Max torque for a stock clutch G87

WBRacing · 01-04-2024, 11:17 AM

So my ECU is across the pond getting unlocked right now. I was curious if anyone has tuned a manual G87's and left in the stock clutch. My tuner is thinking the stock clutch can reasonable take up to around 550 WTQ and not have a significant impact on its life expectancy. I know BMW says it is fairly maxed out at around 400 but the new 2025 look like they are getting a small boost or at least an updated torque figures. Making me think that number might be conservative even by manufacture standards.
Thoughts from the community?

Ravenseal · 01-04-2024, 04:29 PM

Most people generally agree the manual clutch in all 3 G8x cars can't reasonably handle more than 500 ft-lb. The car, stock, produces about 406 to the wheels. Proceed with caution.

DBV · 01-04-2024, 04:40 PM

Not sure what upgrades were made to the 3.0 CSL clutch, but since that puts out significantly more power, I’d look at replicating that setup for handling the torque if you’re (I’m assuming) bumping HP to a similar level as that car.

kyrix1st · 01-04-2024, 05:13 PM

Quote:

Originally Posted by DBV

Not sure what upgrades were made to the 3.0 CSL clutch, but since that puts out significantly more power, I’d look at replicating that setup for handling the torque if you’re (I’m assuming) bumping HP to a similar level as that car.

Same max torque, only difference is it happens all the way to redline. It's a simple software tune.

WBRacing · 01-05-2024, 12:11 PM

Quote:

Originally Posted by Ravenseal

Most people generally agree the manual clutch in all 3 G8x cars can't reasonably handle more than 500 ft-lb. The car, stock, produces about 406 to the wheels. Proceed with caution.

Appreciate that. Looking at the M4 forums it sounds like new clutches are exciting to.

DrewNewM2 · 01-07-2024, 11:44 AM

I don’t see many instances of failed clutches on tuned G8X cars posted anywhere but it’s good to know that some aftermarket clutches available for those who want to push limits.

Bearded-Driver · 01-10-2024, 03:20 PM

Wagner offers a replacement clutch for the G8X that can hold 808 fltq. from what i gather I do think that these clutches seem to be ok up until around 550 to 600 but imo that would be pushing it. here is the link the the wagner one i was looking at. IM not sure how much of a pain it is to drop the trans in these.

note that this is a single mass flywheel so there is going to be some vibrations and possible chatter and it seems from what i can tell should provide a smooth shift like OEM on the streets

https://www.wagner-tuning.com/produc...002001001.html

01-04-2024, 11:17 AM	#1
WBRacing Enlisted Member 97 Rep 39 Posts Drives: 370Z NISMO, G87 M2 Join Date: Feb 2023 Location: MN, USA iTrader: (0)	Max torque for a stock clutch G87 So my ECU is across the pond getting unlocked right now. I was curious if anyone has tuned a manual G87's and left in the stock clutch. My tuner is thinking the stock clutch can reasonable take up to around 550 WTQ and not have a significant impact on its life expectancy. I know BMW says it is fairly maxed out at around 400 but the new 2025 look like they are getting a small boost or at least an updated torque figures. Making me think that number might be conservative even by manufacture standards. Thoughts from the community?
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01-04-2024, 04:29 PM	#2
Ravenseal Lieutenant Colonel 2755 Rep 1,752 Posts Drives: 2023 M2 6MT Join Date: Jan 2016 Location: Denver iTrader: (0)	Most people generally agree the manual clutch in all 3 G8x cars can't reasonably handle more than 500 ft-lb. The car, stock, produces about 406 to the wheels. Proceed with caution. __________________ 2023 G87 M2 - Toronto Red \| 6MT \| M HAS \| CF Roof \| BMW 826M Forged Wheels \| Mishimoto Skid Plate \| Active Autowerks Single Midpipe Retired: 2022 M240i xDrive \| 2021 Audi RS5 \| 2019 Camaro 2SS 1LE 6MT \| 2016 428i GC \| 2011 BMW 335is
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01-04-2024, 04:40 PM	#3
DBV Captain 779 Rep 961 Posts Drives: G87 M2, G20 330d, Brabus Smart Join Date: Mar 2013 Location: Berlin iTrader: (0) Garage List 2023 BMW M2 [8.75] 2018 Brabus Smart [0.00] 2021 BMW 330d [0.00]	Not sure what upgrades were made to the 3.0 CSL clutch, but since that puts out significantly more power, I’d look at replicating that setup for handling the torque if you’re (I’m assuming) bumping HP to a similar level as that car. __________________ @DBV_ Current: '23 G87 M2 6MT / '21 G20 330d / '18 Brabus Smart Gone: '21 G05 X5 M50d / '18 MB C63s (632hp) / '16 F80 M3 6MT (570hp) / '09 F01 750i / '16 Abarth 595 Competizione (202hp)
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01-07-2024, 11:44 AM	#6
DrewNewM2 Private First Class 365 Rep 195 Posts Drives: Brooklyn Gray G87 Manual Join Date: Jul 2023 Location: NY iTrader: (0)	I don’t see many instances of failed clutches on tuned G8X cars posted anywhere but it’s good to know that some aftermarket clutches available for those who want to push limits.
	Appreciate 2 middyM96.00 Bearded-Driver876.50 Quote

01-10-2024, 03:20 PM	#7
Bearded-Driver First Lieutenant 877 Rep 374 Posts Drives: BMW M2 (G87) and X3m40i Join Date: Nov 2023 Location: Northern VA iTrader: (0)	Wagner offers a replacement clutch for the G8X that can hold 808 fltq. from what i gather I do think that these clutches seem to be ok up until around 550 to 600 but imo that would be pushing it. here is the link the the wagner one i was looking at. IM not sure how much of a pain it is to drop the trans in these. note that this is a single mass flywheel so there is going to be some vibrations and possible chatter and it seems from what i can tell should provide a smooth shift like OEM on the streets https://www.wagner-tuning.com/produc...002001001.html
	Appreciate 4 DBV778.50 CadolinaRipr319.00 daddyjaxx4.50 DrewNewM2364.50 Quote