Startup Tune for the Project Truck
11-11-2007, 10:38 AM
#32
Up until a few days ago I was going to go with MAF tuning but I am considering SD now. First order of business is to get the truck started and broken in without running pig rich the whole time
11-11-2007, 11:00 AM
#33
As I understand it - My disclaimer
Retrunless is a fixed fuel pressure so the injectors flow differently volumes becacuse of varying MAP pressure.
Return is a variable fuel pressure via FPR in fuel rail so as MAP increases the fuel pressure increases maintaining the same flow rate.
Retrunless is a fixed fuel pressure so the injectors flow differently volumes becacuse of varying MAP pressure.
Return is a variable fuel pressure via FPR in fuel rail so as MAP increases the fuel pressure increases maintaining the same flow rate.
11-11-2007, 11:03 AM
#34
As I understand it - My disclaimer
Retrunless is a fixed fuel pressure so the injectors flow differently volumes becacuse of varying MAP pressure.
Return is a variable fuel pressure via FPR in fuel rail so as MAP increases the fuel pressure increases maintaining the same flow rate.
Retrunless is a fixed fuel pressure so the injectors flow differently volumes becacuse of varying MAP pressure.
Return is a variable fuel pressure via FPR in fuel rail so as MAP increases the fuel pressure increases maintaining the same flow rate.
11-11-2007, 11:09 AM
#35
Yes, the varying pressure in the manifold and fixed pressure on the fuel side creates a variable flow rate. Less pressure in manifold more fuel flow, more pressure manifold less fuel flow.
There is a nice spreadsheet floating around that will calculate these values for you and also a nice .cfg file for tuning the RAF. Check HPT forums.
There is a nice spreadsheet floating around that will calculate these values for you and also a nice .cfg file for tuning the RAF. Check HPT forums.
11-11-2007, 11:38 AM
#36
found this, would this be a good starting point for the data I need?
these were tested directly by an engineer at a major automotive manufacturer. That's the nice thing about having connections in the business, plus being an SCT and DiabloSport tuning dealer (these companies give us true tech support, such as this). These values have been used by most all Ford tuners for a couple years now, or more, without any issues.
I still haven't quite figured out why someone on the GM tuning side has yet to ever get with a contact directly at GM to flow test a bunch of various and most popularly used injectors, thus having all the values for all the various injector parameters. I wish I knew someone at GM who could do this. Surely someone on here does, however. Would be nice. Until then I'll just keep extracting the data I use for Fords.
Regards,
James
Originally Posted by RWTD
Here's some data we use on the Fords for the SD 60s (aka 62.7# at 43.5 psi, aka 72.39 at 58 psi):
Minimum Pulsewidth:
0.1296997 ms
Injector Compensation for Battery Voltage:
Use the interpolation command to fill in the values between those voltage ranges.
As for the "Short Pulse Adder", Ford doesn't have such, so my best guess would be to just zero out that table. However, the advice of others is welcome here, please.
As an example, I took a 2000 Silverado 5.3 file and figured in the correct values for the table based on the above data. Due to minimum value requirements on the GM pcms, the values won't match up exact, but I made them as close as possible. And, no, I haven't tested this out yet, but I'm trying to get Kenny (BigKID) to do just that as I type this, LOL!
Min Injector Pulse:
Offset vs. Volts vs. VAC:
This particular vehicle has a regulated system, FYI, hence the same values at all the various vacuum ranges.
This should be a bit of help for everyone.
Minimum Pulsewidth:
0.1296997 ms
Injector Compensation for Battery Voltage:
Code:
VOLT PW ms 15.99 0.33886 15 0.33886 14 0.41210 13 0.48925 12 0.59082 11 0.74121 10 0.93359 8 1.44628 6 2.54101 0 2.54101 0 2.54101 0 2.54101
As for the "Short Pulse Adder", Ford doesn't have such, so my best guess would be to just zero out that table. However, the advice of others is welcome here, please.
As an example, I took a 2000 Silverado 5.3 file and figured in the correct values for the table based on the above data. Due to minimum value requirements on the GM pcms, the values won't match up exact, but I made them as close as possible. And, no, I haven't tested this out yet, but I'm trying to get Kenny (BigKID) to do just that as I type this, LOL!
Min Injector Pulse:
Code:
RPM 0 400 800 1200 1600 2000 2400 2800 3200 3600 4000 4400 4800 5200 5600 6000 6400 6800 7200 7600 8000 Min InjPW 0.13678 0.13678 0.13678 0.13678 0.13678 0.13678 0.13678 0.13678 0.13678 0.13678 0.13678 0.13678 0.13678 0.13678 0.13678 0.13678 0.13678 0.13678 0.13678 0.13678 0.13678
This particular vehicle has a regulated system, FYI, hence the same values at all the various vacuum ranges.
Code:
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 4.5 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 5.0 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 5.5 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 6.0 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 2.54826 6.5 2.27359 2.27359 2.27359 2.27359 2.27359 2.27359 2.27359 2.27359 2.27359 2.27359 2.27359 2.27359 2.27359 2.27359 2.27359 2.27359 2.27359 7.0 1.99893 1.99893 1.99893 1.99893 1.99893 1.99893 1.99893 1.99893 1.99893 1.99893 1.99893 1.99893 1.99893 1.99893 1.99893 1.99893 1.99893 7.5 1.61746 1.61746 1.61746 1.61746 1.61746 1.61746 1.61746 1.61746 1.61746 1.61746 1.61746 1.61746 1.61746 1.61746 1.61746 1.61746 1.61746 8.0 1.44961 1.44961 1.44961 1.44961 1.44961 1.44961 1.44961 1.44961 1.44961 1.44961 1.44961 1.44961 1.44961 1.44961 1.44961 1.44961 1.44961 8.5 1.31228 1.31228 1.31228 1.31228 1.31228 1.31228 1.31228 1.31228 1.31228 1.31228 1.31228 1.31228 1.31228 1.31228 1.31228 1.31228 1.31228 9.0 1.19020 1.19020 1.19020 1.19020 1.19020 1.19020 1.19020 1.19020 1.19020 1.19020 1.19020 1.19020 1.19020 1.19020 1.19020 1.19020 1.19020 9.5 1.05287 1.05287 1.05287 1.05287 1.05287 1.05287 1.05287 1.05287 1.05287 1.05287 1.05287 1.05287 1.05287 1.05287 1.05287 1.05287 1.05287 10.0 0.93080 0.93080 0.93080 0.93080 0.93080 0.93080 0.93080 0.93080 0.93080 0.93080 0.93080 0.93080 0.93080 0.93080 0.93080 0.93080 0.93080 10.5 0.83925 0.83925 0.83925 0.83925 0.83925 0.83925 0.83925 0.83925 0.83925 0.83925 0.83925 0.83925 0.83925 0.83925 0.83925 0.83925 0.83925 11.0 0.74769 0.74769 0.74769 0.74769 0.74769 0.74769 0.74769 0.74769 0.74769 0.74769 0.74769 0.74769 0.74769 0.74769 0.74769 0.74769 0.74769 11.5 0.67140 0.67140 0.67140 0.67140 0.67140 0.67140 0.67140 0.67140 0.67140 0.67140 0.67140 0.67140 0.67140 0.67140 0.67140 0.67140 0.67140 12.0 0.59510 0.59510 0.59510 0.59510 0.59510 0.59510 0.59510 0.59510 0.59510 0.59510 0.59510 0.59510 0.59510 0.59510 0.59510 0.59510 0.59510 12.5 0.53407 0.53407 0.53407 0.53407 0.53407 0.53407 0.53407 0.53407 0.53407 0.53407 0.53407 0.53407 0.53407 0.53407 0.53407 0.53407 0.53407 13.0 0.48829 0.48829 0.48829 0.48829 0.48829 0.48829 0.48829 0.48829 0.48829 0.48829 0.48829 0.48829 0.48829 0.48829 0.48829 0.48829 0.48829 13.5 0.44251 0.44251 0.44251 0.44251 0.44251 0.44251 0.44251 0.44251 0.44251 0.44251 0.44251 0.44251 0.44251 0.44251 0.44251 0.44251 0.44251 14.0 0.41199 0.41199 0.41199 0.41199 0.41199 0.41199 0.41199 0.41199 0.41199 0.41199 0.41199 0.41199 0.41199 0.41199 0.41199 0.41199 0.41199 14.5 0.36622 0.36622 0.36622 0.36622 0.36622 0.36622 0.36622 0.36622 0.36622 0.36622 0.36622 0.36622 0.36622 0.36622 0.36622 0.36622 0.36622 15.0 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 15.5 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 16.0 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 16.5 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 17.0 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 17.5 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 18.0 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570 0.33570
Originally Posted by RWTD
these were tested directly by an engineer at a major automotive manufacturer. That's the nice thing about having connections in the business, plus being an SCT and DiabloSport tuning dealer (these companies give us true tech support, such as this). These values have been used by most all Ford tuners for a couple years now, or more, without any issues.
I still haven't quite figured out why someone on the GM tuning side has yet to ever get with a contact directly at GM to flow test a bunch of various and most popularly used injectors, thus having all the values for all the various injector parameters. I wish I knew someone at GM who could do this. Surely someone on here does, however. Would be nice. Until then I'll just keep extracting the data I use for Fords.
Regards,
James