uaEFI Ultra Affordable EFI

[AndreyB]

$100 fully assembled 6x6 standalone with DBW and WBO.

https://github.com/rusefi/uaefi

uaefi-a-top.png

[AndreyB]

Now waiting for wideband cables and pigtails to be manufactured.

[ykill]

Good job! Pretty interesting at this price!

[jevgienij]

Optional EGR or EGT?

[AndreyB]

Optional EGR or EGT?

EGT, thank you for pointing out the typo!

[AndreyB]

it has passed testing https://github.com/rusefi/uaefi/issues/25 and it's now up for sale at https://www.shop.rusefi.com/shop/universal-control-unit

[joaodh]

I'm currently following various topics on the forum, and I'm contemplating converting my classic car to run on an ignition-controlled ECU.
Initially, I'll stick with the stock injection system (K-Jet ).

My goal is to maintain the original look of the engine bay, so I plan to adapt the distributor with a trigger wheel.
Is this board suitable for use? I'm not a fan of the connector positions, for me will be better to have all pins on the same side. I might explore changing that.

Thanks for this fantastic project.

[AndreyB]

uaEFI is doing good! There is already one unofficial adapter see FB group. We've just merged preview of the official hellen-one module for uaEFI adapters see https://github.com/andreika-git/hellen-one/tree/master/modules/uaefi/

[Chybber]

Hello I've made a simple box/case and lid with snap fit. It's real simple but should work ok
The board is fastend in with 4 m3 screws directly in the plastic And the lid is as mentioned snap fit, good tight fit so should not come loose.

I've only test printed in petg so I don't know if pla etc would work ( you have to test)
My print settings were
0.16 layer height
3 walls
6 top/bottom layers

[AndreyB]

Now working on first official adapter board so rev B had changes specifically for ease of adapter application

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[AndreyB]

Kim has posted another enclosure on FB - https://www.thingiverse.com/thing:6498664

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[Mappie]

Hi,

2 question 's :

Q1, what is the purpose of the Optional Can 2? or better, when would i need it? any example?

Q2, i recieved my JDY-33 bluetooth, can i just solder it in? or does it need programming first?

thank you.

[AndreyB]

Q1: I do not know. What's the purpose of CAN 1 or even what's the purpose of rusEFI?

Q2: just updated https://github.com/rusefi/rusefi/wiki/Bluetooth with references to recently updated tickets about all that

[AndreyB]

Random suggestion while unfortunatelly things are not perfect

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[gurov]

more mounting suggestions:

carrier board in a stock ECU case

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able to close the cover:

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pins into UAEFI molex connectors at almost straight angles:

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for molex spacing, 3 pin connectors with middle pin removed:

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[Atlantis2013]

hello,

what is the copper weight for inner and outer ? both 1oz ?

best regards

[AndreyB]

what is the copper weight for inner and outer ? both 1oz ?

probably, whatever is the default.

[Atlantis2013]

what is the copper weight for inner and outer ? both 1oz ?

probably, whatever is the default.

default is 1oz for outter and 0.5 for inner

[Larspars]

Hi

What componets do I need to populate CAN2 option? Cant find it in any BOM.

[ludowrx974]

I'm really sorry for this question, I'm a beginner. I was able to see the different documents on the UAEFI. Concerning the VR conditioner, is it able to work well with the civic (or dizzy) igniter?

[AndreyB]

I'm really sorry for this question, I'm a beginner. I was able to see the different documents on the UAEFI. Concerning the VR conditioner, is it able to work well with the civic (or dizzy) igniter?

yes search gives https://rusefi.com/forum/viewtopic.php?p=49552#p49552

[AndreyB]

A nice enclosure https://github.com/Light-r4y/uaEFI_case

WhatsApp Image 2025-03-05 at 13.05.33_76818eea.jpg

[mpgmike]

Looks like it works with the standard UAEFI (not the 121). Are they for sale for those of us who still don't have a 3-D printer? If so, how much?

[mpgmike]

AndreyB, the current UAEFI uses a TI SN74LVC4245APWR Logic Translator for U103. It is capable of sourcing and sinking 24 mA on the outputs. Spent some time and found a pin-compatible TI SN74LXCH8T245PWR capable of source/sink at 50 mA. I bring this up because I fried U103 twice trying to drive LS coils. Mouser single unit price for what you're using is $1.04, while the suggested replacement is slightly higher at $1.73. Here is a link to the data sheet: https://www.ti.com/lit/ds/symlink/sn74lxch8t245.pdf?ts=1743163518629&ref_url=https%253A%252F%252Fwww.mouser.com%252F

[mpgmike]

Out of curiosity I bench tested an LS coil logic circuit. I connected both grounds, but not battery voltage. Applying 5 volts to the signal drew less than 2 mA. I have no idea why LS coils burned up U103 two times.

[AndreyB]

Great news!

https://github.com/rusefi/uaefi/issues/78 and noted on https://github.com/andreika-git/hellen-one/issues/378#issuecomment-2764559502