For discussion of Speeduino compatible boards designed / built by other members of the forum and for guidance around making such a board
User avatar
By La Team Prep
#68729
Hello every one, I kinda bumped into Speeduino looking for an affordable ECU for a Go Cart!
Now I am stuck in it and decided I should give it a try. So I have done my own design and will soon also build an engine simulator so if any folks should build my project they can troubleshoot easily if any problem should rise!

What I love about this "ecu" system is the Tuner Studio Software! Woaw! Amazing, for a couple of dollars, liters of coffee and basic electronics knowledge you can design yourself a pretty good ECU. But you will need the learning curve, no good deal is easy or free, you will have to invest yourself in it!

So Here is my Stage X Project, a packed small form factor version:

4 injectors [Full Seq]
4 COP [ Waisted COP, so I kept only 2 drivers]
1 Flex Fuel INPUT [Important to me because fuel octane levels varies from one dealers to an other and you can switch fuel]
1 Boost Control OUPUT [cause I love the sound of that]
1 High Current OUPUT [You never know what crazy idea you can hook to it]
1 Bluetooth Interface
And all the mandatories, did not keep the Tacho output though for a laque of pins but not a problem for me.

With all that said, thought I could give you a snick pict of the project
By purplelightning
#68735
Nice work! Definitely keep us posted. I've had a project for gokart conversions forever and I'd love to see someone make it happen.

Steal this idea I you're interested in making a product: Use a Sumitomo 33 pin connector and make the pinout match that of the Keihin PG-EFI. Yes, it might be a larger connector, but you get two advantages...

One, it can act as an aftermarket ECU for tons of Honda (Also some Yamaha) motorcycles to use as standalone or conversion ECU.
Two: You can then use the throttle body, injectors and harness etc. from the various motorcycles. Making the conversion option easier for people. The Honda throttle bodies have TPS, IAT and MAP built in. Some have idle control also.

I have a lot of research done on this, but it's lacking implementation and I'm keen to find a partner to help. If you're serious about developing it I'd be more than happy to share the information I have.

Here's one of the engines that I'd like to have an EFI system for. Basically the parts from a Honda Grom would do the conversion.

https://www.youtube.com/watch?v=kj5vQ4znteo


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Last edited by purplelightning on Tue Jul 02, 2024 9:44 pm, edited 1 time in total.
User avatar
By La Team Prep
#68755
purplelightning wrote: Tue Jul 02, 2024 9:37 pm Nice work! Definitely keep us posted. I've had a project for gokart conversions forever and I'd love to see someone make it happen.

Steal this idea I you're interested in making a product: Use a Sumitomo 33 pin connector and make the pinout match that of the Keihin PG-EFI. Yes, it might be a larger connector, but you get two advantages...

One, it can act as an aftermarket ECU for tons of Honda (Also some Yamaha) motorcycles to use as standalone or conversion ECU.
Two: You can then use the throttle body, injectors and harness etc. from the various motorcycles. Making the conversion option easier for people. The Honda throttle bodies have TPS, IAT and MAP built in. Some have idle control also.

I have a lot of research done on this, but it's lacking implementation and I'm keen to find a partner to help. If you're serious about developing it I'd be more than happy to share the information I have.

Here's one of the engines that I'd like to have an EFI system for. Basically the parts from a Honda Grom would do the conversion.

https://www.youtube.com/watch?v=kj5vQ4znteo


Image

Image
Hey, thanks mate for you interest I will definitely check on that connector and will do my best to make it PnP! Anything is possible! Looking for the KiCad Footprint and CAD file as we speak! And also the pinout, so if you have any of those that would be awesome
User avatar
By PSIG
#68782
The trick to universal PnP is adapter connectors or "whips". This was the original concept of the v0.4, where any connector could be mounted to the case end plate, and plugged-in to the on-board IDC to make a PnP. Whatever connector you use, it must be common, to allow users to make short and simple PnP adapters with their connector. The Sumitomo is fine, if it's easy to get the mating connector, terminals, seals, etc, for this purpose. It may not be, as if it was then @purplelightning would have made one. @La Team Prep - what connector is on there now?

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User avatar
By La Team Prep
#68789
PSIG wrote: Fri Jul 05, 2024 4:12 am The trick to universal PnP is adapter connectors or "whips". This was the original concept of the v0.4, where any connector could be mounted to the case end plate, and plugged-in to the on-board IDC to make a PnP. Whatever connector you use, it must be common, to allow users to make short and simple PnP adapters with their connector. The Sumitomo is fine, if it's easy to get the mating connector, terminals, seals, etc, for this purpose. It may not be, as if it was then @purplelightning would have made one. @La Team Prep - what connector is on there now?

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Hey mate!

I'm fine with the connector and I am already working on the project called "Stage X-SM" where SM is for Sumitomo!
The connector I use in my Stage X project is a well available DELPHI HCCPHPE24BKA90F connector but it lacks some more pins, therefore I will use the Sumitomo 6188-4871 in my Stage X second revision, widely available.
By purplelightning
#68802
I've tried making and or modifying existing board designs but it's really above my skill level. I do have a 0.4c that I've used to learn with, but the form factor is too large for the application.

The 33pin Sumitomo is on a bunch of Honda and Yamaha motorcyles (Ten models as I count). So harnesses are also somewhat easy to comeby used. The 33pin plugs by themselves are not as common as some AMP connectors etc, but they can certainly be sourced.
But that said, I have thought about having a compact ECU that uses a less expensive connector and using a whip as you described it and it seems like an overall better way to go, it just would need to be waterproof. In that case, a Biltzbox might be the perfect one to use with a shunt.

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