Is every ECU based on Speeduino a good choice?

Unfortunately not

Speeduino is an open-source project – anyone can build something with it. The results vary a lot, and it’s not fair to lump them all together.

I’ve worked with quite a few of these ECUs:
❌ Units with poorly functioning idle control, unstable sensor readings – even from “reputable” brands
❌ Random maps that make the car hard to start, run poorly – or not at all
❌ Sloppy build quality, bad soldering, “creative” DIY work that breaks quickly… or feels risky to plug into a car at all

And the issue doesn’t stop at the board itself.

🧩 Most ECUs you can buy are just bare Speeduino boards – you’re left to figure out the wiring, tuning, alternator control... and hope it all works. That’s great if you're into tinkering. But if you just want to enjoy driving your car – know that all this takes time.

That’s why my ECUs are something more:
✅ True plug & play for Mazda MX-5 mk1 NA / mk2 mk2.5 NB – plug it in, start the engine, drive off. In 15 minutes. Really.
✅ Quality components – every unit is tested under load
✅ Full documentation and real support – not just “you’re on your own”
✅ mk2 NB and mk2.5 NBFL versions with built-in alternator control – no alternator replacement or external modules needed
✅ Includes a ready-to-run base map – saves you time… and fuel

I build what I’d want to buy as a customer.

I’d like to dispel the myth that Speeduino is only for hobbyists with too much free time or crazy DIY guys. That it’s always trouble. It doesn’t have to be that way.

Plenty of cars run my ECUs – daily.