I cannot explain any of this. I love my bits and bytes, but this is not bits and not bytes. It's a very pleasant surprise that it works
Re: 99 miata 1.8 turbo PnP setup #53
Posted: Sun Nov 03, 2019 1:22 am
by scramblr
First drive with RusEFI!!!
Drives really good!
Boosting about 8psi, and I definitely found the limit of my stock injectors.
Can't get much over 5000 rpm with that much boost before I max them out.
The 460cc's are on the bench because one of them doesn't flow right.
This is just the beginning!
Re: 99 miata 1.8 turbo PnP setup #53
Posted: Sun Nov 03, 2019 1:54 pm
by kb1gtt
I love the sound of a BOV in the morning.
Re: 99 miata 1.8 turbo PnP setup #53
Posted: Sun Nov 03, 2019 2:54 pm
by Abricos
Congratulations
Re: 99 miata 1.8 turbo PnP setup #53
Posted: Thu Nov 07, 2019 6:44 pm
by scramblr
I sent my 460cc injectors in to injector-rehab for cleaning and flow testing.
Hopefully they'll be back soon, and I can see what sort of power this thing is really capable of
Re: 99 miata 1.8 turbo PnP setup #53
Posted: Sun Jan 26, 2020 12:20 am
by scramblr
460cc injectors in, 7psi so far!
I found that my 3lb wastgate spring is too soft, so the exhaust pressure can force it open without the aid boost. Once I install a stiffer spring I'll crank it up some more.
Re: 99 miata 1.8 turbo PnP setup #53
Posted: Sat Feb 29, 2020 1:58 am
by scramblr
Here is my latest tune with 550CC injectors.
Far from finished, but seems to be pretty dialed in for fuel flow rate and injector dead time.
The VE table is pretty close since most cells of the target AFR table now match my actual AFR.
My current tune as well as a recent data log are attached here.
For some reason, the data log was written as a .mlg file, and wasn't attachable.
I manually changed the extension to .mls, so it may possibly not be viewable.
Still no electronic boost control, but I junkyard picked a boost solenoid off a volvo, and have started exploring the tune a little.
Re: 99 miata 1.8 turbo PnP setup #53
Posted: Wed Mar 18, 2020 1:45 pm
by AndreyB
Thank you for the happy user content, helps to know that some of these are moving on their own power
Hook up a Boost valve (Cheap MAC Valve), and you can control boost from TS as well..
Then you can lower boost in critical rpms/areas and increase in others
Question about Open loop boost control.
The table is RPM vs MAP.
Seems like it should be RPM vs TPS like the closed loop boost table.
Is this correct?
If so, how is it supposed to be tuned?
What are the Z axis values? Solenoid DC?
Re: 99 miata 1.8 turbo PnP setup #53
Posted: Tue Mar 24, 2020 4:09 am
by AndreyB
At the moment the answer is: unknown.
We have this code but we have no officially recognized reports of usage.
Not sure why your table and axis dont have values in it..
As discussed a few times now, this is what happens when you update firmware with an incompatible change to the config layout. There was nothing there before, so it just reads out whatever garbage used to be there.
Not sure why your table and axis dont have values in it..
As discussed a few times now, this is what happens when you update firmware with an incompatible change to the config layout. There was nothing there before, so it just reads out whatever garbage used to be there.
I am not following you?
Default values are set in engine_configuration, and should be there if it's updated.
In that case, the .ini must have been updated without updating firmware.
The only thing I can think of are if you select send tunerstudio-configuration at first connect after update,
this will happen.
Default values are set in engine_configuration, and should be there if it's updated.
In that case, the .ini must have been updated without updating firmware.
The only thing I can think of are if you select send tunerstudio-configuration at first connect after update,
this will happen.
I am afraid that this is not how things work. There is a chance that this is bad advice.
Default settings in the firmware are only applied for brand new ECUs. If you have some settings and some old firmware and then update the firmware, your old settings are used and defaults related to new features are not automatically applied. I hope that we would not be debating or discussing how to change this in this thread related to the specific application.
In this case defaults have to be applied manually. In order for @scramblr to apply those defaults someone would have to post a screenshot of default settings for this feature.
Re: 99 miata 1.8 turbo PnP setup #53
Posted: Sun Apr 19, 2020 12:36 am
by scramblr
Got the boost solenoid installed.
One wire is getting 12V, the other wire is routed to pin w37 for injector driver PE5.
However, the solenoid starts cycling at the calibrated frequency (30hz) even when the boost control table is set to all zeros.
It will continue to cycle even if I disable boost control all together as long as the pin is still assigned.
The only way to stop the solenoid is to change the output assignment to none.
Any ideas what is going on?
Is using an injector driver the right approach?
This is what I did for my IAC valve, with good results.
Re: 99 miata 1.8 turbo PnP setup #53
Posted: Sun Apr 19, 2020 1:24 am
by AndreyB
Remember that you are the first user of boost and the contributor never showed any proof of this feature working.
Let's first see if software or hardware issue?
Do you have fly-back diode? Is fly-back diode needed here I am not sure to be honest.
Please use "boost control" debug mode to see commanded duty cycle.
Debug fields is an advanced troubleshooting feature allowing one to monitor internal state of some rusEfi subsystems.
In TunerStudio, select "Base Engine Settings -> Debug Mode" and use gauges from "Debug" category.
I recorded a log with boost control debug, but unfortunately I can't attach it here. Can't attach .mgl file type apparently.
What variable would be the boost control duty cycle?
All the debug variables show a value of 0.
debugF1 is Boost Open Loop Duty
debugF2 is Boost Closed Loop Duty
in your logs both seem to be showing zero. I cannot explain why is your HW producing 30 Hz what is the duty cycle?
Re: 99 miata 1.8 turbo PnP setup #53
Posted: Tue Apr 21, 2020 2:25 am
by scramblr
I would have to hook up a scope to see the duty cycle.
Probably worth doing.
Is there a different pin I can use, or does it need an injector driver?
I'm all out of injector drivers, so that's why I ask.
Maybe there's a short somewhere causing the misbehavior?