Those with over 10psi on roushcarger...
#17
06-09-2013, 10:01 AM
Join Date: Jan 2012
Location: Colorado Springs
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Ok my pump FINALLY arrived, this is the one I ordered: http://www.fuel-pumps.net/tu275hp.html I ordered this pump around April 8th
Will this be enough pump?
I have an 8# lower on the wall here which should get me just shy of 15psi.
The front mount intercooler needs to get mounted yet. I've not had time to mess with that.
I have 39# injectors and stock maf, will these need to be upgraded?
Will this be enough pump?I have an 8# lower on the wall here which should get me just shy of 15psi.
The front mount intercooler needs to get mounted yet. I've not had time to mess with that.
I have 39# injectors and stock maf, will these need to be upgraded?
#21
06-09-2013, 09:27 PM
Sure if you don't mind possibly blowing up the engine at WOT. Twin runs dual pumps as does fatherford. I would get a dual pump unit and you'll need atleast 60lb injectors. 39lb and stock pump is asking for problems.
15psi can be done with a built trans and stock bottom end just depends on tune and how you drive. Again look at twin at 13-15psi. Also you need a better MAF you'll peg the one you have now. Sct makes some you'll never max
15psi can be done with a built trans and stock bottom end just depends on tune and how you drive. Again look at twin at 13-15psi. Also you need a better MAF you'll peg the one you have now. Sct makes some you'll never max
#22
06-23-2013, 07:30 PM
On the returnless systems... If the fuel pump or injectors hit a duty cycle above 90% it is time to upgrade. Both the fuel pump AND the injectors are duty cycle controlled. This means the pump is CONSTANTLY pulsing ON AND OFF. Under WOT, the duty cycle increases to maintain fuel pressure.
The 97-03 return systems ran the pump(s) the entire time the engine is running, returning unused fuel to the tank for cooling to prevent vaporization. In this case, you look at injector duty cycle and fuel pressure at WOT. You also look at A/F ratios, and as Jason said, it is a good idea to look at EGT as well.
The 97-03 return systems ran the pump(s) the entire time the engine is running, returning unused fuel to the tank for cooling to prevent vaporization. In this case, you look at injector duty cycle and fuel pressure at WOT. You also look at A/F ratios, and as Jason said, it is a good idea to look at EGT as well.
My methods are based on 13 years of TESTING with the NGS scan tool or WDS (Worldwide Diagnostic System), using the DATA at WOT on the DYNO. These are FORD pieces you will never have ACCESS TO at an independent shop. It will provide all the OBD II EEC V parameter data and testing needed to verify an upgrade is required.
Granted, SOME aftermarket scan tools will display these PIDs, but not many. Your best bet is the Snap On piece, but it is NOT cheap. There are many out there, so when shopping for a scan tool, you need FORD specific programming so you can select ALL required PIDs to get the information you need to make the call.
A/F Ratio.
Injector PW.
Fuel Pump PW.
Fuel Pressure.
EGT.
LOAD (In %)
IAT
MAF (Voltage and flow rate)
AT THE LEAST.
And I want to see the PIDs in GRAPH form so I can superimpose the curves and distinguish the problem child. A table is useless for making comparisons in my opinion. It leave it up to you to make the proper correlations between the individual PIDs.
Granted, SOME aftermarket scan tools will display these PIDs, but not many. Your best bet is the Snap On piece, but it is NOT cheap. There are many out there, so when shopping for a scan tool, you need FORD specific programming so you can select ALL required PIDs to get the information you need to make the call.
A/F Ratio.
Injector PW.
Fuel Pump PW.
Fuel Pressure.
EGT.
LOAD (In %)
IAT
MAF (Voltage and flow rate)
AT THE LEAST.
And I want to see the PIDs in GRAPH form so I can superimpose the curves and distinguish the problem child. A table is useless for making comparisons in my opinion. It leave it up to you to make the proper correlations between the individual PIDs.
Before you ruin this thread and any others I post in with your rebuttal about how smart you are and how certified you are and how many cops you've beaten up. Just send me a private message. I wont throw names out but I've received private messages from a number people who are annoyed at your 4.6 2v 5 speed BS that doesn't have anything at all to do with the topic or the truck in question.
