Setting proper stoich for scaled tune...

[edge04]

I am running the COS 2.5 tune w/ ID1000 injectors therefore I have my stoich set to 29 which would equate to 14.5. Doesn't look like you can run fractional numbers. I run E10 which stoich looks to be closer to 14.1. so am I better off changing the stoich value to 28? I am tuning using lambda error and have my NGK WB set up using 10.42 and adder at .62. thanks

[realcanuk]

You can put any number you want... example. 28.20.. If you cant put decimals right click and check you "precision" setting.

[edge04]

hmmm I've tried but it doesn't allow me and the precision setting is set correctly. Will mess with it tonight more.

[edge04]

Ok, that worked. So would this table be set up correctly for E10? If I understand this table correctly the percent number is the amount of alcohol. Therefore 10% is between the 6.25 and 12.5 and the scaled rate comes out to 28.25 or 14.1.Or do I need to just change the 0.00 and 28.2?


Stoich AFR.png

[edge04]

I am think I would just set my stoich value in the 0.00% column and ignore the rest as my car doesn't have any type of fuel sensor? And if so, since I only run E10 I should use 14:1 (or 28.2 doubled for injector scaling). thanks

[realcanuk]

I use 28.80 which is a bit of a compromised for the E10. I don't think the rest of that table is used but I just doubled it all.

[edge04]

so I changed it to 28.2. I would expect it to run leaner from 29. I scanned low map <80 and under 4k rpm in OL only. I found that under certain load my lambda reading in the VCM pegged at 1.08 and the AFX gauge would peg at 16. My WB is set to V/10.42+.62. Should I change that since I not reading 1.10 at 16? Or just tune for lambda 1 and not worry about the extreme ranges?

I used the histogram readings to adjust my VE table. I copied and pasted by % and my readings got leaner? Maybe my histogram is set up wrong?
100*([AUX.20121]-[USER.9004])/[USER.9004]

Here is my tune and scan. Scan 2 is after adjusting the using the lambda error histogram

[ATTACH]46280[/ATTACH
ATTACH]46278[/ATTACH]
LAMBDA 1.hpl

[edge04]

I'm guessing that my lambda error histogram should be using the same scaled AFR stoich, in my case 28.2?? [SENS.121] >28.2 If so that may have been a big part of my problem

[edge04]

well that seemed to correct my issues. I got my WB set properly, in free air I read 16 and 1.10 in the scanner. My error and histograms are working and now doing some tuning. Been working on <4k RPM and under 70kpa so I disable all PE settings and fuel adders. No MAF.

When my AFX gauge first starts up it displays 2.0 before the count down. What does that mean? I've heard of 3 readings but I only get that.

LAMBDA 2.hpl