I know there are several threads about specific injectors and their specs and general advice around KRKTE, TVUB, FKKVS. However, I'd like to start a thread that was for logging and fine tuning injectors that you might not have the specs for and could be used for fine tuning injector that don't seem to behave correct when their specs are used.

I'd like to discuss what to log, how to look at the data, and how to interpret the data then apply changes needed gathered for data.

Start with a estimated KRKTE - > KRKTE Cheat - Dial in those injectors faster!

Turn off multiplicative and additive adaptive correction -> set NOLRA 0 and 1 bits = 1

the log rl_w, ti, rpm, frm_w (or fr_w?), mshfm_w, uhfm_w

This is how I look at data:
02 reg vs ti


02 reg vs rpm


then view avg by FKKVS nodes



There's where my knowledge/experience ends. So how else should we log, then look at data? And then how should we interpret data (start with example above) to extract changes we need to make?

Thanks,
Rey

I think it is more likely you are looking at MAF non-linearity than injector non-linearity.

Injector limitations simply do not look like that... they're generally simple latency issues, which would be much easier to spot in your scatter plots.

Do a similar heat plot of MAF/RPM vs fueling error...

one more

ti vs maf mass flow


This one looks like it might shed some light.

How are you coming to the conclusion that it's a MAF calibration issue vs an injector calibration issue?

I'd like to discuss HOW to read the data to come to said conclusions.

Thanks,
Rey

O2 Reg vs maf mass flow and rpm



O2 Reg vs rl and rpm

What software are you using to plot the heat map?

Ok, I did wonder how you were getting all the data in Excel but i see you are rounding which is fine i guess.  I might try and do a 3d scatter with Matlab.

Rick

What injectors are you using? Are you on a returnless system?

I believe the low PW non-linearity should be concidered if using big enough injectors, IIRC I have compensated over 10% at some of the lowest pulsewidths.