Dodson Motorsports also hold the DCT clutch record for the R35 GT-R, Lamborghini Huracan, Porsche 991 Turbo S, Audi S3, Mitsubishi EVO X and more – so you know you’re getting a quality product! Currently we are offering 20 Bar mappings for all DCT vehicles, which opens up room for around 1000 Nm/773 ftlb of Torque.Renaissance Speed, your trusted source for McLaren performance, is thrilled to be able to finally announce the first McLaren DCT clutch upgrade from Dodson Motorsport with the Sportsman series #SEMA2019. How quickly that happens depends on the quality of your tune and your right foot. Fortunately, both DCT generations have plenty of room to increase the clutch pressure and let them safely operate at much higher torque levels. Usually slip starts to occur occasionally when being right at the limit and then happens more and more often over time, as clutch quality decreases. However, a FBO M4 with S55 engine can easily get close to the DCT's limits, while the M5 with S63 engine reaches the 18 Bar limit just with a Stage 1 software tune. A stock M4 running around 600 Nm/440 ftlb will of course never touch that limit and there's plenty of room to compensate for very high oil temperatures and nearly worn out clutches. Those limits are the same in all BMW calibrations, regardless if it's a 335is E92/M3 GTS E92 (both 17 Bar) or M4/M4 GTS/M5 Comp. With the stock calibrations the 1st Gen DCT (E-Series) is limited to 17 Bar of Clutch Pressure, while the 2nd Gen units (F-Series) employ a 18 Bar limit. In such circumstances the DCT won't be able to survive even when ran within it's stock torque limits. Of course this issue gets aggraveted by piggy-back units or poor engine mappings, which manipulate Torque Calculation inside the ECU and let the transmission run with too low oil pressure from the beginning. Of course your clutches have taken a substantial beating already at this point.īut even if Slip only occurs in a small range each time you mash the throttle, there will be extended wear on the clutch packs, which then often leads to DCT transmissions ready for the trash within a few thousand or maybe 10000 miles. In this case slip will just continue until one of the clutch temperature monitors starts to trigger and you are left with a "Overheat" Message in the iDrive and Limp-Mode. Most people do not feel a few 100 RPM slip, when being overwhelmed by the sensation of 700+ Nm put down to the road. In case of minor slip this might get unnoticed by the driver. It will try to raise pressure until it hits the 17/18 Bar limit, but then clutches will just slip. Often this happens completely unnoticed by the driver. Slipping Clutches in the ZF 6HP/8HP will trigger torque limiters sent to the Engine Controller, to quickly get everything in check again during driving. Even the stock BMW M5/M6 F1x touch that limit with their Competition variants delivering 700 Nm from factory. Unlike the ZF-Automatic Transmissions, the DCT does not employ torque limiters per Gear to protect it's internals. However, times have changed and that 700 Nm often get exceeded by far in the Aftermarket/Tuning World nowadays. Rated at 700 Nm (520 ftlb) the DCT offered plenty of reserve when entering the market for the M3 E92 and 335i in 2008.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |