Tuning Ltrims
Thread Starter
Joined: Apr 2003
Posts: 2,597
Likes: 4
From: Lawrenceville, GA
Tuning Ltrims I just received EFILive and LS1 Edit and have ran a few logs. My Ltrims are running around 5.0 to 7.0. The 7.0 was logging in the evening and 5.0 in morning. I was thinking of multipling the Injector Flow Rate Table by 106%. Is this the right table? There is just one line of data. I just wanted to make sure this is the right table.
Thanks,
BowlingSS
From slowcar.net
tuning ltrims by modifing the IFR table....
multipling the table by >100% will make you leaner.
multipling the table by <100% will make you richer.
this is the way it was explained to me - makes sense if you think about it....
you are multipling the injector flow rate.
the larger the value is - the larger the pcm thinks the injector is (able to spray more fuel), so the pcm shortens the injector pulse width time (length of time the injector sprays fuel), thus making you leaner. the opposite is also true.... smaller numbers makes the pcm think small injector flow, so it lengthens the pulse width, thus making you richer.
Thanks,
BowlingSS
From slowcar.net
tuning ltrims by modifing the IFR table....
multipling the table by >100% will make you leaner.
multipling the table by <100% will make you richer.
this is the way it was explained to me - makes sense if you think about it....
you are multipling the injector flow rate.
the larger the value is - the larger the pcm thinks the injector is (able to spray more fuel), so the pcm shortens the injector pulse width time (length of time the injector sprays fuel), thus making you leaner. the opposite is also true.... smaller numbers makes the pcm think small injector flow, so it lengthens the pulse width, thus making you richer.
Last edited by Bill Bowling; Jan 15, 2004 at 06:20 PM.
Joined: Nov 2001
Posts: 34,629
Likes: 2,550
From: Schiller Park, ILL Member: #317
I did the oppsite. I multiplied the IFR table by 95% (.95). This worked well to drop my Ltrims some. I could probably go farther if I wanted to (went from +10% average to about +3).....
