Hello, HPTuners, first-time member here. Nice to see a supportive community like this.
I have recently built a new engine for my 2004 Mustang GT. Nothing exotic, as this is
a daily driver for 9 months of the year. My focus has been handling, performance and
fuel economy.
The new engine is a 4.6 2v, same as the factory, but with an aluminum block and
a few upgrades. I'm using the original PCM, which is EEC-V, and i'm using O2 sensors with cats.
The upgrades are:
1. Mildly ported heads (casting flash removed on the long-side radius, and gasket matched)
2. Gasket-matched intake manifold
3. Stage 1 cams (226/230 @.050)
4. 24lb Ford injectors (the original engine had 21lb injectors)
5. Long-tube headers and full 2-1/2" exhaust (factory is 2-1/4")
6. 75mm throttle body and plenum (original is 65mm)
7. 10.5:1 compression (original engine was 9.7:1)
At the moment, the PCM is running a "Diablosport" 91 octane "tune". The car runs very rich
at idle and WOT, according to the wideband (Innovate LM 2) and my nose. I typically see
0.71 lambda in WOT pulls to 4,000rpm (the engine now has 1700km, so probably past
"break-in").
I have a brand-new MPVI2+, and i've been sifting through the forums for relevant
information... so (deeep breath) it's time to start tuning. I have the injector specs from
Ford, does it make sense to change the high and low flow rate, breakpoint and pulse width
minimum to the Ford specs for the 24lb injectors? Or is there something obvious i should
do first?
Thanks for taking a look... regards, kevin