03-17-2019, 12:04 PM | #89 |
Major
558
Rep 1,456
Posts |
Keep in mind the new M5 uses our transmission so it's capable of handling all that torque, but we may have some sort of torque limits set from the factory that can be removed from a transmission flash. I spoke to Alex a while back and it seems like hes in the market to only sell his transmission flash if you're planning on running one of his ecu software. We might not even need a flash only time will tell when these boring beta days are over.
__________________
2024 X3 M40i
2014 BMW M5 |
Appreciate
0
|
03-17-2019, 12:56 PM | #90 | |
Major
798
Rep 1,219
Posts |
Quote:
https://en.m.wikipedia.org/wiki/ZF_8HP_transmission Edit - M5 uses 8HP75, not same transmission. Last edited by GT500R; 03-17-2019 at 01:05 PM.. |
|
Appreciate
0
|
03-17-2019, 01:56 PM | #92 | |
Lieutenant
205
Rep 500
Posts
Drives: BMW 330e F30 M-sport
Join Date: Oct 2008
Location: Norway
|
Quote:
__________________
Thorbjorn
16 BMW F30 330e M-sport Bootmod3 Stage2 / BMS Intake / RM Motors high flow catted downpipe & custom exhaust / BBS CH 19" / H&R Sport springs |
|
Appreciate
0
|
03-17-2019, 02:02 PM | #93 |
Major
798
Rep 1,219
Posts |
|
Appreciate
0
|
03-17-2019, 02:10 PM | #94 | |
Lieutenant
205
Rep 500
Posts
Drives: BMW 330e F30 M-sport
Join Date: Oct 2008
Location: Norway
|
Quote:
People are running way beyond that too without the gearbox exploding, but hard to know how long it will last. But in general my impression is that the ZF is very durable and people are running them way past their rated limit. To take my implementation as an example (330e), the stock torque is 420nm, and the torque limiter is at 550nm. So I guess that in itself is an interesting fact. The stock torque limiter is actually 10% higher than the rating of the gearbox. So they're probably pretty confident it can take at least that much.
__________________
Thorbjorn
16 BMW F30 330e M-sport Bootmod3 Stage2 / BMS Intake / RM Motors high flow catted downpipe & custom exhaust / BBS CH 19" / H&R Sport springs |
|
Appreciate
0
|
03-17-2019, 02:13 PM | #95 |
Major
807
Rep 1,368
Posts |
Damn, so only 1 ft lb more than an M240i makes when stock. Seems odd.
__________________
2017 M240i/ ZF8 Pure Drivetrain Solutions Stage 1 & torque converter/xHP/ Pure 800 cast/ DS2/ E40 Doug Newton tuned/ ER catless DP/ Remus axle back/ BMS intake/ FTP CP/ M Performance LSD
|
Appreciate
0
|
03-17-2019, 02:15 PM | #96 | |
Lieutenant
205
Rep 500
Posts
Drives: BMW 330e F30 M-sport
Join Date: Oct 2008
Location: Norway
|
Quote:
It's right there in the wikipedia link posted above. And it's correct. EDIT: To make it easy for you, that's actually what the 50 stands for 8HP45 (previous generation) had 450nm, the 50 has 500nm, the 8HP75 is 750nm, etc.
__________________
Thorbjorn
16 BMW F30 330e M-sport Bootmod3 Stage2 / BMS Intake / RM Motors high flow catted downpipe & custom exhaust / BBS CH 19" / H&R Sport springs Last edited by hybris; 03-17-2019 at 02:21 PM.. |
|
Appreciate
0
|
03-17-2019, 03:44 PM | #97 |
Major
807
Rep 1,368
Posts |
Yes, I've seen the Wiki page. But regardless, that doesn't make it any less odd that the transmission is rated for the exact output of one of the cars it's used in (actually a fraction of a ft lb less, if we're splitting hairs). 500 NM = 368.78 ft lbs. I'll have to assume the ratings are very conservative.
__________________
2017 M240i/ ZF8 Pure Drivetrain Solutions Stage 1 & torque converter/xHP/ Pure 800 cast/ DS2/ E40 Doug Newton tuned/ ER catless DP/ Remus axle back/ BMS intake/ FTP CP/ M Performance LSD
|
Appreciate
0
|
03-17-2019, 03:49 PM | #98 | |
Major
806
Rep 1,452
Posts |
Quote:
Rather, the "seems odd" purports that either BMW thinks it's okay to run it right on the ragged edge of its rating (of course this is wrong lol), or the ZF8 can take WAAAAY more torque than it's rated for. <- That's probably our winner lol. We can probably assume some 10-20%+ headroom. So a stage 1 or even stage 2 tune should be fine for the stock trans. Hell, the manual is rated even lower and people have been pushing 600+ from N54 days (they have the same 6MT).
__________________
2022 CT4-V Blackwing 6-speed
SOLD: 2016 340i xDrive 6-speed DAW v2.5 turbo E40 | Dorch S2 | VRSF DP | MST intake | AWE catback | 335is clutch | CSF heat exchanger | RK Autowerks intake manifold | Orange M Perf Brake Kit | KW Street Comfort coilovers | GTS taillights V2 |
|
Appreciate
1
B58togo807.00 |
03-18-2019, 08:09 AM | #102 | |
Second Lieutenant
171
Rep 294
Posts
Drives: 2019 M240i Coupe RWD
Join Date: Feb 2019
Location: New England
|
Quote:
Intuitively that doesn't make sense to me unless the transmission is purposely slipping clutches above its programmed limit. I could understand an ECU flash changing the torque. Help me understand! |
|
Appreciate
0
|
03-18-2019, 08:12 AM | #103 | |
Private First Class
34
Rep 124
Posts
Drives: 2017 340i M-Sport
Join Date: Dec 2012
Location: North Carolina
|
Quote:
|
|
Appreciate
1
MassNerd171.00 |
03-18-2019, 08:17 AM | #104 |
Cheapskate
4445
Rep 4,993
Posts |
The part number is 13628637896 but I can't find a rating anywhere. With our stock boost levels, idk why BMW would fit one larger than 2.5 bar. That would still support 21-22psi
|
Appreciate
0
|
03-18-2019, 11:33 AM | #106 |
Major
807
Rep 1,368
Posts |
^^
I saw that yesterday. Looks like Paul is tuning the wife’s grocery getter.
__________________
2017 M240i/ ZF8 Pure Drivetrain Solutions Stage 1 & torque converter/xHP/ Pure 800 cast/ DS2/ E40 Doug Newton tuned/ ER catless DP/ Remus axle back/ BMS intake/ FTP CP/ M Performance LSD
|
Appreciate
0
|
03-18-2019, 11:41 AM | #107 |
Major
798
Rep 1,219
Posts |
That’s pretty good for no bolt ons.
Here is mine with no bolt ons and on E30.. and letting off at the end.
__________________
X3M Alpine White - SOLD
Fastest Tune Only Record - Mission Performance 10.84@127.43 / +1912 DA NH Dragway | 10.6@130 Dragy / +820 DA The Streets | NOW: Tesla Model Y Performance |
Appreciate
0
|
03-18-2019, 12:11 PM | #108 | |
Captain
263
Rep 964
Posts |
Quote:
|
|
Appreciate
0
|
03-18-2019, 01:24 PM | #109 |
Major
798
Rep 1,219
Posts |
Correct, tune only. I wish I had a full E85 tune to run, maybe Alex is looking for those fuel maps as we speak
__________________
X3M Alpine White - SOLD
Fastest Tune Only Record - Mission Performance 10.84@127.43 / +1912 DA NH Dragway | 10.6@130 Dragy / +820 DA The Streets | NOW: Tesla Model Y Performance |
Appreciate
0
|
03-18-2019, 02:34 PM | #110 |
Captain
263
Rep 964
Posts |
|
Appreciate
0
|
Bookmarks |
Tags |
bm3, bootmod3, mg1 |
|
|