Originally Posted by tdurr
Originally Posted by TonyRSX
Originally Posted by sabastian458
If you don't know transmissions or how they work then I'm gonna lose you here, essentially it's the same as VW/Audi DSG which is a twin disc version of their SMT which is identical to BMW's SMG/SMG II and Ferrari's F1. They are automated manual transmissions.Originally Posted by chinitoxamor
I can't say for sure on VW's SMT but I know for a fact that BMW's SMG/SMG II and Ferrari's F1 it's the exact same transmission as their manual, the only difference is the clutch slave cylinder is replaced by a computer controlled [electro] hydraulic actuators (plus the shift linkage is automated too). Instead of pushing a pedal to force the fluid to disengage the clutch then releasing the clutch pedal to engage the clutch the computer does it faster than a human ever could...
BMW SMG II (M3 E46) - 80 ms
Ferrari F1 (Maserati 4200GT) - 80 ms
Ferrari F1 (360 F1) - 150 ms
Ferrari F1 (Enzo) - 150 ms
Ferrari F1 (575M) - 220 ms
BMW SMG (M3 E36) - 220 ms
Aston Martin Vanquish - 250 ms
The twin disc transmission like the EVO's SST (Getrag), VW's DSG (BorgWarner), BMW's DCT (Getrag), the Nissan GT-R's transmission (Getrag), etc. are supposedly as fast as 8ms between gears....or 10 times faster than BMW's SMG II. Basically it's two transmissions combined into one compact unit, one clutch is for 1st, 3rd, and 5th and the second clutch is for 2nd, 4th, and 6th...
When you are in first gear the "2nd transmission" is in 2nd, then it seamlessly switches "transmissions" and when you're in 2nd the 1st shaft is in 3rd waiting for you to shift again. When you're in 3rd gear the 2nd shaft has 4th gear waiting, etc...but what if you don't upshift? Maybe you need to quickly downshift instead? The computer senses from the RPM's what gear will be next and prepares for it on the other shaft. Technical yes. Faster than a standard transmission, yes. More reliable and less moving parts than a regular automatic, yes.
With a standard transmission, as well as the original automated manuals like SMG or F1, as you're shifting gears 100% of the power to the wheels is lost: 100% power to 0% power back to 100% power. The new twin clutch transmissions however have virtually 100% of the power going to the wheels at 100% of the time. You can't get a faster or smoother shift than that in a performance car.
Do I like it? Eh, I like the connection of driver, car, and road...nothing calms me more than running through the H pattern in car or sequential shifter on a bike. However, smoothness and quickness is what wins races. This is the direction cars are going and one day we'll have race car drivers that have never operated a clutch with their foot. They'll be wondering what that 3rd pedal is for, lol.






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