- Mon Mar 16, 2020 1:35 am
#41501
Just spent several days trying to find the best voltage correction.
This really is a big part of tuning.
I also set up an adjustable voltage circuit for my injectors to see if it made any useful change.
The answer is a BIG OH YES.
I got voltage correction to work with the car's 14 volts and tune very nice.
So that is all working as normal and is good. It works.
Now enters the voltage controller.
Real voltage is by far much much better than voltage correction.
I ran voltage from 9v to 16v into the injectors circuit.
I was able to change ARFs from 9 to 1 all the way to 23 to 1 with just real voltage change.
Yes this is with my NB O2 with my O2 controller and my test WB both.
I watched .1 volt, yes 1/10 volt make a change to the tune and I could see the O2 gauge and EGT change with that small voltage change.
I did see injector dead time go way down starting at 15v and up. 14.8 works good too.
I did see my idle tune smooth out and the AFR gauge had almost no swing at idle and AFR of 14.7.
Very stable. Because piddle and dead time went down so there is more time for good spray.
I did find the auto tune did lower the VE table value numbers a lot (tune leaner). I ended up needing to up the req fuel/CCs by 50% and the VE table by 50% and this helps make tuning better with higher numbers as I wrote about on another thread. It has to do with something like this:
Tuning 1% of a VE value of 5 is ten times more difficult that 1% tuning a VE value of 50.
Real voltage will do the same thing as changing the inj dead time but much more.
It really will lower dead time and piddle time not just try to cover it up in ms.
I want to set up a time laps vid of an inj test bed to see what is really happening.
That is a dream for another day.
All I can tell you is with real volts the tune is much better than with inj voltage correction.
Real volts makes the injector really work better.
Much less AFR swing at all points of tune.
More on this to come.
I am building a controller to make the ECU volts anything we want it to be, now I can see how good it works.
Black Knight
This really is a big part of tuning.
I also set up an adjustable voltage circuit for my injectors to see if it made any useful change.
The answer is a BIG OH YES.
I got voltage correction to work with the car's 14 volts and tune very nice.
So that is all working as normal and is good. It works.
Now enters the voltage controller.
Real voltage is by far much much better than voltage correction.
I ran voltage from 9v to 16v into the injectors circuit.
I was able to change ARFs from 9 to 1 all the way to 23 to 1 with just real voltage change.
Yes this is with my NB O2 with my O2 controller and my test WB both.
I watched .1 volt, yes 1/10 volt make a change to the tune and I could see the O2 gauge and EGT change with that small voltage change.
I did see injector dead time go way down starting at 15v and up. 14.8 works good too.
I did see my idle tune smooth out and the AFR gauge had almost no swing at idle and AFR of 14.7.
Very stable. Because piddle and dead time went down so there is more time for good spray.
I did find the auto tune did lower the VE table value numbers a lot (tune leaner). I ended up needing to up the req fuel/CCs by 50% and the VE table by 50% and this helps make tuning better with higher numbers as I wrote about on another thread. It has to do with something like this:
Tuning 1% of a VE value of 5 is ten times more difficult that 1% tuning a VE value of 50.
Real voltage will do the same thing as changing the inj dead time but much more.
It really will lower dead time and piddle time not just try to cover it up in ms.
I want to set up a time laps vid of an inj test bed to see what is really happening.
That is a dream for another day.
All I can tell you is with real volts the tune is much better than with inj voltage correction.
Real volts makes the injector really work better.
Much less AFR swing at all points of tune.
More on this to come.
I am building a controller to make the ECU volts anything we want it to be, now I can see how good it works.
Black Knight