So starting the journey of tuning my car.
The car is a 2001 Cobra.
It is a 5.1L stroker 4V with 11-1 compression fresh build.
Heads have slight bowl work and freshly redone, Upgraded Valve Springs and Comp CCA-106260 cams degreed to CAM card.
Intake manifold is stock 2001. JLT intake Lightning MAF
Exhaust consists of BBK Longtubes and off-road h-pipe.
Fuel System is new 39lb injectors and factory everything else ( i do have an upgrade fuel pump to add in but have not installed yet as I am contemplating forced induction and know I will need a revamped setup)
I am working with an unknown Procharger tune on a 2001 Cobra PCM (my PCM got bricked by a dealer, while trying to reflash PCM and PATS).
So far I have updated Fuel Injector Data and a Base MAF profile
Fuel System:
Utilized data from Ford Racing 39Lb injectors.
InjectorData.PNG
I took all data and added to what I think is appropriate area and re normalized data to match on tables.
For example I took
ALOSL (lb/s) -("low" injector slope) of 0.011404 = Flow Rate Low ([ECM] 12010 - Injector Flow Rate Low: Injector Flow Rate for low commanded fuel mass values.)
Additionally I took FNPW_LSCOMP (Multiplier to low slope as function of injection pressure in psid) and re-normalized it to HPT Flow Rate Low Multi vs Pressure FNPW_LSCOMP.PNGHPTFLOWMULTI.PNG
Is this the correct way?
Additionally, since this is a Procharger tune I am assuming some of the fuel pump voltages will be off but I do not have access to factory information at this time. Though I did check it doesn't appear it is setup for a return setup as the voltages are not maxed.
How critical are fuel pump voltages and tuning for this? Any links to tuning this appropriately?
For MAF
I used decipha's MAF Transfer Curves to pull the data on the 90mm Lightnight MAF
http://www.efidynotuning.com/maf.htm
I figured this could be a good starting point to adjust from.
MAFTransfer.PNG
Re-normalized to match data converted Voltage to ADC by multiple voltage by 204.6
HPTMAFVolt.PNG
Any issues with this method?
Also on the Engine>General>Displacement I have updated this to .00167lb since I am utilizing a stroker motor.
Idle was increased to 850rpm since it has aftermarket cams.
Car will startup and idle though startup requires some throttle to get it to run once it is running it idles and runs decent.
My plan is to dial in MAF, by forcing open loop Engine>Fuel>Oxygen Sensors>CL 02 Sensor Temp - 2500?F.
I will datalog the following: MAF ADC, EQ Cmd, WB02 EQ.
And adjust MAF by ADC and the variance between WB02 EQ & EQ Cmd.
Any other tips or thoughts? I will post current file and current stabilized datalog in next post as I work on it.
Additionally, this car is seeing gauge drops while data-logging so I will be troubleshooting that as well. to see if anything specific is driving the issue.