Quote:
Originally Posted by Kodename47
You have decent data so lower the dV/dt to something like 0.3/0.25. Looking over the mean/mode data I would say that the 1st rescale was pretty good. I would revert to that, smooth it out (I've added the data below) and then use the Engine Load Comps to get the last bit dialed in as you'll get a finer tune as the last bit of variance is probably due to changing manifold pressures.
It's worth using the log view tab to give you a good overview of LTFT and STFT
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Thanks for that, will flash your scale and do some more driving to gather additional data. Hopefully the weather doesn't change too much, but night is the only time I'll be able to avoid the traffic and it's getting cold (~10degC ambient) which isn't ideal. Need a temperature controlled dyno cell!
The Engine load table hasn't been altered from stock, doing a test run with the current data in the load rescale gives MP calc changes in the final 1.01 column only. Is that what I should expect once I have data from your revised scale?
Quote:
Originally Posted by freerunner
If you're using cruise control, make sure the engine runs at different rpms for some time to gather enough data for different maf voltages. Use the higher rpms as well. You definately want to get data for 3.20V in closed-loop(!) and that's really difficult. 3.2v is used in open-loop as well, this is where load limits come into play. Have a look at @ Wayno 's thread, to understand how it's done.
Try to drive dynamically with different loads while avoiding going open-loop. |
Avoiding the open loop scenario isn't so easy! I looked at Wayno's thread, but didn't quite see how specifically to chase 3.2V in closed loop?
Also didn't think about Celsius vs Fahrenheit. And you were correct about the scale, it isn't the OEM one. I probably should have started there but it was supplied by someone familiar with the same turbo kit I have installed. Expected it to be close enough straight up but wasn't the case.