Hello all. I have a question.

I have my LTFT adjusted with a MAFT translator and it's at 5% rich, LTRIMS are 0 to -2 average (fuel cells 1-19). I know how to duplicate this in LS1Edit (multiply the MAF transfer table by 106%-108%)

Is WOT (PE vs RPM table) the same way? I'm gonna dyno my car Sat and it has a wide band O2. Right now my MAFT is set max on lean (12 or 15%) and my O2's on autotap are like 930-950. Do I scale the table by 85% (100% - 15%) to duplicate my MAFT setting for WOT?

<small>[ February 11, 2003, 01:51 PM: Message edited by: Mekkadon ]</small>

 

Correct me if I'm wrong guys but your mass air flow rate and PE vs. RPM work the same way, by decreasing the settings you are leaning it out and by increasing the settings you are richening it. My question is when you read your 02's does the lower the number mean you are rich or lean and the same with the higher the number?

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Mekkadon:
<strong> Hello all. I have a question.

I have my LTFT adjusted with a MAFT translator and it's at 5% rich, LTRIMS are 0 to -2 average (fuel cells 1-19). I know how to duplicate this in LS1Edit (multiply the MAF transfer table by 106%-108%)

Is WOT (PE vs RPM table) the same way? I'm gonna dyno my car Sat and it has a wide band O2. Right now my MAFT is set max on lean (12 or 15%) and my O2's on autotap are like 930-950. Do I scale the table by 85% (100% - 15%) to duplicate my MAFT setting for WOT? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">What do your Lterms read at WOT? They should read 0; if not, your cruising Lterms are not negative.
I'd reccomend tapping fuel cells 4 - 16. 18 and 19 are idle cells and 0/1 are 0% throttle cells eg. decelerating off throttle <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
If you are setting MAFT to 15% lean then yes, you need to start scaling the PE vs RPM with an integer below 100% to lean out your mixture.

Just tap your WOT Lterms and make sure everything is 0. If not, tap your cruising Lterms cells 4 thru 16 and get them negative or reeeeally close to 0 on the negative side <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
I'd just hate to see you waste money on the dyno doing all the stuff you can do before you get there <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Best to have everything squared away and use the dyno for WOT dialing only <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by The Dragon:
<strong> What do your Lterms read at WOT? They should read 0; if not, your cruising Lterms are not negative.
I'd reccomend tapping fuel cells 4 - 16. 18 and 19 are idle cells and 0/1 are 0% throttle cells eg. decelerating off throttle <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
If you are setting MAFT to 15% lean then yes, you need to start scaling the PE vs RPM with an integer below 100% to lean out your mixture.

Just tap your WOT Lterms and make sure everything is 0. If not, tap your cruising Lterms cells 4 thru 16 and get them negative or reeeeally close to 0 on the negative side <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
I'd just hate to see you waste money on the dyno doing all the stuff you can do before you get there <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Best to have everything squared away and use the dyno for WOT dialing only <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">thanks for the info dragon. I don't have autotap right now, but I previous logs of my car from a week ago on the 1/8 mile track. LTFT @ WOT are 0 for both banks.

 

get your LTRIMS as close to 0 as you can on WOT, then tune your PE/RPM on the dyno. Use the A/F ratio you get from wideband to tweak your PE table and either lean or richen your car out.

100% richens and -100% leans, same as the MAF table

The IFR table is the one thats bassakwards <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

 

Thanks for the valuable info guys. I will be receiving Autotap tomorrow and will get some good logs of LTFT's @ WOT before I head to the dyno Sat. Last I logged they were @ 0 and I haven't changed anything as far as mods go. Wish me luck.... <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />