when tuning VE table do you guys disable P.E. or not?

[bigfatls6]

I have read and seen it done both ways. How do yo guys do it? Do you guys just disable it in the lower rpm?

[oakley6575]

For me, it depends on what I'm trying to tune. If know i'm not going to go WOT then I disable pe. If I'm doing more than part throttle tuning, I leave pe enabled.

[bigfatls6]

For me, it depends on what I'm trying to tune. If know i'm not going to go WOT then I disable pe. If I'm doing more than part throttle tuning, I leave pe enabled.

right now im just trying to tune part throttle. I have tuned a few head and cam motors and always just left it on and kept t.p. low enough to stay out of p.e. for some reason this one is kicking my ass.

[oakley6575]

Yea for part throttle, I would disable pe knowing you won't be in any high load situations. That is just my opinion though

[Higgs Boson]

I would not disable pe, I would filter it out in your histogram.

[oakley6575]

That is a good idea. Never thought of doing it.

[bigfatls6]

How do I filter it out?

[Higgs Boson]

filter it using commanded afr or commanded lambda. only take readings when cAFR or cLambda is at stoich. If it is not commanding stoich at operating temp, then it must be commanding PE, right? assuming you have the modifiers like COT, Dod, DFCO, etc etc disabled while tuning.

you can have one histogram for stoich tuning and another one for PE tuning. heck, you have 10 or whatever, use them all. you can tune part throttle, wot, idle, timing, etc etc at the same time just by setting it all up right before you start.

[jimbos'ss]

I would not disable pe, I would filter it out in your histogram.

This^ keeps you safe in case you have to get on it for some reason or you just don't realize how far you've taken it.

[eficalibrator]

If you do your testing under the right conditions, it shouldn't matter. Just log your error as the ratio of delivered lambda over commanded lambda and that should give you the correction factor you need. It doesn't matter if you have 1.00/1.00 or 0.80/0.80, you get the correct correction factor...

[HoP]

In controlled environments (dyno cell ) you can disable the PE and go about your business as usual.

If your not in a controlled environment (on the street) leave it enabled and filter the error as stated above.

[Higgs Boson]

If you do your testing under the right conditions, it shouldn't matter. Just log your error as the ratio of delivered lambda over commanded lambda and that should give you the correction factor you need. It doesn't matter if you have 1.00/1.00 or 0.80/0.80, you get the correct correction factor...

it's true but I like to filter them to separate histograms so I can see where the overlap is not between pe and stoich but part throttle and wot.