AFR's at speed - open loop
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From: Y-cat-o NZ
AFR's at speed - open loop
Just for fun I did a log of a high speed run today & thought it may be of interest .
First part of run is in 6th gear then I stopped & turned around giving it full throttle in 1st & 2nd before holding in second while waiting to pass a car .
Note how closely related to throttle posn. the AFRs are . I have about 10% fuel trimmed through my piggyback in most load points you see here.
First part of run is in 6th gear then I stopped & turned around giving it full throttle in 1st & 2nd before holding in second while waiting to pass a car .
Note how closely related to throttle posn. the AFRs are . I have about 10% fuel trimmed through my piggyback in most load points you see here.
Last edited by Brettus; Apr 28, 2013 at 04:10 PM.
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throttle release causes less fuel injected = lean AFR
Look up NA tuning experiments on this site. It really helped me during my tuning days.
So you're doing 10% reduction all the way? Even below 5800 rpm? I wouldn't touch fuel trims below that range unless you want your car to start injecting more fuel than you need in cruising speeds (in the long term)
Look up NA tuning experiments on this site. It really helped me during my tuning days.
So you're doing 10% reduction all the way? Even below 5800 rpm? I wouldn't touch fuel trims below that range unless you want your car to start injecting more fuel than you need in cruising speeds (in the long term)
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From: Y-cat-o NZ
Originally Posted by Xyntax
throttle release causes less fuel injected = lean AFR
Look up NA tuning experiments on this site. It really helped me during my tuning days.
So you're doing 10% reduction all the way? Even below 5800 rpm? I wouldn't touch fuel trims below that range unless you want your car to start injecting more fuel than you need in cruising speeds (in the long term)
Look up NA tuning experiments on this site. It really helped me during my tuning days.
So you're doing 10% reduction all the way? Even below 5800 rpm? I wouldn't touch fuel trims below that range unless you want your car to start injecting more fuel than you need in cruising speeds (in the long term)
Long term fuel Trims shouldn't be affected by these rare occurances .
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