BMW M10B20 520i E12 ' 75 MSEXTRA

[VictorGarage]

going to next project on this type of car and basically it have twin carburetors
and im going to make it EFI with the M10B18 intake, injectors, fuel rail, TB, etc.
All the EFI kit donor comes from the 318i E30 '89
going to run with stock 60-2 Trigger wheel

if anyone have the experience before, please advice me
anyway, im using v2.2 board

[bertjeconti]

I am converting my bmw E12 to megasquirt at this very moment.
My project is about half done. My E12 has the 2 liter 6 cylinder engine, but basics are realy the same.
At this moment the engine is running spark on the megasquirt, but still running its gasoline slurping Solex 4 barel carburettor.

I have redesigned the MS2-V3 board to my needs and designed a new PCB for it. going to run fuel and spark. spark in wasted spark mode, injection in semi-sequential mode. Therefore 3 injector banks are needed and ofcource 3 coil drivers. the PCB also offers a driver for the 3 wire idle valve and a knock detector circuit.

I've also bought a donor engine to spend the needed parts as there are:
- triggerwheel
- sensor mounting bracket
- intake manifolt
- injectors, fuelrail and pressure reguator
- throttle body
- lost of wire and connectors
- air filter box
- idle air valve
The donor engine is a M20B20 motronic from a E30.

The Throttle position sensor for Motronic cannot be used because it only gives a contact at closed or wide open throttle. Ebay gave me a new one that fits on the throttle shaft and gives a signal analog to the position, only need to make a suitable bracket.

The Triggerwheel sensor (VR) wasn't on the donor engine, so i needed a new one.
From ebay i purchased a sensor for the M52 engine, which is in fact a Hall sensor. A Hall sensor does not need a interface to clean up the signals, and thus makes life a little bit easier. This Hall Sensor turned out to be a perfect fit in the stock sensor mounting bracket.

Lots of info and pictures about my build can be found here:
http://www.bmwe21.net/forum/viewtopic.php?f=3&t=21955

Take your time for planning and gatherhing info and parts. Test whatever possible before modding your engine.

[Matt Cramer]

if anyone have the experience before, please advice me
anyway, im using v2.2 board

That's not a good fit for this project, but you could use an LM1815 circuit to build a conditioner for the BMW VR sensor.

[VictorGarage]

I planned on using a zeal engineering daughter card...
What u think of it matt?

[Matt Cramer]

It would work, but why not spend the extra $15 and start with a V3.0 board?

[VictorGarage]

Yess after all v1.3 is much much better and simpler dan v2.2
But i still got some of v2.2 left
So i need to forced myself to use it

[Matt Cramer]

Um, there isn't a V1.3 board (except the MSPNPs).

[proturbo]

Hey hello matt...
My e12 m40b18 engine is fired up already now... and up and running...
But need to be sure...
Is it the same exactly setup and config files with peugeot 405 1.8L motronic... ???
I need some fix trigger pos and config setup..

Im using v2.2 with zeal engineering and oem vr sensor with 60-2 wheel decoder..
Also oem ignitor...
Running oem distributor
My m40 engine comes from e36

[Matt Cramer]

I would be extremely shocked if it was the exact same tune file, but the trigger wheel settings may be close. Peugeots are extremely rare in the US; we have never had one in our shop. The final measure of if your trigger settings are correct will be to check with a timing light.