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-   -   Arduino as ECU? (https://www.miataturbo.net/ecus-tuning-54/arduino-ecu-50695/)

PAdutch 10-27-2017 10:14 AM


Originally Posted by noisymime (Post 1446037)
Just a quick update. Everything seems to have gone fairly well with the initial beta run. I believe most people are now up and running (at least out of those that have tested it) :skid:

I've decided to do a second beta run though, just to improve a few things here and there. The differences are:
  • Fuel pump circuit has been changed and now uses a beefed up smart FET. The circuit in the Beta 1 units works fine, but the polyfuse I had added to try and prevent damage if someone forgets to remove the ST_SIG fuse hasn't worked as intended. This change should mean that the circuit remains protected in that instance
  • A dedicated fan control circuit has been added
  • Cuttable traces added to allow conversion to sequential fuel for anyone who wants to run the wires
These have been sent off this week for production, meaning they're probably about 3 weeks away. It'll be another run of 10, but assuming no issues I will begin a much larger production run shortly after that.
If anyone is interested in one of these, shoot me a PM and I'll reserve one for you. Price will be $180USD + postage
(I've decided the final retail price will be $200USD, so the beta runs are slightly cheaper than this)

I am amazed at the progress of this. I am not a computer guy so this stuff really boggles my mind. This is some great work noisymime.

Have any of the beta unit cars been fully tuned/in use/etc?

noisymime 10-27-2017 04:05 PM


Originally Posted by PAdutch (Post 1448129)
I am amazed at the progress of this. I am not a computer guy so this stuff really boggles my mind. This is some great work noisymime.

Have any of the beta unit cars been fully tuned/in use/etc?

Not sure if any have gone to the dyno for tuning, but I know at least 2 of them are being used on daily drivers. I did a lot of work over the last 2 months to improve the starts etc, but it's quite civilised now for daily use :)

noisymime 10-27-2017 04:59 PM


Originally Posted by Vengeful Frog (Post 1448072)
Cool stuff, nice to see this isn't dead.
Have you had any issues with the speed limit of 16Mhz?
Thought of going ARM?

Not really, just a matter or writing things carefully.

That said, the code is cross compilable for the Kinetis (K65) MCUs (Think Teensy 3.5) and support is being added for stm32 currently (Though these are a bit more limited). As it stands though, there aren't any extra features for those as there's nothing the Mega can't run.

Vengeful Frog 11-01-2017 10:33 PM

I think that's damn impressive then for what you have it doing, you're a far better coder than I am. Well done.

noisymime 01-02-2018 05:46 PM

So after a couple of delays (Thanks Customs!) the beta 2 units are finally ready to go. I've sent an email out to those who were on the beta list, so these should be all going out shortly.

Simply because the question of ARM procs was asked above, this might be of interest:

Drezi 01-02-2018 06:11 PM


Originally Posted by noisymime (Post 1459650)
So after a couple of delays (Thanks Customs!) the beta 2 units are finally ready to go. I've sent an email out to those who were on the beta list, so these should be all going out shortly.

Was it a batch of 10 again? Also how many have been claimed out of how many produced? I may be interested in another unit some time in the near future. I also have had a bunch of people who are also interested. You should definitely update the speeduino website with a page to post progress, sign up for mailing, post info, etc.

noisymime 01-08-2018 10:56 PM


Originally Posted by Drezi (Post 1459655)
Was it a batch of 10 again? Also how many have been claimed out of how many produced? I may be interested in another unit some time in the near future. I also have had a bunch of people who are also interested. You should definitely update the speeduino website with a page to post progress, sign up for mailing, post info, etc.

Yes, just another small batch to verify the changes (Which all seem to be fine in my own personal testing).
I'm preparing the design files for a larger run now and will pull the trigger on this as soon as I get some feedback on this batch.

Send me through a PM as I've got 1-2 of these spare if you're interested.

huesmann 01-10-2018 03:44 PM

Question: do you need a wideband to get one of these running?

noisymime 01-10-2018 04:12 PM


Originally Posted by huesmann (Post 1461131)
Question: do you need a wideband to get one of these running?

No, but it does help immensely with tuning. Given the prices of them these days (You can get a controller and sensor for $100 USD) I would strongly recommend it, but there certainly not mandatory.

UrbanSoot 01-10-2018 04:42 PM

Just saw this for the first time and this is awesome! Will be following the project and waiting for v2 :party:

ghia nut 01-21-2018 08:23 PM

So initially installed speeduino, wife laid off and needed her Miata to get through the layoff and I put the stock ecu back in.
just reinstalled and after working with the unit a bit it idles ok.
Original idle was Stoopid pig ass rich, like so rich i may have to clean the plugs.
So far I'm really pleased with it.
My friend that's a tuner, who would tell Jesus the correct way to make wine, is going to mess with it Tuesday so he may or may not complain about it.

So far from my perspective two thumbs up!!!

lsdlsd88 01-22-2018 06:25 AM

anyone would share a "roughly fine" MSQ for speeduino with 1.6 miata?

noisymime 01-23-2018 12:10 AM


Originally Posted by lsdlsd88 (Post 1462902)
anyone would share a "roughly fine" MSQ for speeduino with 1.6 miata?

There's a base tune for this setup included in the firmware bundle ('Base tunes' directory)

lsdlsd88 01-23-2018 12:47 PM


Originally Posted by ghia nut (Post 1462843)
Original idle was Stoopid pig ass rich, like so rich i may have to clean the plugs.

so is this behaviour to be expected on a base map and mostly stock engine?

Because the meaning of base map can be very different.

ghia nut 01-27-2018 02:37 PM

It's a bit rough
 

Originally Posted by lsdlsd88 (Post 1463172)
so is this behaviour to be expected on a base map and mostly stock engine?

Because the meaning of base map can be very different.

Having some interesting issues.
We tuned all day yesterday and got it running fantastic.
Adjusted spark tables. Had knock ears on. Very pleased with it. Pulled great. Responded well. Went home and cold or hot won't start for shit unless you peg the throttle bad.

The start up is an absolute nightmare on this currently and the ability to tune this is kinda wacky as the normal tables you would expect with a Ms are not the same.
My tuner tried to plug in correct values for the fuel injectors and it went South so I reverted it. I've gotten it to idle back so it's been touch and go.
Will report report back.
currently using Gm iat
Auto trans tb with v tps
spartan wb correctly setup
All wired per manual.

lsdlsd88 01-27-2018 03:08 PM

plugged in mine today also!

I think I will fiddle a little bit with the idle screw because right now it starts quickly if i press the throttle just a bit, but does not like starting with 0% tps.

about the mapping itself I still have to wire up the wideband, iat, and run the vacuum hose NOT through the passenger window so it will take me a while to get really ready ;)

ghia nut 01-27-2018 06:08 PM

Finally updated the firmware so we know how to do that now.

Think we may start back from scratch.
Im just happy we have it running again.

The biggest issue we have is start up and cranking settings as it is super duper pig rich.
WUE
Acceleration enrichment
Also any help info with idle control either the idle switch or idle air control valve.
We can take care of the rest of the tune.

noisymime 01-27-2018 07:23 PM

If you're able to post your current tune and a matching log of it starting, running, Accel enrich etc, that will give me an idea of what's going on.

Generally with the idle, I've found on the cars i've worked on that I haven't need to modify the screw too much, if at all. The IACV in these things is fairly easy to tune and I'd recommend going with open loop for it unless you really have a reason not to. You'll save yourself a heap of time. At 0% duty, the valve is partially open as a fail safe mechanism, and is not fully closed until about 35% DC. I've found that have 0% duty when cold, raising up to this 35-40% DC mark when warm works really well and should give an idle that drops from ~1100rpm when cold to about 800rpm once warmed up.

ghia nut 01-29-2018 12:36 PM

I think we made some base assumptions that bit us in the fanny on this one.
I just compared the original base tune to the new base tune from the Dec 17 firmware update.
There were some changes, small but hoping significant.
Also I'm now assuming this is to be used or started with the stock Miata afm in place right? Given that the new air intake vs stock is more efficient this would cause some headaches (running under load isn't horrible to tune due to ve analyze live, but anything down low may be problematic)
We started with a cold air intake and gm iat so this may have added to the learning curve on our end.

Going to write the new base tune with correct sensor scales and see what happens tonight then go from there.

noisymime 01-29-2018 04:42 PM


Originally Posted by ghia nut (Post 1464307)
Also I'm now assuming this is to be used or started with the stock Miata afm in place right? Given that the new air intake vs stock is more efficient this would cause some headaches (running under load isn't horrible to tune due to ve analyze live, but anything down low may be problematic)

Yes, that base tune was done on an essentially completely stock NA6. AFM remained in place and the original IAT was used, the only changes were the VTPS and the wideband. If you've changed your inlet then that will definitely account for some of the differences.


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