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DCT hardware upgrade

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BMW E9x M3 has a clutch pressure limit in stock TCU of ~15.5bar, which must be increased to withstand higher torque transfer.

 

Note: Always do a DCT clutch relearn after a clutch upgrade!

 

Available DCT clutch upgrades

Description

Discs

Product link

Max engine tq at 15.5bar

Max engine tq at 17.5bar

Max engine tq at 20bar

Price (ex VAT)

Note


Stock clutch pack

11

 

880 Nm/650 ft-lb

1000 Nm/740 ft-lb

1100Nm/811 ft-lb

 

The "GTS" firmware increases the clutch pressure with 0.2-0.5bar


Dodson Motorsport - Sportmans plus (950Nm)

20

DMS-8002

1200 Nm / 885 ft-lb

1400Nm

 

~4300USD

Did not slip at 1400Nm. We have seeing issues with clutch relearn and these clutches.


Dodson Motorsport - PROMAX (not released yet)

 

BMWPROMAX

-

-

 

 

When Dodson release it, we will try it.


South Side performance (SSP) - SPEC-R (1220Nm)

16

BMW900

930 Nm / 685 ft-lb

1250 Nm / 920 ft-lb

 

~2590USD

 


South Side performance (SSP) - SPEC-R (1220Nm)

16

BMWSPECRPKG

930 Nm / 685 ft-lb

1250 Nm / 920 ft-lb

 

~4700USD



South Side performance (SSP) - SPEC-X (1350Nm)

18

BMWSPECXPKG

Soon

Soon

 

~5300USD

We are still waiting on this one...


See, BMW DCT TCU firmware flashing

 

Common aftermarket clutch kits upgrades

clip1113

Dodson Sportmans plus (950Nm) DMS-8002 clutch kit.

 

 

clip1114

SSP SPEC-R BMWSPECRPKG clutch kit.

 

Both of the above DCT clutch manufacturers are very good clutch kits, nothing bad to say about them, they both work!

Note: All DCT clutches suffer from the same problem though, high torque application and clutch slip, in a matter of seconds you can destroy the whole clutch package, make sure to not exceed its limit. We have added a safety protection in our MTune DCT Settings.

 

 

 

Heavy duty billet basket cases

Do you really need it?

You will sleep better if you have as much car parts as there is...:)

 

Producer

Note

South Side performance (SSP)

Made of heat treated billet steel, little thicker than OEM baskets.

Dodson Motorsport

Made of forged steel, nice machined quality.

clip1117

Both SSP and Dodson offer these "heavy duty billet" baskets.

 

 

Dynocharts with different clutch kits tested for Max clutch performance

Note: we refer to engine torque (in Nm), est = estimated engine power/torque levels.

 

 

Stock clutches (M3 E9x)

 

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Dynochart of a safe torque curve with stock clutches and increase clutch pressure (17.5bar) with special TCU firmware.

 

 

 

SSP curves

 

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South Side performance (SSP) - SPEC-R clutch package, BMW900 with stock clutch pressure at 15.5bar.

 

 

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South Side performance (SSP) - SPEC-R clutch package, BMW900 with uprated clutch pressure to 17.5bar.

 

 

Dodson curves

 

clip1151

At 1230Nm (with 15.5bar clutch pressure) with the Dodson Sportman plus (DMS-8002) started to slip, the clutch is specified to handle 950Nm.

 

 

clip1152

We passed 1400Nm (with 17.2bar clutch pressure) with the Dodson Sportman plus (DMS-8002) did not yet slip, but we at this point stopped pushing the torque levels.