I'm wondering why there is not much talk about the rusefi uaefi on this forum. https://www.shop.rusefi.com/shop/p/u...affordable-efi
It has quite a bit of features for the price! (on board wideband, drive by wire, knock input, etc)
Seems like a good option for a miata build.
You have to take the time to wire it however...

What are your thoughts on this uaEFI?

 

There are a few rusefi based options i know of, beermoneymotorsports selling pnp's, along with epicefi being a rusefi variant working on pnps and adapter boards. From what ive heard the bmm ecus are somewhat tricky to tune, though ive never played with it. The epicefi adapter I tried was very good, being however much the speedyefi pnp i bought was + 60$ for an adapter board, getting lots of ms3 level features for that cost was cool. I never sorted some trigger issues with it, so im not entirely sure how it wouldve done in the long run. The firmware is promising and still getting support.

There are always options for people who want to save some money, but its important to note that majority of the money you save is going to get you something less tried, less tested, or with worse build quality/effort in the hardware and software. That doesnt ALWAYS mean more issues, but its naive to not expect hiccups.

 

I am running a UaEfi since they came out 2 years ago. I have a 1997 miata full Kraken setup with a GTX2860r gen2.
I was on a Speeduino UA4C for 3 years before. The UaEfi is WAYYY better than the Speeduino.
The close loop stuff works great. Close loop boost, fuel, idle ....
Integrated Wideband controller, 2 H bridge to run ETB and electronic wastegate
I am using a VW wastegate actuator and it is awesome. I can set the boost from 0 to all of it, no spring to mess with.

I just switch to the EpicEFI firmware on the UaEfi. It has even more feature than RusEfi on the same hardware.
I wired it with Aliexpress connector to make it plug and play ant not cut the car wires. https://www.aliexpress.com/item/1005...199a1802Mzt6A7

Bet keep in mind there is not much info online other than the github. You have to have a good understanding of all the car system to build a good starter tune.
It is time consuming to go trough every menu in TS to set everything up.
There is no good base tune for the UaEfi.