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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.

 

Available DCT clutch upgrades

Description

No of plates

Part no/product link

Max engine torque at 15.5bar clutch pressure

Max engine torque at 17.5bar clutch pressure

Price (without VAT)

Note

Stock clutch pack M3 with stock M3 firmware (600Nm)

11

 

880 Nm/650 ft-lbf

1000 Nm/740 ft-lbf

 

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

Dodson Motorsport - Sportmans plus (950Nm)

20

DMS-8002

1200 Nm / 885 ft-lbs

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) clutch package

16

BMW900

930 Nm / 685 ft-lbf

1250 Nm / 920 ft-lbf

~2590USD

 

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

16

BMWSPECRPKG

930 Nm / 685 ft-lbf

1250 Nm / 920 ft-lbf

~4700USD


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

18

BMWSPECXPKG

Soon

Soon

~5300USD

We are still waiting on this one...

Note: We have developed a custom firmware to be flashed to the DCT TCU to gain a higher clutch pressure, only available if you send an TCU to our location in Sweden.

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

 

 

Common aftermarket clutch kits upgrades

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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, the 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

 

clip1176

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.