EcuTek Unable to Increase Load Limits

[Td-d]

Originally Posted by brn12345

Td-d you mentioned earlier "Engine Load Limit C" as a table. I can only see Engine Load Limit A & B in the software I use. Can you confirm if there are additional Engine Load Limits other than A & B?

Yup - two tables, and one float value (labeled 'A') there is also an IAT load compensation table, and and atmospheric pressure comp table.

[Skorov]

MAF readings were the first thing I checked too. It's quite clear when you look at the graphs that the AF values raise naturally, where the load is hard limited. Can't be the MAF.

[wparsons]

^^ The MAF doesn't show AFR, the O2 sensor does. You could unplug your MAF and still have AFR readings. Load on the other hand is a direct calculation based on the MAF reading.

[Skorov]

Originally Posted by wparsons

^^ The MAF doesn't show AFR, the O2 sensor does. You could unplug your MAF and still have AFR readings. Load on the other hand is a direct calculation based on the MAF reading.

Sorry. That's what I meant. I originally thought that the load cap was a result of a MAF reading flaw.

I'll be doing some tests on the weekend with the PI/DI ratio table.

[Kodename47]

Originally Posted by Skorov

Sorry. That's what I meant. I originally thought that the load cap was a result of a MAF reading flaw.

I'll be doing some tests on the weekend with the PI/DI ratio table.

Any update mate?

Originally Posted by moto-mike

DI/PI ratio in custom maps is a fractional 0-1, DI/PI ratio in the factory tables is 0-100 percent. The factory tables have cutoffs in that you can't always command lower numbers. You will want to make a fully custom map for the ratio if you want precise control.

Going back over this, do you have any idea what the cut-offs are? I get the impression that in higher load, anything under 20.3% is ignored but it would be nice if someone could elaborate over the stock use to save us wasting lots of fuel testing.

[Skorov]

Originally Posted by Kodename47

Any update mate?

I did a very basic test on the weekend. I simply set the whole table to 50 and did a few road runs. The injectors seemed to respond well.

Any further test I would like to do only on the dyno to eliminate any road variables.

Hopefully my RaceROM upgrade comes through today so that I don't have to cancel my booking for dyno time tonight.

[Kodename47]

Well I went out today and had a play WRT the injector ratio and reduced all the lower load areas to varying different ratios and went for a drive. I did not see any PI use at ratios below 19.5%-20.3% so that looks like that's the trigger point for enabling PI. Now I have no idea whether ratios above that are actually as requested or there are certain split limits.


The OEM map has values of 20.3, 35.2, 38.3, 43, 45.3 and 50 so I assume that anything over 20.3% is possible. I guess the only way to test is to do a few pulls and then try a new table. Anyone want to take this on? Realistically you wont want much more than the 20% anyway, although apparently on NA it helps to have a little more PI at the top end.



I need to confirm whether 19.5% works, or find the value, if interpolated, of the limit.

[Kodename47]

Thought I'd update this thread. I tried a new bunch of PI ratio settings now with a more complete map of mine. Here's the table, cold, warm and hot are all the same for consistency.



The idea was that I could see what % exactly the Pi starts working by splitting ratios in 500rpm increments. See my post above for my previous findings, although I had since discovered I could get 18% to work. However the result did surprise me a little:



It seems that the ratio matched the table perfectly, suggesting that the previous minimum ratio that I thought I had discovered was incorrect. I'm not sure if this is the result of ECUtek updates or not. I noticed a couple of new "Idle" maps appeared yesterday after an update. Just thought I'd share.