how much to adjust PE vs RPM table
Thread Starter
Joined: Nov 2001
Posts: 3,171
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From: Chandler, AZ
how much to adjust PE vs RPM table I read in the ls1edit manual that came with 1.05 that you add fuel with positive numbers and subtract fuel with negative numbers. I wanted to know how much you all have been changing your PE vs RPM tables for A/F changes.
Re: how much to adjust PE vs RPM table No ****, everyone says after you get your part throttle LTRIM's negative then go to the PE vs RPM table w/a WBO2 and tune it but they never say how <img border="0" title="" alt="[Sad]" src="gr_sad.gif" /> . Someone please explain.
Thread Starter
Joined: Nov 2001
Posts: 3,171
Likes: 690
From: Chandler, AZ
Re: how much to adjust PE vs RPM table The other thing I was thinking about kinda differed from what it said in the manual about PE vs RPM. I have seen another person say that PE vs RPM is figured into the est A/F by the computer by taking 14.7/PE value to get your estimated WOT A/F. That doesn't make sense then if you are subtracting fuel with negative values and adding fuel with positive values.
C'mon people, I know there are some out there that know this, my guess is that they feel its some sacred secret or something and can't share. A lot of us need help here!
C'mon people, I know there are some out there that know this, my guess is that they feel its some sacred secret or something and can't share. A lot of us need help here!
TECH Resident
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Joined: Nov 2001
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From: Richmond, VA Where fast cars, well......are hard to come by.
Re: how much to adjust PE vs RPM table I'm still learning/messing with the PE vs. RPM table, but after getting my ltrims between -3 and 0, my o2's were reading .835-.850. I multiplied the whole PE vs. RPM table by 115% and my o2's came up to .890-.900.
Re: how much to adjust PE vs RPM table someone posted that it takes a change of about 6 to 7 % to get 1/2 point ( 12.5 to 13.0 ) of change to A/F ratio .
in other words , multiply by 107% to get a drop in your A/F ratio.
and because the multiplier affects fule to air ( not air to fule) ratio the positive # ( above 100%) will give you richer WOT and less than 100% gives you leaner WOT.
only problem is when i do the calculations on a stock engine the A?F ratio goes to around 12 at WOT??? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
in other words , multiply by 107% to get a drop in your A/F ratio.
and because the multiplier affects fule to air ( not air to fule) ratio the positive # ( above 100%) will give you richer WOT and less than 100% gives you leaner WOT.
only problem is when i do the calculations on a stock engine the A?F ratio goes to around 12 at WOT??? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
