I am posting this here to get some input from Dimitri at MS Labs.

I have a MS3 Basic installed in my track Miata. I am beyond thrilled with the results! I now want to do something similar on another car I own. It comes with some challenges to say the least!

The application is a 1996 Porsche 993 turbo conversion. Currently I have a “tuned” stock ECU from Protomotive. It’s very limited in what it can do but the stock knock control does a great job protecting the engine. It’s a noisy engine so recreating that protection with appropriate filters etc is not something I want to take on. The stock ECU also controls various things and goofy distributor with mechanical advance weights. So with that all being said I want to use MS3 in parallel install just to control fueling and boost. In an ideal world it would be a custom PCB installed inside stock ECU. This would make wiring and sharing inputs easier. I could also cut pins on stock ecu internally to give MS3 Injector control. If not something external with small case like MS3 pro. I would need 2 digital wideband inputs and Flexfuel sensors.

Thoughts?

thanks!!!

 

Do you have a degree in electical/electronics engineering or some other experience in that area? What you are asking for is probably easy with the appropriate knowledge and skillset, less easy otherwise. There are solutions out there that while less sophisticated, have an intended use as a piggyback.

 

Have you read about parallel installs vs piggyback? The latter is not desirable. The parallel installs are common across multiple platforms and standalone ECU’s. I have a complete wiring diagram from someone who has done the same on my car. His was more involved as he wanted the standalone to control spark and fuel. He was left with a stock ECU that controlled gauges, fuel pump and deliver clean OBD 2 ready codes to pass SMOG. Very trick! I want to do something similar but only want to control boost and fuel for now. Possibly spark down the road.

My “ask” to Dimitri is less about feasibility of parallel install and more about making me a custom MS3 PCB to install inside of my stock ECU case. Otherwise the MS3 Pro EVO looks to fit the bill for what I want other than digital wideband inputs (x2)

 

I have executed standalone, diy standalone-parallel with my own developed HW/FW/SW, and piggyback. The best solution is really dependent on the application requirements. For example, does the solution need to maintain streetability and pass local regulations for emissions? Does it need to "play well" with the stock ECU or can it take over the desired functionality without a high degree of integration? Is the data required to spoof or control the various I/O available?

If I was to bid out contract engineering services on something like this, my guess is that it would be a substantial sum.

What are other people doing?

 

I believe MS3 variants can handle multiple wideband inputs via CAN

 

Let’s keep the discussion limited to my ask. The other particulars have already been solved. No need to open the entire scope of work to discussion and dilute the topic at hand.

Thanks for your input though Ted.

Stock ECU case measures approximately 4x6 inches.

I need/want
Outputs
Sequential injection control (6x high impedance)
Boost Control via 4 port (for speed, RPM and flex fuel inputs)
Sequential ignition 12x (for future)

inputs I can think I need right now.
flex fuel
digital wide band 2x
mph/VSS
rpm
temp
map
maf