VE table error, what is considered "good"

[radkon]

So I've been playing with my VE table for awhile and figured I'd get some opinions. I created a little spreadsheet in Excel for statistical analysis and can plug in any error rate (or margin of error) and see what percentage of the table is "good". At 4% error (14.09~15.26) the majority (66+%) of my VE table falls in this range. At 3% its about 46%.

I know when looking at fuel trims people use 0 to -4 as "good"
So the question is what % error do you use?

[redhardsupra]

care to post the tool?

[radkon]

care to post the tool?

I will when its done, right now I'm doing some of the calculations by hand I'm limited by Excel 2000 here at work. I'll play with over the next few days and share it I promise!

EDIT: I got bored and frustrated at lunch and I think I got it solved! Take a look. Plug in your desired Stoich, desired error rate and paste in your VE table and it will show you how close you are.

[gottogo]

So the question is what % error do you use?

I shoot for mostly 1's. I found if I do back to back runs, adjusting my VE after the first run, then doing it again immediately, I get pretty close to all 1's.

[radkon]

I shoot for mostly 1's. I found if I do back to back runs, adjusting my VE after the first run, then doing it again immediately, I get pretty close to all 1's.

1% error or -1 in LTFT?

[Gh0st]

Nice work. The only thing that really throws my VE off is when I hand smooth it. My VE error % is always sub 5% though. If you want to be anal, be anal.

[radkon]

Nice work. The only thing that really throws my VE off is when I hand smooth it. My VE error % is always sub 5% though. If you want to be anal, be anal.

The discussion was started here whether it was better to have a "perfect" VE table or a smooth VE table. Greg (Eficalibrator) emphasized the advantages of a smooth table over a "perfect" table. I decided to create this to help find a happy median.

[WS6FirebirdTA00]

When I get my VE table right, it is smooth anyway. You have to throw out the bad data. When I get close, I do not use histograms to make changes, I look for steady state and pick and choose points to change.

[radkon]

I've added a few buttons to make populating the table easier and changing the Stoich and error rate "dummy proof"