Originally Posted by Reverant
(Post 1546108)
That would require DBW.
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Very low boostlevel, and softest possible shifting of the gearbox, but it works!
Worlds first 7 speed dualclutch transmission miata turbo :) |
So freaking cool. We plan to put one in a Mustang behind a K24 with 90 series EFR next year.
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Originally Posted by emilio700
(Post 1551272)
So freaking cool. We plan to put one in a Mustang behind a K24 with 90 series EFR next year.
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This is the most winning thing I've seen in a long time.
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Originally Posted by hf-mx5t
(Post 1551268)
and softest possible shifting of the gearbox, but it works!
mb you just pushing button too slow lol cvt next? |
Originally Posted by adlz
(Post 1551294)
ye felt like it should shift faster
mb you just pushing button too slow lol cvt next? |
Meanwhile yeah I thought the shifts were a bit slow and clunky. Calzada is going to help us where he can. Whatever we come up with tech-wise will be handed over to KMiata for possible future kit. |
The shifts maybe clunky because his ECU can't reduce the torque proportionally during the shift as the TCU would normally request to the stock BMW ECU. The shift speed may be increased through the software but this will increase the jerky shift even more.
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Originally Posted by Reverant
(Post 1551323)
The shifts maybe clunky because his ECU can't reduce the torque proportionally during the shift as the TCU would normally request to the stock BMW ECU. The shift speed may be increased through the software but this will increase the jerky shift even more.
It's a lot faster and smoother on my friends chevy nova with the same setup but with more refined tuning :) |
If you happen to know the answers, I have a few questions.
How fast in milli-seconds can this transmission possibly shift when tuned for it? Can it shift with no torque reduction at all? Could it take 500-600 hp and also shift with no torque reduction? Max RPM this box can handle? |
If you’ve ever driven a BMW DCT, sport/m-mode is a pretty drastic different. If that’s equivalent to non-sport mode, then the final tune will be pretty incredible.
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Originally Posted by curly
(Post 1551339)
If you’ve ever driven a BMW DCT, sport/m-mode is a pretty drastic different. If that’s equivalent to non-sport mode, then the final tune will be pretty incredible.
its downright brutal when its full on in "sport" mode.. Video of the same controller in a E30 shows that is doesnt need to bee soft and slow like mine. He runs the same ECU i do. |
Originally Posted by patsmx5
(Post 1551338)
If you happen to know the answers, I have a few questions.
How fast in milli-seconds can this transmission possibly shift when tuned for it? Can it shift with no torque reduction at all? Could it take 500-600 hp and also shift with no torque reduction? Max RPM this box can handle? Its a good idea to run either throttle reduce or ign cut(outputs in the controller for both). People have run 750nm on the stock clutches at lower clutch pressure levels than we do. around 900nm on stock clutches, closer to 1300+ nm on upgraded clutches. The gearsets seem to take pretty much whatever you are able to put into them :D |
Originally Posted by emilio700
(Post 1551272)
So freaking cool. We plan to put one in a Mustang behind a K24 with 90 series EFR next year.
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Originally Posted by hf-mx5t
(Post 1551342)
A full shift operation takes about 80ms, but a normal throttle reduce/ign cut time would be around 30-40ms. One clutch starts engaging while the other starts releasing so in does not really drop drive to the wheels.
Its a good idea to run either throttle reduce or ign cut(outputs in the controller for both). People have run 750nm on the stock clutches at lower clutch pressure levels than we do. around 900nm on stock clutches, closer to 1300+ nm on upgraded clutches. The gearsets seem to take pretty much whatever you are able to put into them :D You mentioned it's a good idea to reduce throttle or cut ignition. I'm guessing clutch wear if you don't? |
Great work! Pleased to see it running :cool:
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Originally Posted by patsmx5
(Post 1551292)
This is the most winning thing I've seen in a long time.
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I was honestly pretty OK with the shifting in the Miata video. That's 7 available gears and consistent shifts about as fast as you could realistically expect to do yourself with an H pattern, but with the ability to do it EVERY time.
Then i saw the E30 video. Holy hell. Yusssss. |
Originally Posted by curly
(Post 1551339)
If you’ve ever driven a BMW DCT, sport/m-mode is a pretty drastic different. If that’s equivalent to non-sport mode, then the final tune will be pretty incredible.
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