Messed some more with these tables and I have to say thanks. They make a huge difference.
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Messed some more with these tables and I have to say thanks. They make a huge difference.
Yeah and a huge dose of that table.:hihi:Quote:
Originally Posted by 600+duramax
HT
i did mine once at 10% i like it!!!
Do you guys multiply ALL the tables or just the airflow table?
These tables look to have effect on calculated g/cyl or something similar.
Nope, just the one listed!!
They should not, it's just used to calculate engine torque (given the ECM can't measure that).Quote:
Originally Posted by Highlander
There are some tables there that say airflow spark??
It could calculate engine torque from rate of acceleration! But that is another topic,!
oh ok, those tables are in the whole torque calculation loop. To figure out the torque the ECM needs to take in to account the timing, obviously to calculate the torque the timing must be taken in to account.
Which TPS value do you log to fill in the B3001, B3002, B3003 Airflow lookup tables?
Call me crazy, but I think an easy way to get these tables in the ballpark really quick would be to log the torque estimate resulting from the coefficients (see post #1) during a WOT run that starts from very low RPM. Then you could compare the CALCULATED torque to a reasonable engine torque calculation from the dyno (corrected from wheel torque) and come up with a single rough correction factor at each RPM breakpoint.
Then, instead of multiplying the whole table by some unknown factor, you could have a series of RPM-specific corrections. Each one would be applied to its own RPM row and all of them would get applied in a single ECU flash.
Then just re-run the WOT pull and see how close you got it across the RPM band. Like he said earlier, you don't need to be precise, just "close enough". This should take a bunch of the guesswork out of the calibration process and speed things up by avoiding the mindless poking about of constantly trying different random correction factors across the board until it "feels right." You should be able to get close in one or two carefully measured corrections.