meyerweb’s Post of The Day

[John]

Regarding the thread started elsewhere but since removed that the DCT is out of the Corvette ME because they can not get it to work...

[Quote=meyerweb]Tremec, which makes transmissions for GM, is owned by a Mexican company that recently bought the company that makes DCTs for Ferrari and other companies. I think they can probably figure out how to make one for the Corvette, too.

https://www.midenginecorvetteforum.c...t-change/page2

[Mobius]

Congrats meyerwebb

Here's some info on the TREMEC TR-9007 - the anticipated transmission for the C8.

From elsewhere on the TREMEC site:

One of the great opportunities that exists with a dual-clutch transmission is the ability to create brand-specific shift profiles, ranging from imperceptible limousine-like shifts to ferocious "F1"-style shifts. Basically, the feeling of any maneuver depends on the way torque is transferred to the wheels. The Tremec DCT technology opens up an array of custom options.

In order to create the desired feeling during launch and shifting, Tremec software generates, in real time, the desired torque for the engine and clutches, depending on various input and driving conditions and the maneuver being executed (launch/ creeping, up/down shifting, sport/ comfort-mode). The virtual torque chain converts these torque targets using model-based torque maps and pressure control algorithms into an electrical target for the clutch control valves.

Tremec’s new generation of solenoid valves offer a number of improvements compared with the already excellent current generation, which is used in some of Europe’s finest supercars. These improvements ensure further advances in terms of energy use, application range and robustness.

[John]

That is a wonderful find Mobius. Thank you very much.

Of course to then make it work for each vehicle, it will take a lot of testing and development engineering fine tuning. However, that customization process is what the Corvette team used in developing the C7’s electric steering algorithms, as well as for fine tuning its eLSD, throttle mapping, and it safety systems (how soon does something help to correct yaw and when it gets engaged, at what force/corrective level).

As Fasttoys noted here since just about day one of our forum, it is the DCT’s precise software adjustments/settings that would determine how well we customers perceive its working (or conversely is not working smoothly).

While some are annoyed at the seeming delays in the car’s reveal/release, the extra testing and development time is being spent wisely to fine tune and further refine all of the car’s systems — especially the interactive complex nature of all of the software controlling the hardware.

Will the ME turn out to operationally be as smooth as the proverbial baby’s butt?

[Racer X]

If they could only get them past the "Wall"... Perhaps that's why they need to go back to the A8!

[meyerweb]

One of the great opportunities that exists with a dual-clutch transmission is the ability to create brand-specific shift profiles, ranging from imperceptible limousine-like shifts to ferocious "F1"-style shifts. Basically, the feeling of any maneuver depends on the way torque is transferred to the wheels. The Tremec DCT technology opens up an array of custom options.

And those options, I suspect, can and will vary depending on the driving mode selected, since it's all software controlled. Softer, smoother shifts in Tour, very gradual clutch application in Weather, very quick shifts and clutch engagement in Track, and somewhere in between for Sport.

[John]

Some brands, such as BMW, also have a shift “firmness” selector indicator. I am guessing that GM will stick to current five option, Driver Mode Selector system instead.

[Mobius]

And those options, I suspect, can and will vary depending on the driving mode selected, since it's all software controlled. Softer, smoother shifts in Tour, very gradual clutch application in Weather, very quick shifts and clutch engagement in Track, and somewhere in between for Sport.

My thoughts as well.