rusefi.com

Hellen 88 BMW is an open source PnP dev board for @stefanst's e36 see https://rusefi.com/forum/viewtopic.php?f=2&t=2050

https://github.com/rusefi/hellen88bmw/

https://github.com/rusefi/rusefi/wiki/Hellen-88-BMW

Schematics draft added to https://github.com/rusefi/rusefi/wiki/Hellen-88-BMW

Getting closer!

AndreyB wrote: ↑

Wed Jul 07, 2021 3:02 am

Schematics draft added to https://github.com/rusefi/rusefi/wiki/Hellen-88-BMW

Just attempted to place the order! Schematics link updated last chance to find issues while I am working with JLC on placing the order.

I figured out how to get the BOM but cant find any PCB schematics for this particular board or a for sale link in your shop

how does one go about acquiring a hellen88 pin for BMW ?

https://github.com/rusefi/rusefi/wiki/It's-complicated

Are you sure you have the BOM?

This board is still being developed. Issues were discovered and first order attempt was cancelled. Progress was done today, I hope to order first batch in September.

https://rusefi.com/docs/ibom/hellen88bmw-a-ibom.html


yah... the BOM is listed on your wiki....


at any rate looking forward to updates thanks for the reply

Stefan says it fits inside the case nicely, stay tuned for test results!

Adding a couple more case fit pictures for the M60 case.

(And no, there isn't anything on that IP anymore, it was a note to myself a long time ago)

I have an old 325is from 1995. This is the first car that got to test the new Hellen 88 board. This board is designed as an (almost) plug&play replacement for the Motronic M3.3, M3.1 and M3.3.1 (my car is M3.3.1).
After some initial bench testing to verify that things are unlikely to blow up when plugging it in, we had success starting the engine on the 2nd try. See video below. The first try was unsuccessful because the crank sensor (VR) signal was inverted. Quick jumpering on the board corrected that issue and the car fired right up:


Idle control works too:


Find the car on rusEFI online:
https://rusefi.com/online/?vehicleName=325is&user_id=554&sorts[uploadedMsq]=-1&sorts[uploadedLog]=-1

Picture of the re-jumpered board:

Available for sale. Definitely a development board not a PnP ECU

https://www.ebay.com/itm/334235601464

Open source https://github.com/rusefi/hellen88bmw/

On this and some other boards there is an option to use either dumb or smart coil

For smart coil a wire/0R resistor/jumper should be installed in while positions. If your board comes with IGBT in red position it would easier to remove a fuse (brown)

For dumb coil an IGBT should be installed in red position while white jumper is not installed.