which pids for ve tuning w o2s

[ssmike300]

i think i got it now but which pids insted of wide band is it ltftaverage or just ltft and when it comes time to past and mutiply do you still paste w lable and mutiply.

[mr.prick]

don`t waste your time with LTFT + STFT tuning.
get a WBO2, they can be had for less than $200
and are way more accurate than LTFTs/STFTs,
you will need to make a calculated PID.
{LTFT/STFT bank #1} + {LTFT/STFT bank #2}/2 for an
average number, then paste multiply/add/subtract.
or use a spreadsheet, and then you will still not be certain
of where you are actually at with AFR.

[joecar]

If you really wanted to do this using fuel trims instead of a wideband, you would have to create a
calculated "BEN" pid for (LONGFT1 + LONGFT2)/200 in the calc_pids.txt file located in
My Documents\EFILive\V7.5\User Configuration;
see showthread.php?t=132 (http://forum.efilive.com/showthread.php?t=132) for how to make calc pids;
note: doing this, you would have to leave closed loop and trims enabled.

You would also create a "BEN" map that used this claculated pid as data instead of a BEN pid;
then you can log, and paste-multiply directly into the VE table; the AutoVE tutorial shows how to create maps.

Mr.Prick is right, a wideband is not expensive and will give you much better results in a shorter time...
but does require some time/effort to install and setup.

[ssmike300]

thank you both vevy very much i found an lc-1 stand alone controler kit in summit for 199.95 is that one you would recomend

[dfe1]

The "best" approach depends on the type of vehicle you're working on and what you're trying to achieve. If you're working on a stock-type vehicle and just want to optimize part throttle operation, the in-car narrow band is fine. All you have to do is work the VE table until the LTFTs are where you want them. BUT- if you're tuning part throttle AFRs, you're probably going to do WOT at some point in time, and you'll need a wide band for that. If you're going to borrow a wide band and only have it for a limited period of time, it's definitely advantageous to tune with the narrow band sensors so you can concentrate on WOT tuning while you have the wide band.

[mr.prick]

here is a link to a nice spreadsheet for what you are attempting.
http://forum.efilive.com/showpost.php?p=53885&postcount=2
IMO a WBO2 must be used in order to be certain of your
fueling, especially if you are not experienced with how
a motor will sound or perform when running lean or rich.
you could potentially end up chasing your own tail.