
Appreciate
0
|
06-16-2018, 03:09 PM | #5 | |
Major General
5873
Rep 6,638
Posts |
Quote:
if it's cbrash he has DCT. I think he mentioned in a youtube video that the tune made launching the car 0-60 not really any faster because of traction. He did a comparison with a stock M235i. |
|
Appreciate
0
|
06-16-2018, 03:17 PM | #6 |
Private First Class
88
Rep 196
Posts |
It's just really hard to get a perfect launch in a 6mt M2. Such a fine line between wheel spin and bogging down.
I don't have a dragy, just a p3 vent gauge, but my 0-100 times actually got slower after my tune due to more wheel spin. If you launch in anything other than dsc fully off, you most likely won't get 100% throttle. But with dsc off you get wheel spin. BMW probably got their figures in perfect conditions. I'm certain it could be matched, you just need a very grippy start line. |
Appreciate
0
|
06-16-2018, 03:47 PM | #7 |
Brigadier General
1837
Rep 4,203
Posts |
I just got my draggy and did a standing stop launch..... not sure if it was launch control. Did not see the flag like on the M4
1st try I had major burnout and a 0-60 time of 4.74, 1/8 8.36, 1/4 12.97, 1/2 30.99 Did another 0-60 run and a burnout followed with a little sideways action and did 4.83 I need to learn how to launch the car. Does launch control show up with a flag like on the F80/82? |
Appreciate
1
roobs3.50 |
06-16-2018, 04:01 PM | #8 | ||
Major
1404
Rep 1,466
Posts |
Quote:
I've not seen ANY videos or dragy logs of 6MT 0~60 anywhere close to 4.3 seconds. Quote:
__________________
2018 ///M2 LCI, LBB, 6MT...
Current Performance Mods: CSF FMIC, ER CP, Fabspeed Cat, Aquamist WMI, GFB DV+, NGK 97506, BM3 (Stage 2 93 OTS), CDV delete, UCP, M2C/M3/M4 Strut Brace, M3/M4 Reinforcement Rings |
||
Appreciate
0
|
06-16-2018, 05:31 PM | #9 | |||
Brigadier General
1837
Rep 4,203
Posts |
Quote:
|
|||
Appreciate
0
|
06-16-2018, 07:53 PM | #10 |
Second Lieutenant
217
Rep 228
Posts |
Are you guys launch from normal roads or are you launching from a drag strip? It makes a huge difference. With DCT launching at about 4k RPM, there really isn't much wheel spin on a clean strip. Normal road would be a burnout. I do not have an official slip as it was a private session.
But here's the video: Also keep in mind that numbers from magazines measures a little differently. |
Appreciate
0
|
06-17-2018, 01:43 PM | #12 |
Second Lieutenant
209
Rep 212
Posts |
The best I’ve gotten with my bone stock manual M2 is 5.45s 0-60 (clocked using the M Performance Drive Analyzer app and OBDII dongle). I bogged like crazy on launch though and my 1-2 shift was slow so there’s definitely room for improvement.
|
Appreciate
0
|
06-17-2018, 04:32 PM | #13 |
Private First Class
88
Rep 196
Posts |
I managed 0-100 (0-62) in 4.72 in my 6mt while stock on a normal road. That was in sport +
And then 4.4x after stage 2 mods and tune. Haven't been able to repeat again though. Need new tires |
Appreciate
0
|
06-17-2018, 05:35 PM | #15 |
Major
1404
Rep 1,466
Posts |
Nice! That's closer than I've seen anyone get yet, besides the reviewers. Did you do anything unusual like no lift shift to second?
__________________
2018 ///M2 LCI, LBB, 6MT...
Current Performance Mods: CSF FMIC, ER CP, Fabspeed Cat, Aquamist WMI, GFB DV+, NGK 97506, BM3 (Stage 2 93 OTS), CDV delete, UCP, M2C/M3/M4 Strut Brace, M3/M4 Reinforcement Rings |
Appreciate
0
|
06-17-2018, 05:37 PM | #16 |
Major
1404
Rep 1,466
Posts |
I wouldn't say worried, just curious about how BMW and journalists achieved the 4.3 seconds they claim.
I'd also like to learn a new skill if that's required to achieve the time they get.
__________________
2018 ///M2 LCI, LBB, 6MT...
Current Performance Mods: CSF FMIC, ER CP, Fabspeed Cat, Aquamist WMI, GFB DV+, NGK 97506, BM3 (Stage 2 93 OTS), CDV delete, UCP, M2C/M3/M4 Strut Brace, M3/M4 Reinforcement Rings |
Appreciate
0
|
06-17-2018, 05:40 PM | #17 | |
Major General
5595
Rep 5,389
Posts |
Quote:
|
|
Appreciate
0
|
06-18-2018, 11:05 AM | #18 |
Second Lieutenant
217
Rep 228
Posts |
Most publications in the US use one foot of rollout...meaning they don't start the stopwatch until the car has rolled 1 foot. As mentioned before, all the 0-60 tests were done on the track, it makes a huge difference when you don't have to worry about traction which is the number one cause for power loss in a RWD on public road. You simply just can't dump the clutch at 4k without wheel spin on regular roads. Most of them do power shift, but that one shift wouldn't make up for the almost full second difference. Last but not least, if you are using a phone app, it is simply not that accurate even if you calibrate it correctly.
|
Appreciate
1
ZPrime611.50 |
06-18-2018, 12:07 PM | #19 |
Major
1404
Rep 1,466
Posts |
Nothing special really. Something along the lines of:
Clutch in, hold revs at around 2,500 Clutch out reasonably fast, not much slip (of the clutch) and floor the accelerator as soon as it's fully out Keep it floored to red-line in first Regular gear change (off gas, clutch in, shift, clutch out, on gas) as quick as I can
__________________
2018 ///M2 LCI, LBB, 6MT...
Current Performance Mods: CSF FMIC, ER CP, Fabspeed Cat, Aquamist WMI, GFB DV+, NGK 97506, BM3 (Stage 2 93 OTS), CDV delete, UCP, M2C/M3/M4 Strut Brace, M3/M4 Reinforcement Rings |
Appreciate
0
|
06-18-2018, 12:19 PM | #20 | ||||
Major
1404
Rep 1,466
Posts |
Quote:
Quote:
Quote:
Quote:
__________________
2018 ///M2 LCI, LBB, 6MT...
Current Performance Mods: CSF FMIC, ER CP, Fabspeed Cat, Aquamist WMI, GFB DV+, NGK 97506, BM3 (Stage 2 93 OTS), CDV delete, UCP, M2C/M3/M4 Strut Brace, M3/M4 Reinforcement Rings |
||||
Appreciate
0
|
06-18-2018, 01:37 PM | #22 | |
Lieutenant
522
Rep 446
Posts
Drives: 2017 M2 6MT, 2022 X7 M50i
Join Date: Sep 2016
Location: Bay Area
|
Quote:
|
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|