Need help with LS1edit Tuning
Thread Starter
TECH Enthusiast
Joined: Mar 2002
Posts: 505
Likes: 0
From: NJ
Need help with LS1edit Tuning I installed headers a few weeks ago and have finally got time to play with the car. Its running pig rich and i need to lean it out a bit.
What should i be watching when i'm Atapping to edit with LS1 edit? Besides 02 milivolts at wot, what else needs to be used as a refernce to tune?
What should i be watching when i'm Atapping to edit with LS1 edit? Besides 02 milivolts at wot, what else needs to be used as a refernce to tune?
Re: Need help with LS1edit Tuning I like to data log LTrims (Right and Left), O2's, RPM, MAF flow rate, and MAF frequency, when looking at stuff like this.
Watch the LTrims. If they are slightly negative (-8 to -1), you're fine. If they are further out than that, then you might consider scaling down the MAF table at that frequency range by a couple percent, and then logging again.
If your LTrims are positive, then you might consider scaling the MAF values upwards by a few percent at a time, until your LTrims go slightly negative.
See this post for more info:
https://ls1tech.com/ubb/ultimatebb.p...;f=23;t=003847
HTH,
Andrew
Watch the LTrims. If they are slightly negative (-8 to -1), you're fine. If they are further out than that, then you might consider scaling down the MAF table at that frequency range by a couple percent, and then logging again.
If your LTrims are positive, then you might consider scaling the MAF values upwards by a few percent at a time, until your LTrims go slightly negative.
See this post for more info:
https://ls1tech.com/ubb/ultimatebb.p...;f=23;t=003847
HTH,
Andrew
Thread Starter
TECH Enthusiast
Joined: Mar 2002
Posts: 505
Likes: 0
From: NJ
Re: Need help with LS1edit Tuning Hers what i got. IDLE, and three spots on the RPM range.
IDLE
MAF .89
MAF Freq 2482hz
RPM 796.3
LTB1 -1.6%
02B1S1 .875v
02B2S2 .900v
Ignition Timing advance -22.0
WOT1 4th gear 2k -5k
MAF 11.21
MAF Freq 6663hz
RPM 2600
LTB1 1.6%
02B1S1 .880v
02B2S2 .880v
Ignition Timing advance -29.0
MAF 16.28
MAF Freq 7527hz
RPM 3541
LTB1 1.6%
02B1S1 .875v
02B2S2 .895v
Ignition Timing advance -27.5
MAF 8.60
MAF Freq 5186hz
RPM 4624
LTB1 -1.6%
02B1S1 .845v
02B2S2 .875v
Ignition Timing advance -41.0
Looks ok to me, is it supposed to be pulling that much timing?
IDLE
MAF .89
MAF Freq 2482hz
RPM 796.3
LTB1 -1.6%
02B1S1 .875v
02B2S2 .900v
Ignition Timing advance -22.0
WOT1 4th gear 2k -5k
MAF 11.21
MAF Freq 6663hz
RPM 2600
LTB1 1.6%
02B1S1 .880v
02B2S2 .880v
Ignition Timing advance -29.0
MAF 16.28
MAF Freq 7527hz
RPM 3541
LTB1 1.6%
02B1S1 .875v
02B2S2 .895v
Ignition Timing advance -27.5
MAF 8.60
MAF Freq 5186hz
RPM 4624
LTB1 -1.6%
02B1S1 .845v
02B2S2 .875v
Ignition Timing advance -41.0
Looks ok to me, is it supposed to be pulling that much timing?
Re: Need help with LS1edit Tuning Well, by looking at that data, I'll say this much:
Don't bother looking at idle unless your LTFT are maxed out (+25% or -25%)
Your WOT spot is adding fuel. At WOT LTFT should be at 0. Re log LTFT averages and see where you stand, try to lower LTFT in the negatives.( Like Camaroholic said)
spot 3 and 4 are ok I guess, are you at WOT on these?
That's about all I can make out of the data posted.
Don't bother looking at idle unless your LTFT are maxed out (+25% or -25%)
Your WOT spot is adding fuel. At WOT LTFT should be at 0. Re log LTFT averages and see where you stand, try to lower LTFT in the negatives.( Like Camaroholic said)
spot 3 and 4 are ok I guess, are you at WOT on these?
That's about all I can make out of the data posted.
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