Injector scaling and latecy for different injectors.
May 1, 2007, 08:53 AM
#151
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very minor adjustments might be needed. if the injectors where scaled perfectly like stock, ie 0% fuel trims, then no adjustments to the fuel map will be needed.
now, it turns out the the scaling of my injectors is on the lean side (-2%). so if you want, you can richen up the WOT sections of your fuel map by 0.1 points, or lower the scaling to 590.
now, it turns out the the scaling of my injectors is on the lean side (-2%). so if you want, you can richen up the WOT sections of your fuel map by 0.1 points, or lower the scaling to 590.
May 10, 2007, 10:30 PM
#155
I used this settings and I am also more or less the same values. My O2 fluctuates between +/- 6 and my trims are 0.
This is for the PTEs 780.
4.69 3.504
7.03 2.184
9.38 1.224
11.72 0.96
14.06 0.744
16.41 0.552
18.68 0.432
injector scaling 696
cpoevo,
Thanks for sharing your hard work!
This is for the PTEs 780.
4.69 3.504
7.03 2.184
9.38 1.224
11.72 0.96
14.06 0.744
16.41 0.552
18.68 0.432
injector scaling 696
cpoevo,
Thanks for sharing your hard work!
May 10, 2007, 10:38 PM
#156
Glad they worked for you. I have a set of 680's I might do the same thing with and get a good base setting for people to start with.
I spent about 40 hours of different injector sizes and latencies to get those perfect. I also noticed that cam gear settings will affect your fuel trims.
I spent about 40 hours of different injector sizes and latencies to get those perfect. I also noticed that cam gear settings will affect your fuel trims.
May 12, 2007, 03:17 PM
#158
I used this settings and I am also more or less the same values. My O2 fluctuates between +/- 6 and my trims are 0.
This is for the PTEs 780.
4.69 3.504
7.03 2.184
9.38 1.224
11.72 0.96
14.06 0.744
16.41 0.552
18.68 0.432
injector scaling 696
cpoevo,
Thanks for sharing your hard work!
This is for the PTEs 780.
4.69 3.504
7.03 2.184
9.38 1.224
11.72 0.96
14.06 0.744
16.41 0.552
18.68 0.432
injector scaling 696
cpoevo,
Thanks for sharing your hard work!
Im going to give this a try tonight when i get home.. Im hoping it helps out!!
May 15, 2007, 09:40 AM
#161
Oracle, I'd try 713 since our scaling is different to the US cars.
Adjust it up or down to near zero the cruise fuel trim.
Let it warm idle and change the entire block of latencies up or down by 0.24ms to near zero the idle fuel trim.
Only then consider using any boost, start with wastegate pressure only (zero duty) and check the AFR. Then build up through intermediate levels. If it is lean, lift off the throttle. You or a passenger needs to watch an AFR gauge, no use driving the car hard whilst logging and checking afterwards, more than a few seconds running lean can result in engine damage. Running really rich - eg richer than 10:1, certainly 9:1 may bog the car and cause misfires.
Adjust it up or down to near zero the cruise fuel trim.
Let it warm idle and change the entire block of latencies up or down by 0.24ms to near zero the idle fuel trim.
Only then consider using any boost, start with wastegate pressure only (zero duty) and check the AFR. Then build up through intermediate levels. If it is lean, lift off the throttle. You or a passenger needs to watch an AFR gauge, no use driving the car hard whilst logging and checking afterwards, more than a few seconds running lean can result in engine damage. Running really rich - eg richer than 10:1, certainly 9:1 may bog the car and cause misfires.
May 15, 2007, 02:49 PM
#162
I'm working on getting my trims in check when i noticed something...
I got 272 cams and my idle is set at 970 so it kind of goes up and down in that area. My ign map is stock in this load (round 40) and rpm. So when it idles, advance fluctuates between 5 and 12. That would mean that afr's fluctuate all the time as well, which in turn makes STFT's work overtime...and might mess the low LTFT's a bit.
So changing that part of map will probably make for more consistent idle stft's and maybe smoother idle?
I got 272 cams and my idle is set at 970 so it kind of goes up and down in that area. My ign map is stock in this load (round 40) and rpm. So when it idles, advance fluctuates between 5 and 12. That would mean that afr's fluctuate all the time as well, which in turn makes STFT's work overtime...and might mess the low LTFT's a bit.
So changing that part of map will probably make for more consistent idle stft's and maybe smoother idle?
May 16, 2007, 08:33 AM
#163
I used this settings and I am also more or less the same values. My O2 fluctuates between +/- 6 and my trims are 0.
This is for the PTEs 780.
4.69 3.504
7.03 2.184
9.38 1.224
11.72 0.96
14.06 0.744
16.41 0.552
18.68 0.432
injector scaling 696
cpoevo,
Thanks for sharing your hard work!
This is for the PTEs 780.
4.69 3.504
7.03 2.184
9.38 1.224
11.72 0.96
14.06 0.744
16.41 0.552
18.68 0.432
injector scaling 696
cpoevo,
Thanks for sharing your hard work!
I tried those settings, they are VERY VERY close..
The low/mid trim is right now. which is wonderful!!
my WOT was only about 5 percent off..
Thank you again for the settings.
