Another Engineer

[neongreen]

Hi everybody!

I'm a mechanical engineer living in SE Michigan. I do driveability evaluation for an OEM, so it's safe to say I am interested in cars. My current project is a 1962 Ford Falcon with a 5.0L V8 and 5 speed, currently running on MS2. I've set up a few ECUs over the years and really enjoy playing with engine controls. I somehow stumbled across RusEFI and have to say I've been pretty impressed. The feature set, the speed of development, the price... I like it all.



Anyway, I'm considering switching over to using the MicroRusEFI for two reasons. First, I want E-throttle. I have an ITB intake on this engine with massively oversized throttles (52mm on a mildly modified pushrod 5.0), which makes the mechanical throttle rather touchy. Second. I hate the MS2 db37 connector. I want more robust packaging.

So I have a couple questions.
MRE has 4 injector drivers. There is no possibility for V8 sequential fuel? I'm assuming it's ok to put more than one injector on each driver for semi-sequential?
MS has an ITB tuning mode: http://www.msextra.com/forums/viewtopic.php?f=101&t=34883 Any plan to add something similar?
I didn't notice anything about knock sensing on the MRE, does it have that feature?
Has anyone ever made a rev-matching function on a RusEFI ECU?


Thanks in advance
Jesse

[AndreyB]

Hello and welcome!

microRusEfi is really a 4 cylinder ECU. Running two of those is... not great user experience but something you can probably do right now.

https://rusefi.com/forum/viewtopic.php?f=4&t=1646 still requires manual assembly, this might get improved one day but not today. Also we do not have a plan for mass-milling of cases.

https://rusefi.com/forum/viewtopic.php?f=4&t=569 is something you can buy assembled today and solder on a TLE7209 extension board to get ETB.

We have developers available to implement code to cooperating users. In exchange for your experience and you data I bet a lot could happen on software side

[AndreyB]

microRusEfi has zero knock sensing hardware.

Frankenso which you can buy today assembled has knock sensing which we never got to produce trustworthy results. We need a mechanical engineer who would get us that last mile of taking Frankenso and showingus clear signs of knock in the logs, and we will finish the code. See where I am going?

Prometheus has similar knock sensing hardware but only assembled yourself option.

Proteus does not have knock sensing hardware as of today if I understand it right.

[AndreyB]

Before covid-19 I used to visit Ann Arbor four times a year for my not car related job. In my not car related office there are too many managers who are ex-Ford IT managers

[neongreen]

Hey Andrey,

I work in Ann Arbor and live nearby, so if you ever end up coming back out here we'll have the opportunity to meet up.

So it sounds like my options are Frankenso or MicroRusEFI. Obviously Frankenso is the more capable ECU.

Why do you recommend against running two injectors per driver on the MRE?
I was poking around the parameters in Tunerstudio and the pinout, I didn't notice if there was a cam input. Would this take a 0-5v cam input (my motor has an optical cam sensor)?
Does MRE have flex fuel functionality?
I guess I just lean more towards the MRE because of the cost, native e-throttle, and small form factor. I could buy it without too much protesting from my wife.

Am I correct in believing that the Frankenso can be made to run V8 sequential? How would I get my hands on a TLE7209 extension board? One other small thing that makes me favor the MRE is the ECU connector on the wiring side. Where could I find the Denso wire harness side ECU connector with crimp terminals? I could afford this ECU as well, I'd just have do a lot more negotiating with the wife (she's a big fan of my car hobby, somehow she didnt notice that minor detail when she married an automotive engineer who spent all his time on a car project ). If I went this route I'd be happy to test out the knock sensing, but this engine might be pretty hard to make knock with it's 9:1 compression! Can you elaborate on the lack of trustworthy results from the knock sensor in previous testing? What would you need in order to consider it "clear signs of knock"?

Anyway, I'm looking forward to hearing more and hopefully contributing to this project.

[AndreyB]

I am a software engineer thus I am not qualified to comment, but the message from electrical engineers is that running 8 injectors with microRusEfi would exceed temperature dissipation limits of it and/or would be on the edge of the capabilities of TLE8888 chip. Lower rev is probably fine, higher rev would put more work on the injectors and there might be a limit somewhere. This was all never tested.

Trigger input page has poor usability but short story is obviously we support cam sensor, supporting any reasonable trigger input is the least of concerns for rusEfi hardware and software.

We have no code for flex sensor frequency-based sensor, we have no code for flex fuel logic. microRusEfi is limited with aux digital inputs.

TLE7209 module I will just add into the package. 64 pin mostly-crimped used pigtails I have for sale.

Knock data - sensor output was either knock data or weather on Mars, we never figured it out. There were better results with ion sensing actually see youtube.com/watch?v=g6YsVTBH334

Frankenso has started a v12 on 11 cylinders in fully sequential mode. One wire was loose somewhere but who needs 12 cylinders when you have 11 working.

[neongreen]

Frankenso has started a v12 on 11 cylinders in fully sequential mode. One wire was loose somewhere but who needs 12 cylinders when you have 11 working.

Where can I find some documentation on what changes have to be made to run V8 sequential?

[AndreyB]

Where can I find some documentation on what changes have to be made to run V8 sequential?

I do not follow. What changes? it just works out of the box. https://rusefi.com/wiki/index.php?title=Manual:Hardware_Frankenso_board

[neongreen]

My mistake. I was looking at the Miata pinout and it only showed 4 injectors. The other schematic showed the 12 injector outputs but I didn't understand the labeling until I looked at the full schematic .PDF.

[neongreen]

Ok, I'm gonna make the jump. I'll be ordering the frankenso, how do you prefer that I order it? Tindie? eBay?

[AndreyB]

Ok, I'm gonna make the jump. I'll be ordering the frankenso, how do you prefer that I order it? Tindie? eBay?

email sent

[AndreyB]

Your Frankenso is hopefully getting to you tomorrow or the day after tomorrow.

What testing hardware do you? An oscilloscope?

Do you have USB to TTL cables like https://www.ebay.com/itm/PL2303TA-USB-to-TTL-Serial-Cable-Debug-Console-Adapter-for-Raspberry-Pi/184243948371 just on case?

$10 eBay logic analyzers are another miracle one can get for $10. https://www.ebay.com/itm/USB-Logic-Analyzer-24MHZ-8-Channel-12C-UART-SPI-IIC-CAN-1Wire-Debug-For-ARM-FPGA/162980270582

[neongreen]

I have a cheap oscilloscope and a multimeter. Just basic stuff.

I don't have the other tools, but could get them if needed.