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01-17-2024, 11:13 AM | #1 |
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S85 DCT swap
Been following this thread on M5 board for a while, thought you guys might find it interesting. Someone finally got what looks like a good implementation of S85 + our DCT going. He's using a maxxecu instead of the stock DME, but keeping the TCU and stock mechatronics, and looks like getting a comparable driving experience.
S85 swap, here i come! https://www.m5board.com/threads/lets...5#post-7705226
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01-17-2024, 12:35 PM | #2 |
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I saw this on IG. I wonder what the total expense came to be.
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01-17-2024, 12:50 PM | #4 |
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earlier in the thread the guy offered to do it for someone for $10k. don't know if that includes the trans and ecu.. good deal if so. the ecu that can handle a v10 is $3,300
you mean can the aftermarket ECU manage emissions? no idea.
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01-17-2024, 01:22 PM | #5 |
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Howell / Elise Race engineering has done this repeatedly and basically offer an off the shelf solution via a Syvecs (Life Racing) ECU.
They’ll plug in play S65/S85 DCT into whatever you’re excited about. https://www.eliseracing.com/
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01-17-2024, 06:12 PM | #6 |
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I’m thinking a DCT can be had for about 2k ish. Plus the ECU and install would place it around 8-10k if done by someone else. Plus custom tuning
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01-18-2024, 04:41 AM | #7 | |
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01-18-2024, 08:10 AM | #8 | |
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01-18-2024, 08:38 AM | #9 | |
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01-19-2024, 10:39 AM | #10 | |
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I looked into this type of swap religiously when I was in the process of building my 4.4L. It roughly comes out to 1.5x the finished cost of my motor. My guesstimate for an S85/DCT E92 M3:
Alternatively, if you are trying to DCT swap an E60 M5, you can use the HTG DCT TCU. However, that requires modifications to the mechatronics unit and works with the OEM DME. The modification is not hard to do; anyone with motorsports electronics experience or electrical experience can perform the required modifications.
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01-23-2024, 09:23 AM | #11 |
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I have heard that's entirely possible to run the S85 with the MSS60 which already has tables and stuff for the DCT integration.
If that's true you could likely get an S85 running in an E9x with all OEM electronics. |
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01-23-2024, 10:22 AM | #12 |
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i think it's theoretically possible but practically difficult. again same thread, there were guys going down that path that got stuck. i know nothing of their qualifications and doesn't mean someone else can't, but i just know the outcome.
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01-23-2024, 10:43 AM | #13 | |
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Awron has made a can gateway, but that is expensive already and NLA. additional note: i remember reading some guy said his S85 DCT Swap into a E46M3 was around 100K all in with car/parts/labor included. i wouldn't be surprised if the labor was almost half the cost of the build. Which is this car.. and amazingly.. they used a E9X MPE V2 rear section lol.
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01-23-2024, 02:14 PM | #14 | |
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Yeah, the CAN buses in the E60 and E90 use the same basic structure (PT6) but there are probably some differences in what messages are broadcast. The DCT uses data from all over the car so I think it would be easier to integrate an S85 into a DCT car than put a DCT into an S85 car. |
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01-23-2024, 02:42 PM | #15 | |
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01-23-2024, 03:01 PM | #16 | |
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01-23-2024, 10:12 PM | #17 |
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It’s a lot. It uses multiple different formats of engine torque from the DME, uses various things from the cluster (for some reason,) Drivelogic settings from the DME, the IMU data from the DSC sensor under the seat, uses all four individual wheel speeds, all four individual brake pressures, etc etc.
The DCT is the single most complicated thing in an E90, by a long ways. I’m not sure if the E60 platform has all of those things available on the PT-CAN because it never had a reason to. It wouldn’t surprise me if it did but also wouldn’t surprise me if it didn’t. Spoofing everything necessary for the DCT to be happy would be an immense amount of work. |
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01-24-2024, 05:10 AM | #18 |
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you are going to modify the dme to work? jim colley went down this road, took peoples money and was not able to make it work as far as the public knows. anyways, smg works for the e60 m5 im not sure why so many people have desired to put a dct onto the s85 other than for, smoother shifts? I work on the s85 cars frequently and the smg systems more frequently but IMO nothing shifts with the ferocity of smg in s6. the thing literally slams every shift.
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01-24-2024, 06:18 AM | #19 | |
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01-24-2024, 08:24 AM | #20 | |
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01-24-2024, 08:56 AM | #21 | |
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01-24-2024, 08:58 AM | #22 |
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not looking to make this into a debate but if youre expecting an SMG to drive like an automatic youre going to be disappointed. its a manual transmission at the end of the day which can shift consistently faster than a manual.
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