[Success Story] Classic AUSTIN MINI with Supercharger [microRusEFI]

[JRD McLAREN]

Here is our "after Christmas" project....

It is Austin Mini, classic old tiny car "from England", cheap one.

Engine is "stock" 1 liter inline 4 with Supercharger.
Runs on microrusEFI, wasted spark ignition and single-port injection.
Custom made 36-1 trigger wheel with VR.

Almost all used components are from scrap, except few electronic sensors, injector and fuel pump.
Original distributor and carburetor are "in the pile" ... (waiting for new chance)

First start was 29.12.2021 but first run was 30.12.2021.

[JRD McLAREN]

I need help with Idle Stepper ...

I'm read this https://rusefi.com/forum/viewtopic.php?f=18&t=2234
something in documentation,
this page http://en.rayangyu.com/index.php?c=category&id=23

and I still have not an idea "how it works" ...

Is not problem do wiring for me, but I don't know, how it works on MRE.
It is implemented in firmware .. ?
how to setup and test it .. ?
I need some (external) stepper driver ... ?
or it can be drive by MRE / TLE8888 directly ... ?

Thanks.


Online tune is here: https://rusefi.com/forum/viewtopic.php?f=18&t=2234

PS: AndreyB thanks for upload to YT.

[AndreyB]

@Dron_Gus ^^^

[Dron_Gus]

Stepper was (year or two ago) tested on MRE. It works. Still need some integration into config - ini - tunerstudio.
Still on my TODO list.

[JRD McLAREN]

So, it can stay connected to GP1-GP4. Right ..?

[Dron_Gus]

So, it can stay connected to GP1-GP4. Right ..?

Yes.

https://github.com/rusefi/rusefi/pull/3751
https://github.com/rusefi/rusefi/pull/3749
https://github.com/rusefi/rusefi/pull/3748

Tested. Works.

[JRD McLAREN]

Cпасибо.

[Dron_Gus]

Cпасибо.

1 of 3 is merged. Lets wait for full merge.

[Dron_Gus]

Just for reference.
Idle/stepper dialog is still too complicated.

[Dron_Gus]

All stepper-related PRs have been merged. Please try.
Don't forget to enable "useTLE8888 stepper" option in TLE8888 dialog.

[JRD McLAREN]

We can try tune idle ...
and I have no idea, how MRE initialize idle stepper ..

It must be:
FULL OPEN ..and then almost close ..
or opposite ...
FULL CLOSE and then open little bit ..
??

[JRD McLAREN]

Now we working on two injectors (siamese ports) on 5 port head.
We need full seq, so we have CAM sensor mounted in old distributor..

[JRD McLAREN]

Just for record ... and infos for those users ...
who can make EFI on 5 port head ...

Now we have working car, without any major issues ...

Requierements:
- Crank and Cam sensors for full sequetional mode
- Big injectors - we have only 5ms time for squrit for each cylinder at 6trpm
- Correct Injector phase setup - it is most important setting for this setup
- Good fuel pump and lines - stock lines for carburetor is not enough for EFI

Actual tune is here:
https://rusefi.com/online/view.php?msq=1488

[AndreyB]

Thank you for the summary!