Official / Injector Scaling and Latency Forum
#226
Evolving Member
iTrader: (2)
FIC 1050SP (ANSU diffuser) setting I use:
Scaling = 975
Latency vs Voltage:
4.704
3.504
1.992
1.416
1.056
0.816
0.624
It works great after warm up, but I have huge AFR swing when cold start.
Since these injectors are huge, minimum latency change gives about 5% fuel when warmed-up idle condition, very sensitive (BTW, 93 octane pump gas).
Anybody has suggestion for this cold AFR swing?
Scaling = 975
Latency vs Voltage:
4.704
3.504
1.992
1.416
1.056
0.816
0.624
It works great after warm up, but I have huge AFR swing when cold start.
Since these injectors are huge, minimum latency change gives about 5% fuel when warmed-up idle condition, very sensitive (BTW, 93 octane pump gas).
Anybody has suggestion for this cold AFR swing?
#227
Evolving Member
iTrader: (7)
Looking for some advice, trying to dial in my FIC 1120cc injectors on e85. LTFT Low is between -4% and -5%, LTFT Mid is around +3%. Low has always been negative, and Mid always positive, and I'm not sure how to bring them both closer to zero.
Current tune:
Injector scaling is set for 790
Latency:
V
4.69 3.432
7.03 1.968
9.38 1.344
11.72 0.936
14.06 0.912
16.41 0.648
18.68 0.648
I've been moving the numbers down from 11.72V and under to bring LTFT Low up, and I've been moving the number up from 14.06V and up to bring LTFT Mid down. Now as you can see 11.72V and 14.06V are super close together. Am I going about this the right way? What should I be changing to get these numbers closer to 0?
Current tune:
Injector scaling is set for 790
Latency:
V
4.69 3.432
7.03 1.968
9.38 1.344
11.72 0.936
14.06 0.912
16.41 0.648
18.68 0.648
I've been moving the numbers down from 11.72V and under to bring LTFT Low up, and I've been moving the number up from 14.06V and up to bring LTFT Mid down. Now as you can see 11.72V and 14.06V are super close together. Am I going about this the right way? What should I be changing to get these numbers closer to 0?
#228
Evolving Member
iTrader: (5)
Looking for some advice, trying to dial in my FIC 1120cc injectors on e85. LTFT Low is between -4% and -5%, LTFT Mid is around +3%. Low has always been negative, and Mid always positive, and I'm not sure how to bring them both closer to zero.
Current tune:
Injector scaling is set for 790
Latency:
V
4.69 3.432
7.03 1.968
9.38 1.344
11.72 0.936
14.06 0.912
16.41 0.648
18.68 0.648
I've been moving the numbers down from 11.72V and under to bring LTFT Low up, and I've been moving the number up from 14.06V and up to bring LTFT Mid down. Now as you can see 11.72V and 14.06V are super close together. Am I going about this the right way? What should I be changing to get these numbers closer to 0?
Current tune:
Injector scaling is set for 790
Latency:
V
4.69 3.432
7.03 1.968
9.38 1.344
11.72 0.936
14.06 0.912
16.41 0.648
18.68 0.648
I've been moving the numbers down from 11.72V and under to bring LTFT Low up, and I've been moving the number up from 14.06V and up to bring LTFT Mid down. Now as you can see 11.72V and 14.06V are super close together. Am I going about this the right way? What should I be changing to get these numbers closer to 0?
#230
Evolving Member
iTrader: (5)
Put those scalings back in and decrease all of them until 14v is .888
Last edited by edsct9a; May 13, 2016 at 08:21 AM.
#233
Evolving Member
iTrader: (7)
I'm sorry, but this seems confusing to me. By changing the latency values to what you posted before, I would be back at square one when I first put in e85 and at that point my fuel trims were not good. LTFT Low was like -12.5%, Mid was at like +10%. I have been adjusting these values to bring fuel trims closer to 0. So again, it seems that by moving the latency values back to where they were, my fuel trims would again be wrong.
Additionally, by changing the injector scaling value, that will also affect fuel trims. So why would I just the scaling after my fuel trims were dialed in?
Additionally, by changing the injector scaling value, that will also affect fuel trims. So why would I just the scaling after my fuel trims were dialed in?
#234
Evolving Member
iTrader: (5)
I'm sorry, but this seems confusing to me. By changing the latency values to what you posted before, I would be back at square one when I first put in e85 and at that point my fuel trims were not good. LTFT Low was like -12.5%, Mid was at like +10%. I have been adjusting these values to bring fuel trims closer to 0. So again, it seems that by moving the latency values back to where they were, my fuel trims would again be wrong.
Additionally, by changing the injector scaling value, that will also affect fuel trims. So why would I just the scaling after my fuel trims were dialed in?
Additionally, by changing the injector scaling value, that will also affect fuel trims. So why would I just the scaling after my fuel trims were dialed in?
Last edited by edsct9a; May 13, 2016 at 09:21 AM.
#235
Anyone got some decent scaling/latency values for the RC1600 injectors?
I've been having a hard time calibrating them on a Motec M800 ECU, I'm going to give it a shot on a stock ECU.
I've been having a hard time calibrating them on a Motec M800 ECU, I'm going to give it a shot on a stock ECU.
#236
Evolving Member
iTrader: (7)
I'm simply saying to start over. I don't understand why you raised the 14v if you were negative in the low trims and positive on the mids. If it's that way you would decrease latency. And for now I would adjust all latency at the same rate so +/- .024. I think messing with them individually is causing you the headache.
#237
Evolving Member
iTrader: (3)
ID 1000s
Scaling: 812
latencies
4.69v = 5.328
7.03v = 3.144
9.38v = 1.992
11.72v = 1.368
14.06v = 1.008
16.41v = .792
18.68v = .624
Scaling: 812
latencies
4.69v = 5.328
7.03v = 3.144
9.38v = 1.992
11.72v = 1.368
14.06v = 1.008
16.41v = .792
18.68v = .624
ID 1000s
Scaling 812
3.816
3.144
1.944
1.392
0.984
0.72
0.504
These were posted on the original post but I am assuming these are for E85?
Scaling 812
3.816
3.144
1.944
1.392
0.984
0.72
0.504
These were posted on the original post but I am assuming these are for E85?
#240
Account Disabled
Latencies are NOT a fixed number
There's an opening delay, there's also a closing delay, it's the difference between the two.
There's 3 things that affect latency.
Nobody seems to mention them, no doubt because they don't actually understand.
1/ is the injector its self.
2/ is the circuitry used to drive the injector.
3/ is the fuel pressure.
The numbers are ALWAYS wrong. Fuel pressure makes a big difference.
No 1 is easy, you just google it.
No 2, well if google says that the results come from a Motec and you're using a Mitsubishi computer, the numbers won't be the same.
No 3 is what nobody mentions....There should be always EXACTLY 3 bar pressure across the injector.
You go fit a bigger pump, hotwire it, your idle fuel pressure is always too high (outflowing the regulator) so not only does it run too rich at low load (fuel trims pegged out) but the pressure varies with electrical load (voltage).....but you don't know because either you don't measure the pressure or if you do........you try to convince yourself that it's correct when it's NOT.
There's an opening delay, there's also a closing delay, it's the difference between the two.
There's 3 things that affect latency.
Nobody seems to mention them, no doubt because they don't actually understand.
1/ is the injector its self.
2/ is the circuitry used to drive the injector.
3/ is the fuel pressure.
The numbers are ALWAYS wrong. Fuel pressure makes a big difference.
No 1 is easy, you just google it.
No 2, well if google says that the results come from a Motec and you're using a Mitsubishi computer, the numbers won't be the same.
No 3 is what nobody mentions....There should be always EXACTLY 3 bar pressure across the injector.
You go fit a bigger pump, hotwire it, your idle fuel pressure is always too high (outflowing the regulator) so not only does it run too rich at low load (fuel trims pegged out) but the pressure varies with electrical load (voltage).....but you don't know because either you don't measure the pressure or if you do........you try to convince yourself that it's correct when it's NOT.
Last edited by RightSaid fred; Nov 23, 2016 at 03:41 PM.