Injector scaling and latecy for different injectors.
#783
Evolved Member
iTrader: (13)
Here is mine for the Precision 780cc that I used to achieve -2 and -3 in the LTFT Low and Mid. I have been driving the car almost 100 miles with in the last 3 days. Can it be better?
597
4.6875 3.504
7.03125 2.184
9.375 1.320
11.7188 0.912
14.0625 0.696
16.4062 0.360
18.6768 0.240
597
4.6875 3.504
7.03125 2.184
9.375 1.320
11.7188 0.912
14.0625 0.696
16.4062 0.360
18.6768 0.240
My injector is 780 but I can't get any good LTFT trim using most of the values posted here. I followed MalibuJack and l2r99gst posts and able to finally get it dial in with -3 and -2 for the Low and Mid LTFTs and it has been like that for the last few days driving.
Some of the other settings even made my car throw idle too lean p0171 or my fuel trim was too far of range (+12, -15..). Is my scale value is too low for the 780? Thanks.
#784
Evolved Member
iTrader: (30)
It would be great if you could fill in the wiki:
http://evoecu.logic.net/wiki/
http://evoecu.logic.net/wiki/
#785
Evolved Member
iTrader: (2)
No, tephra was suggesting that if you have injector latencies to share (or are going through the trouble of tracking them down anyway), perhaps it would be worthwhile to create a page on the wiki, and get the ball rolling with a central location for this kind of information.
#786
EvoM Community Team
iTrader: (15)
No, tephra was suggesting that if you have injector latencies to share (or are going through the trouble of tracking them down anyway), perhaps it would be worthwhile to create a page on the wiki, and get the ball rolling with a central location for this kind of information.
Also, if you are having trouble like the rest of us (we are all in this failboat together) you can use google like
Code:
[search terms] site:evolutionm.net
#787
Evolved Member
iTrader: (21)
I have the Low Trim showing -1.2 but the mid is showing -12.6. My STFT are right within +/- 5%. These are my current scaling and latencies.
860
4.6875 3.312
7.03125 1.680
9.375 1.344
11.7188 1.152
14.0625 0.840
16.4062 0.360
18.6768 0.240
860 scaling is what everyone seems to be using for the FIC 1000's. Any ideas on what to adjust to get the mid back in line??
Thanks again
860
4.6875 3.312
7.03125 1.680
9.375 1.344
11.7188 1.152
14.0625 0.840
16.4062 0.360
18.6768 0.240
860 scaling is what everyone seems to be using for the FIC 1000's. Any ideas on what to adjust to get the mid back in line??
Thanks again
Last edited by SEEnoEVO; Apr 19, 2009 at 03:52 PM.
#790
EvoM Community Team
iTrader: (15)
My method is to get correct latencies, then use scaling to get the mid in check. Lastly rescale the MAF to get Idle in check.
#791
Evolved Member
iTrader: (21)
OK I am in need of help DESPERATELY!!!! I struggled with the FIC 1000's so I figured I would switch out injectors just to see if I could rule them out. I now have FIC 1050's and am still having tons of issues. I make changes, and the numbers I get from LTFT make no sense. For instance, I was at 1008 scaling and set latencies, Low came in at around -7 and Mid was -12. I figured....well lets up the scaling. I up the scaling to 1044. Then i get Low of -8 and Mid of -11.3. I am completely lost. I know based on them both being negative, I should be upping the scaling even more but with the numbers i keep seeing with the changes, I am not even sure anymore. I have been battling this for about a week and am very frustrated at this time. Someone please help!!! These are my current settings that gave me the low of -8 and mid of -11.3.
Scaling 1044
4.6875 4.512
7.03125 3.408
9.375 1.896
11.7188 1.248
14.0625 0.984
16.4062 0.624
18.6768 0.432
Scaling 1044
4.6875 4.512
7.03125 3.408
9.375 1.896
11.7188 1.248
14.0625 0.984
16.4062 0.624
18.6768 0.432
#792
Evolved Member
iTrader: (37)
Join Date: Sep 2003
Location: Spec-Ops Motorsports, Fayetteville, NC
Posts: 3,146
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OK I am in need of help DESPERATELY!!!! I struggled with the FIC 1000's so I figured I would switch out injectors just to see if I could rule them out. I now have FIC 1050's and am still having tons of issues. I make changes, and the numbers I get from LTFT make no sense. For instance, I was at 1008 scaling and set latencies, Low came in at around -7 and Mid was -12. I figured....well lets up the scaling. I up the scaling to 1044. Then i get Low of -8 and Mid of -11.3. I am completely lost. I know based on them both being negative, I should be upping the scaling even more but with the numbers i keep seeing with the changes, I am not even sure anymore. I have been battling this for about a week and am very frustrated at this time. Someone please help!!! These are my current settings that gave me the low of -8 and mid of -11.3.
Scaling 1044
4.6875 4.512
7.03125 3.408
9.375 1.896
11.7188 1.248
14.0625 0.984
16.4062 0.624
18.6768 0.432
Scaling 1044
4.6875 4.512
7.03125 3.408
9.375 1.896
11.7188 1.248
14.0625 0.984
16.4062 0.624
18.6768 0.432
1044 is too high for 1050's ... id start with a mid 900 probably maybe even lower. Then also drop your first 3 voltages. Should be a good starting point.
#793
Evolved Member
iTrader: (21)
See I thought that if they are both showing negative trims, it means it has to drop fuel by that percentage. The way you counteract that is by raising the scaling. If i drop the scaling down in the 900's it should be dumping much more gas and want to pull even more out. Isnt this correct? Or do I have this all wrong?
#794
EvoM Guru
iTrader: (50)
See I thought that if they are both showing negative trims, it means it has to drop fuel by that percentage. The way you counteract that is by raising the scaling. If i drop the scaling down in the 900's it should be dumping much more gas and want to pull even more out. Isnt this correct? Or do I have this all wrong?
What voltage does the car run at?