DCT / Dual-Clutch Gearbox on 13b engine ?
#77
10000 RPM Lane
iTrader: (2)
Experienced DIY’ers aren’t likely to need these, but a few diagrams Neal sent me for the adapter/trans mounting:
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estevan62274 (06-10-22)
#78
Lives on the Forum
iTrader: (6)
I think I am now set with all the parts for the conversion. Just picked up a 2019 F87 M2 DCT transmission with 1,600 miles on it. If I am correct, the F87 is the same transmission used in the F80 F82 M3 M4 cars and has the same gearing ratios. I guess I will see once the gearbox shows up.
The vision of a DCT paddle shifting 20B FD is on its way! Thanks again to Neal for putting this together and Sean for all of your support.
The vision of a DCT paddle shifting 20B FD is on its way! Thanks again to Neal for putting this together and Sean for all of your support.
Last edited by David Hayes; 05-29-21 at 06:11 AM.
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Islander (05-29-21)
#80
Lives on the Forum
iTrader: (6)
^ None that I can think of. The question would be, will the DCT transmission fit into the Cosmo? Maybe you would have to do some shaping of the tunnel? The other question is what ECU are you running? The stock or aftermarket? That answer would dictate which of the transmission ECU controllers you would use, with the HTG being one that works with an aftermarket ECU and the MaxxECU a complete standalone unit.
#82
Senior Member
iTrader: (16)
thanks for the reminder, saw this the other day, a bit hokey in typical youboob video fashion tho’ … pretty sure it’s based on the kit being discussed in this thread
https://youtu.be/0AZzjQTV-F4
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https://youtu.be/0AZzjQTV-F4
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He was at the “ Lost in the 90’s “ meet on Sunday here in md. It’s a neat setup and I’m sure it rips.
~ GW
#84
Rotary Freak
Seems Turbo Lamik is winning hearts and minds locally, although I understand Raceonly was doing a HTG install a few weeks back.
#85
Goodfalla Engine Complete
iTrader: (28)
Another option is close!
We just finished up the hardest parts of a solution for a manual rear iron with DCT. This is not meant to cut in on Islander (uses the I6 bell housing DCT) but instead to meet the needs of a different part of the market:
Our kit is for those wanting to use a manual rear iron without any cutting, and for the larger BMW V8 bell housing Getrag DCT.
Bolt-On. No cutting.
Currently finalizing a couple secondary items.
Low profile adapter.
Clearance at the firewall. OEM heater pipe still fits.
Our kit is for those wanting to use a manual rear iron without any cutting, and for the larger BMW V8 bell housing Getrag DCT.
Bolt-On. No cutting.
Currently finalizing a couple secondary items.
Low profile adapter.
Clearance at the firewall. OEM heater pipe still fits.
Last edited by Monkman33; 09-07-21 at 06:02 PM.
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jkstill (12-03-21)
#87
Goodfalla Engine Complete
iTrader: (28)
This is the V8 bellhousing DCT. That hump on top was where the BMW starter location was. The engine is mounted with the 13B-REW rear iron in the position of factory (or at least very close to) using FFE motor mounts. This design is situated for a bolt-on solution, but does not preclude anyone from possibly making modifications to use it in other ways. We just wanted to start with a no-chassis/iron-mods needed foundation and let people go from there.
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gmonsen (09-08-21)
#89
Goodfalla Engine Complete
iTrader: (28)
The thin design only really works with the V8 bellhousing. In order to use this design with the I6 bellhousing, we would have to lengthen the adapter to the point where the savings of thickness would be less than half an inch from Islander's kit. Maybe I'm wrong, but anything less than an inch of thickness savings seems like not enough to justify adding a second, more expensive, option to a relatively small market with the I6 bellhousing.
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gmonsen (09-08-21)
#90
Hoo Hoo Hoosiers
This is the V8 bellhousing DCT. That hump on top was where the BMW starter location was. The engine is mounted with the 13B-REW rear iron in the position of factory (or at least very close to) using FFE motor mounts. This design is situated for a bolt-on solution, but does not preclude anyone from possibly making modifications to use it in other ways. We just wanted to start with a no-chassis/iron-mods needed foundation and let people go from there.
Last edited by kelldog44; 09-08-21 at 10:23 AM.
#91
Goodfalla Engine Complete
iTrader: (28)
Monkman any timetable on when a kit would be available? Also curious how you were able to make the auto starter work without cutting the eyelet off the side. I designed an adapter plate plate for the V8 bellhousing but the starter gear's intersection with the flywheel requires cutting the manual rear iron to basically turn it into an auto rear iron. I 3D printed it and could not figure out a way to mount the starter without cutting the bellhousing or cutting the rear iron
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#92
Hoo Hoo Hoosiers
We are hoping in a couple of weeks or so. We came to the same conclusion as you and opted not to use the auto starter. I will make a thread with complete information soon as we only have potato-phone pics and want to present in a more polished manner with all of the peripheral pieces complete as well. Lots of good news. Plus, we have been testing best install methods and such so we will have some feedback there as well.
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Monkman33 (09-08-21)
#93
10000 RPM Lane
iTrader: (2)
sounds good to me, you guys can go buy up the other V8 DCT trans model then ... I do see your point about the iron, but didn't really consider it that big of a deal. The machine shop can trim that down no problem. If you can avoid it though, then why not.
I'm moving forward with a CD009 conversion first and saving the DCT for my other RX8 down the road, just ordered a new trans from the Nissan dealership today with the Labor Day discount. Hopefully the DCT controls and such will all be further advanced and simpler when I get to that point.
I'm moving forward with a CD009 conversion first and saving the DCT for my other RX8 down the road, just ordered a new trans from the Nissan dealership today with the Labor Day discount. Hopefully the DCT controls and such will all be further advanced and simpler when I get to that point.
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Darkning (09-08-21)
#94
My initial question was regarding the swap most of the thread was talking about. Currently the Cosmo drivetrain is almost 100% stock. After I finish the convoluted registration process and have enough walking around money, I’d like to make some pretty big changes too. Since spare time is not something I have much of thanks to my profession, I’m definitely going to have a reputable shop do any major work.
#95
The Ancient
Not sure if this will work, but I found a video of a DCT Rx7 on Sanjay Singh's car. Its a Neal Adderley conversion.
https://www.facebook.com/messenger_m...w9NF8njao-VoqW
https://www.facebook.com/messenger_m...w9NF8njao-VoqW
Last edited by gmonsen; 10-20-21 at 10:58 AM.
#96
Rotary Freak
iTrader: (7)
Hey all, I wanted to share some more DCT RX7 progress. My FC is no longer rotary-powered, but besides the adapter plate, the rest of the setup should be applicable. Happy to answer any questions since there aren't a whole lot of people running this swap yet.
Here's the rundown on my whole setup:
The GCU takes a lot of tuning to get driving nicely. There are several maps and it's quite different than tuning an ECU.
So far, I've put over 300 miles on the car this month with the DCT and am really enjoying it. I'm only making around 500whp/500wtq at the moment on 7psi. The stock DCT clutches are usually good for up to around 650wtq in the heavier BMWs. I'm hoping I can get away with not having to spend $$$ on new upgraded clutches. Unfortunately the New England weather is pretty much done for the year and the roads are already salty. I plan on doing some small improvements over the winter and putting lots of miles on it next year.
Here’s a short video of the DCT in action:
t
Another 3-4-5 quick pull (spinning):
https://imgur.com/QhVRq26
Another 3-4-5 pull hooking
https://imgur.com/OEeMa4J
Here's the rundown on my whole setup:
- 5.3L alum. block LS. Small cam, dual valve springs, pushrods, otherwise bone stock.
- Twin EFR 6758s and Tial MVRs
- F10 M5 (big V8) DCT
- MaxxECU Pro for the engine management only
- HTG GCU for the DCT control
- Domiworks DCT adapter with custom 25# flywheel
- Domiworks PCB and wiring harness and wiring service
- SLG driveshaft adapter
- Custom paddle shifters by me
- Blink Marine keypad
- BMW F80 shifter (yet to be configured)
The GCU takes a lot of tuning to get driving nicely. There are several maps and it's quite different than tuning an ECU.
So far, I've put over 300 miles on the car this month with the DCT and am really enjoying it. I'm only making around 500whp/500wtq at the moment on 7psi. The stock DCT clutches are usually good for up to around 650wtq in the heavier BMWs. I'm hoping I can get away with not having to spend $$$ on new upgraded clutches. Unfortunately the New England weather is pretty much done for the year and the roads are already salty. I plan on doing some small improvements over the winter and putting lots of miles on it next year.
Here’s a short video of the DCT in action:
Another 3-4-5 quick pull (spinning):
https://imgur.com/QhVRq26
Another 3-4-5 pull hooking
https://imgur.com/OEeMa4J
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#98
Rotary Freak
iTrader: (7)
The Maxx only controls the E90 transmissions, which are a 1:1 7th gear. Even if I put 2.73 gears in my 8.8" diff, that's too much gear. The HTG can control the F-series DCTs, which gave a .67:1 7th. I'd honestly still prefer even longer gears and may swap to a 3.08:1 diff. I have gobs of torque and would rather have a more comfortable highway gear. The 1st on tbe DCT is 4.8:1, so it's not like 3.08s will make it hard to drive! The Maxx Is also limited to the stock BMW TCU. HTG can run bigger clutch pressures and hold more torque. But I'd say the Maxx would definitely be easier to set up out of the box and require less tuning.
#99
Rotary Enthusiast
iTrader: (8)
The Maxx only controls the E90 transmissions, which are a 1:1 7th gear. Even if I put 2.73 gears in my 8.8" diff, that's too much gear. The HTG can control the F-series DCTs, which gave a .67:1 7th. I'd honestly still prefer even longer gears and may swap to a 3.08:1 diff. I have gobs of torque and would rather have a more comfortable highway gear. The 1st on tbe DCT is 4.8:1, so it's not like 3.08s will make it hard to drive! The Maxx Is also limited to the stock BMW TCU. HTG can run bigger clutch pressures and hold more torque. But I'd say the Maxx would definitely be easier to set up out of the box and require less tuning.
Ah cool, thanks. I think I knew about the E90 requirement but I blanked, nice to hear that it wasn't an issue of Maxx dropping the ball (other than the stock requirements and lack of support for your specific transmission).
#100
Rotary Freak
iTrader: (7)
The Maxx also uses the stock BMW TCU and firmware, which has pressure limitations for reliability and warranty. Which means reduced torque capacity. I believe they can be reflashed with different firmware (E90 M3 GTS?) but unsure if it gets you all the way to maximum like the HTG can.