Help with building your Speeduino, installing it, getting it to run etc.
#68861
RobertZalewski wrote: Tue Jul 09, 2024 12:19 pm I'm talking about the difference that at the end of the straight on the same track, the revolutions are not 7100, but 6900. (in top gear)
I will check the lambda in the logs, but I observe it live while driving and it is ok.
How about oil temperature ?
How abour battery voltage ?
Ignition coils getting hot ?
Heatgrade sparkplugs ?
#68866
I'm wondering and I think it's enough to change the setting from one to two injectors. And apart from changing the PW time (because they have lower efficiency), do not change anything else in the settings. But the system works without the camshaft sensor, it is in "PAIRED" mode. Will there be a shortage of fuel?

I am planning to do this because I am at the final stage of building such an engine head and intake manifold.

One injector: 1 x 430cc
Two injectors: 2 x 250cc
#68867
LAV1000 wrote: Thu Jul 11, 2024 8:56 pm
RobertZalewski wrote: Tue Jul 09, 2024 12:19 pm I'm talking about the difference that at the end of the straight on the same track, the revolutions are not 7100, but 6900. (in top gear)
I will check the lambda in the logs, but I observe it live while driving and it is ok.
How about oil temperature ?
How abour battery voltage ?
Ignition coils getting hot ?
Heatgrade sparkplugs ?
Thanks for the suggestions, I'll check it out next time I get a chance.
spark plugs are probably ok, many drivers use them. I will check the rest of the ignition and spark plugs out of curiosity.
#68888
PSIG wrote: Thu Jul 11, 2024 4:41 pm Why is that a problem?
I'm wondering how to properly change the basic injection settings...
1 injector is 430cc
2 injectors each have 250cc

I don't have a camshaft sensor and I probably won't have one. Therefore it works in PAIR mode.
I just want to understand the principle.

-----

Is it enough to change the PW time for injection to 250cc and the "number of injectors" field to 2 and that's it?
The photo shows the settings for one 430cc injector.
Attachments
1 inj 430cc.jpg
1 inj 430cc.jpg (5.65 MiB) Viewed 705 times
#68890
I would look at staged injection for concepts. The total CCs is the total of all 3 injectors for Req_fuel calculation. In-fact, staged is probably a more effective strategy anyway, running on the two smaller injectors until demand activates the 3rd. The physical layout of each injector versus cylinders would be important for specific concepts of n-squirts and timing, so please provide that info.

The confusion: The point is not what Speeduino should do, but what it does do, so users can work with it reliably. A good chart should be created for how Speeduino really works for squirts and sparks, as there is a lot of confusion when a 2-cylinder 'even-fire' setting functions as an odd-fire twin (180). :shock: The parallel twin is the only true even-firing option (360). All others are odd, and so expected function is not as would be assumed.

IMO: While it doing as we expect is preferable; the functional effects of the code become much more important. IMO a current and accurate chart would go a long way to side-step frustrated users thinking and spreading that Speeduino is less-than, when they are simply confused what it actually does and when.
#68897
We didn't understand each other, my friend ;)

The case looks like this:
1. One injector is on the engine that has an engine head that has one intake channel for two cylinders.

2. The second engine will have engine heads with separate intake ducts for each cylinder.

And I won't use three injectors, but two injectors ;)
I don't need staged for this.

Regards
#68898
RobertZalewski wrote: Tue Jan 30, 2024 11:11 am This "360*" graphic clearly shows the operation of the timing belt.
Ignition is on both cylinders because there is wasted spark. (also the original stock ignition works this way).
Maybe I need to connect INJ1 and INJ2 together to my injector...?
I would prefer to solve it in software :)
Maybe I need to change the code under R2 TWIN PARELLEL...

I'll try to test Josh's suggested settings this weekend
Here I clearly described how my engine works.
Attachments
360-180-270-degree-firing-order-explained.gif
360-180-270-degree-firing-order-explained.gif (243.07 KiB) Viewed 641 times
360-180-270-degree-firing-order.png
360-180-270-degree-firing-order.png (204.88 KiB) Viewed 641 times
126_2_squirts.jpg
126_2_squirts.jpg (167.61 KiB) Viewed 641 times
#68923
Yes.
RobertZalewski wrote: Tue Jul 16, 2024 6:05 amHere I clearly described how my engine works.
Yes, and is exactly how I responded. We have used those graphics here before, and they never get old. 8-)

Thank you for clarifying and correcting the three injectors question. All the principles are the same, however. For a single fuel source (one injector) on two cylinders, you must have one injection per-cylinder for even fuel distribution. That would be 2 squirts per-cycle, minimum.

For other users reading this - anything other than a parallel twin is odd-fire, and single-point fueling can have issues as the inductions are not symmetrical. This can lead to uneven fueling, in-spite of 2-squirts, due to charge stealing.
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