[Jimbo]

Hi Folks,

This is Jimbo from the YouTube channel Robot Cantina. For our current project, we installed a 420cc predator engine in a Honda Insight to make a street legal go kart. Believe it or not we got the car up to 64 MPH with the stock predator engine.

Anyway we are modifying the 420cc engine with EFI and eventually a tiny supercharger. The first EFI kit we tried was MotoEFI and the car runs and drives, but the MotoEFI ECU has limited capacities. The Motoefi kit will not allow a wideband or forced induction and that is a deal breaker.

The next logical choice is Speeduino, but before I order something, I want to make sure of the following.

Will Speeduino work on a single cylinder engine?
Will it allow Alpha-N / Speed density blend?
I assume it allows wideband, but at this point I'm not assuming anything.

I would rate myself as an advanced user and have done a few MS builds in the past Is Speeduino the way to go for our YouTube project?

[theonewithin]

Please read the wiki.

I can tell you this though.

A single trigger won't work on Speeduino for ignition.

You will need a proper toothed wheel (8-1 at a minimum 36-1 preferred)

No blended. There are other options you can use instead (switched maps)

https://wiki.speeduino.com/en/Hardware_requirements

[Jimbo]

The manual on the Wiki page helps a lot, however I do have a concern. The older version of speeduino "Overview" indicates the ECU will support single cylinder but the manual on the wiki page makes no indication of that.

As far as the crank trigger, a 36-1 wheel is not a problem to fabricate and is preferred.

So I guess I will refine my question.
Will Speduino support a single cylinder engine with a 36-1 crank trigger?

[dazq]

There have and are plenty of single cylinder engine fitted with speedy, search on here and you will find two and four stroke installs.

[Jimbo]

There have and are plenty of single cylinder engine fitted with speedy, search on here and you will find two and four stroke installs.

Easier sad than done, I searched 1 cylinder, single cylinder, motorcycle, lawnmower, predator, Honda GX and a few more. None of the threads offered any real information.

So far the best I could come up with is the NOS2 speeduino.

Since this sub forum is called "getting started" I figured perhaps someone could point me in the right direction.

Anyway the NOS2 indicates it has a O2 input which is completely logical, however It doesn't mention that it is compatible with wideband. Now I assume it is, but that's the same assumption I made with MotoEFI and I was wrong.

Its a little frustrating dealing with open source stuff because doing a google search yields a lot of information, and most of it is outdated. So that's how I ended up here... sort of trying to get the best updated information available.

[LAV1000]

Think you are looking for the NO2C:
https://wiki.speeduino.com/en/boards/3r ... _Speeduino

[LPG2CV]

You should not have an issue running a one cylinder engine
I'm not aware of an official speeduino board that doesn't support wideband.
You can download Tunerstudio (search the web), and download a Speeduino ini file from github. https://github.com/noisymime/speeduino That will enable to to see the features that Speeduino firmware currently has. Download the zip and see loads of useful stuff like board schematics, base tunes etc.

[purplelightning]

Jimbo! I've been following your project on YT with interest as I have a couple of single cylinder projects myself. One of them being essentially the 420cc predator you're working on, another being a mini bike engine for gokart racing use. Glad you cam across speedunio.

Up until today I thought Speeduino could be triggered with a single pulse, but I guess not. Another alternative to a trigger wheel is to use a trigger board like this: https://invisiblefuelinjection.co.uk/sh ... trigger-pc

Anyway, during the process of figuring out my stuff, I've come across a few different projects using Speeduino that are more paired down for single cylinder use. The challenge right now is actually getting any kind of speedy in your hands.

Here's some projects that I've found in my research for you to review.

Blitzbox: https://github.com/oelprinz-org/BlitzboxBL49sp
Nick Z's Standalone ECU: viewtopic.php?f=16&t=2926
Speedunio XS: https://youtu.be/OmAfNGKYG2A | https://drive.google.com/drive/folders/ ... poykbv7i0x
Klotzya550's: viewtopic.php?t=4503&start=20
Matt Matts motorcycle ECU: https://www.facebook.com/groups/Speedui ... 408834344/
NO2C (Of course): https://wtmtronics.com/product/no2c-v0-2-x/

All of these support wideband, once even has a controller on the board which is nice. As others have said, I don't think there are any out there that do not have wideband support.

[theonewithin]

You can use a single pulse. But only for fuel. Not ignition.