rusefi.com

I'm just getting started converting a 91 Honda Acty (JDM mini truck) to EFI. It has the E07A, 3 cylinder SOHC 12 valve engine producing about 38 hp. I plan to turbocharge the engine in the future. I've just ordered a microRusEFI, I think it will be perfect for the job. Carb will be replaced with a throttle body from a Honda Pioneer 700, which includes TPS, MAP, IAC stepper, and a single fuel injector. The engine has a distributor which I may retain for simplicity, but have been considering switching to individual coil on plug.
I have some questions about the triggers.
If I use the distributor I would have a 3 tooth cam trigger. I believe that is all that's needed for one injector and one coil, but how do I set it up in the software? Trigger setup in Tunerstudio is very confusing compared to other ECUs I've used.
If I switch to individual coils, what would be the preferred trigger wheel? I have the ability to make and fit any type of wheel, but I would prefer to keep it on the distributor (camshaft speed) for simplicity. Is there any advantage to having two triggers when there is only one injector?

Thanks

Welcome!

Yep, trigger menu is a bit confusing, we know that and hope to improve one day once we get more software developers involved. Sounds like skipped wheel, total = 3 and skipped = 0? Please give it a try and upload to https://rusefi.com/online

MadGoatCustoms wrote: ↑

Thu Feb 24, 2022 1:48 pm

If I use the distributor I would have a 3 tooth cam trigger. I believe that is all that's needed for one injector and one coil, but how do I set it up in the software? Trigger setup in Tunerstudio is very confusing compared to other ECUs I've used.

Andrey is right, you should be able to set it like this:

MadGoatCustoms wrote: ↑

Thu Feb 24, 2022 1:48 pm

If I switch to individual coils, what would be the preferred trigger wheel? I have the ability to make and fit any type of wheel, but I would prefer to keep it on the distributor (camshaft speed) for simplicity. Is there any advantage to having two triggers when there is only one injector?

The engine may start marginally quicker with a crank-mounted wheel (in addition to something at cam/dizzy speed), but there's not really any real benefit over a single dizzy-mounted trigger wheel.

What kind of sensor do you have? The sensor will have some limitation on minimum tooth size, which could be a problem if making something that goes in place of a distributor (there's only so large a wheel you can fit, so you might be limited on tooth count). If you can fit a 24-1 (24 tooth spacing, one tooth missing) wheel, that's a great start. 12-1 is probably workable if 24-1 results in too small of teeth. And on the flip side, if you have the space, 36-1 or 36-2 is even better.

I was thinking it may work with those settings, just wasn't sure about using 0 for skipped tooth. Thanks for the confirmation. I'm leaning towards scrapping the distributor and going COP. Parts for these are kinda hard to get in the US, so anything I can replace with common domestic parts is a plus.

I haven't chosen a sensor yet, but I'm considering DELPHI SS11367, it's a hall sensor made to fit inside a GM distributor. It requires a cup type wheel which is a bit more difficult to make, but it's a nice small sensor that's easy to mount. Like you said I'm not sure how well the typical cylindrical type sensor will work on a small wheel. I'm open to suggestions if anyone knows of a small inexpensive sensor.

I just realized stepper IAC is not working with MRE? And there's no way to set up dual custom trigger wheels?

I am not aware of a good reason to have custom dual wheel, please help me understand the value of that setup

MRE hardware might support stepper but firmware might not. overall I am not sure if anyone in rusEFI is using stepper. We kind of have the code but we have very little priority for stepper - for us it's either solenoid or full ETB.

AndreyB wrote: ↑

Sat Feb 26, 2022 4:06 pm

MRE hardware might support stepper but firmware might not. overall I am not sure if anyone in rusEFI is using stepper. We kind of have the code but we have very little priority for stepper - for us it's either solenoid or full ETB.

Stepper is supported on MRE since https://rusefi.com/forum/viewtopic.php?f=2&t=2249 .

Dron_Gus wrote: ↑

Sat Feb 26, 2022 6:51 pm

Stepper is supported on MRE since https://rusefi.com/forum/viewtopic.php?f=2&t=2249 .

which raises the question of what info has confused @MadGoatCustoms and what should be adjust where

AndreyB wrote: ↑

Sat Feb 26, 2022 6:53 pm

which raises the question of what info has confused @MadGoatCustoms and what should be adjust where

I received no feedback. That makes me think/hope that no issue with MRE and stepper.

I read another post from a few months ago about IAC stepper not working, and no resolution. The readme on github says it will be supported soon. I could not find any mention of it working. I haven't received my hardware yet, but if it can't drive an IAC I have no interest in using it.

I don't have a need for dual triggers with this project, I'm just thinking about other engines that are not supported. Doesn't virtually every modern engine use at least two trigger wheels? If the engine isn't on the drop down list there's no way to set it up. Nearly every other ECU has an option to set up each trigger input individually.

Any chance you would be available to help us improve documentation by providing exact links to where you have read potentially outdated info?

If you do not need dual trigger let's not discuss it within "Honda Acty 660 3cyl E07A carb to EFI" topic.

Both of the following pages say: Will be supported soon: Stepper IAC support

https://github.com/rusefi/hw_microRusEfi
https://github.com/rusefi/hw_microRusEfi/blob/master/readme.md

Fixed, thank you!!!

(that's just two URLs of same file)

I'm looking at available options for trigger hardware, leaning towards an optical sensor due to the small space available. Can we decode this AEM cam wheel for Nissan? It looks like the Honda 1+24 pattern should work.

We will make it work - if it does not work as Honda 1+24 we will add new trigger shape.

MadGoatCustoms wrote: ↑

Tue Mar 01, 2022 2:00 pm

I'm looking at available options for trigger hardware, leaning towards an optical sensor due to the small space available. Can we decode this AEM cam wheel for Nissan? It looks like the Honda 1+24 pattern should work.

There's a better option, this one is easier to decode, and we already fully support it: https://www.diyautotune.com/product/50-mm-optical-trigger-wheel-for-nissan-sr20det-or-ka24de/

MadGoatCustoms wrote: ↑

Thu Feb 24, 2022 1:48 pm

I'm just getting started converting a 91 Honda Acty (JDM mini truck) to EFI.

How did that go? I spy https://www.facebook.com/MadGoatCustoms/

MadGoatCustoms wrote: ↑

Tue Mar 01, 2022 2:00 pm

I'm looking at available options for trigger hardware, leaning towards an optical sensor due to the small space available. Can we decode this AEM cam wheel for Nissan? It looks like the Honda 1+24 pattern should work.

We do support this now - "12 tooth crank " plus "single tooth cam" will decode it, along with many similar patterns from honda/toyota.

I postponed the Acty EFI conversion, too many other things going on. I have all parts on hand and all fabrication is done, just need to find time to install and tune it. I took a distributor from some other honda engine and modified it to fit the E07A. I gutted it of everything except the 1x and 24x VR sensors, added a signal conditioner board so I have nice clean 5v signals out. I'll have to buy another MRE as I've used that for the 1.4 Ecotec swap in another truck.

Andrey, looks like I can't hide! I still have a BMW 760 here waiting for an engine management solution (12cyl + direct injection), so I can swap the V12 into something cool. I'll most likely weld injector bungs in the intakes and run PFI.