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MartO
Total Likes: 1
Original Post (Thread Starter)
#847224 07/28/2026 10:35 AM
by MartO
MartO
A pipe dream: pedal box / hydraulics from a Plus Four, manual box from BMW or Toyota. Fix to electronics, traction control... required?

Has anyone ever given this any deeper thought?
Liked Replies
#847244 Jul 28th a 02:50 PM
by JohnHarris
JohnHarris
Yes just a google search...it brings up the AI overview and then you can drill down further with supplementary questions on the subject matter it raises. So I asked about Supra manual gearbox and ecu transplant to a Morgan Plus 6 and the following popped up.

AI overview


I f you introduce the manual Supra gearbox transplant into the Plus 6 and whether that ECU is also a good start Yes, the mechanical parts of a modern 6-speed manual Toyota GR Supra (which shares its BMW B58 engine architecture with Morgan) will physically bolt up to the Morgan Plus Six, but the ECU will not directly transfer. While the hardware fits, swapping the electronics introduces significant digital and software roadblocks.⚙️

Hardware Compatibility

The Engine block:

Both the Toyota Supra and the Morgan Plus Six utilize variations of the BMW B58 3.0-litre inline-six engine. Because they share the same block footprint, the Supra's manual transmission bellhousing will line up perfectly.

Cabin Modifications:

You will need to source or fabricate a clutch pedal box, master cylinder plumbing, and a modified center console to clear the manual shifter assembly within Morgan’s tightly packaged cabin.🖥️

ECU & Electronics Challenges

The Anti-Theft Lockout:

You cannot simply swap the Supra's ECU into the Morgan. Modern BMW/Toyota ECUs use a heavy cryptographic security handshake (Immobilizer / EWS) tied specifically to the donor vehicle's key fobs, instrument cluster, and chassis.

Coding and Integration:

The Plus Six is factory-configured purely for the ZF 8-speed automatic transmission. Attempting to use the Morgan ECU with a manual will cause limp mode due to missing automatic transmission control module signals.🔧

The Real-World Solution

Instead of transferring the Supra ECU, top custom build shops use aftermarket engine management or specialized reprogramming:

Keep the original Morgan ECU.

Flash it with custom software overrides (such as those from BMW tuners like Litchfield Motors) to trick the module into believing it is running in a manual configuration.Flash the system to suppress all missing automatic transmission error codes.

These are AI suggestions supplementary questions you may want to pursue


Would you like to look into aftermarket standalone ECUs that support the B58 engine platform?
Are you trying to figure out the specific BMW/Toyota part numbers needed for the manual flywheel and clutch assembly?
Do you need information on specialist custom tuners who handle manual conversions on modern BMW-powered platforms?
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