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For discussion of Speeduino compatible boards designed / built by other members of the forum and for guidance around making such a board
By Alan khoo
#49999
Hi Raku,

Will it be possible to use this with as replacement to stock M20B25 motronic 1.3 ECU which has a zf4hp22 TCU set up?

Currently running an ethos chipped ECU with hx35 0.6 bar and is interested in getting speeduino as an upgrade to replace AFM to MAP with tuning ability.

Appreciate to have your input. Tqvm
By dazq
#50015
Alan khoo wrote:
Sun May 02, 2021 3:17 pm
Hi Raku,

Will it be possible to use this with as replacement to stock M20B25 motronic 1.3 ECU which has a zf4hp22 TCU set up?

Currently running an ethos chipped ECU with hx35 0.6 bar and is interested in getting speeduino as an upgrade to replace AFM to MAP with tuning ability.

Appreciate to have your input. Tqvm
Assuming your gearbox has its own ECU separate from the the engine one it may be possible to interface it to speedy.
You need to work out what the interface is ( serial, can or what ever) and the Comms protocol (if there is one) to design the interface to speedy.
By pazi88
#50016
Alan khoo wrote:
Sun May 02, 2021 3:17 pm
Hi Raku,

Will it be possible to use this with as replacement to stock M20B25 motronic 1.3 ECU which has a zf4hp22 TCU set up?

Currently running an ethos chipped ECU with hx35 0.6 bar and is interested in getting speeduino as an upgrade to replace AFM to MAP with tuning ability.

Appreciate to have your input. Tqvm
That's so old automatic that it probaply only has rpm input from ecu via same wire as tacho does. So it will probaply work fine.
By Alan khoo
#50024
Raku, Dazq, Pazi,

I last read that the TCU take reading from AFM via ECU output signal and vice versa to have a smooth transition. Time being it ran fine except the messy piping route from AFM to the hx35 inlet.

I wish to maintain the autobox minus AFM for traffic convenience. Not looking for huge WHP gain, just a little to get some extra push to the e34 . Just a project while learning. Seen someone did an Arduino TCU replacement. Probably that's the next step once I am able to digest.

Once I get the board, be in touch again. Thx for the assistance.
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