[Shotimes] MAF connector question

[Mark Nunnally]

The size of the MAF doesn't have as much to do with the ultimate power you
are trying to reach as much as the voltage/air flow curve.

The stock MAF curve for the SHO and 5.0L mustang is an 850 kg/hr curve.  You
can have a 100 mm MAF, and if it's set up for a 850 kg/hr curve and you try
to make 500 hp, you'll peg the meter.  Once the EEC hits the cap of voltage,
good-bye tuning in terms of fine adjustments, fuel trim, etc.

You say a 77mm MAF is over-kill?  Well with a stock SHO 850 kg/hr curve on
that MAF (ProM 77mm), I hit 4.4 peak volt on my factory 3.2L. (260 crank
hp).  That's pretty close to the max voltage, so to get to 300 hp or so
you'd need to dump the 4.7 volt - 850 kg/hr limit, and re-tune it to 1000+
kg/hr at 4.7 volt or so, and change the EEC chart to match.

This is why Josh and some of the other blower guys have gone to the 80/90mm
Lightning MAF's (have like a 1700 kg/hr peak IIRC) AND changed the map in
the EEC to match (ie, going way above the 850 kg/hr limit).  I think some of
the aftermarket MAF's dont' achieve 1 volt at idle, where the Ford units
typically do (easier to tune).  Josh is making 465 hp measured at the
wheels, and is getting about 4.5 peak volt (close to the limit) on his 80mm
lighnting MAF (I think it's on a 1600 or 1800 kg/hr peak)

Although I don't follow the blower discussions real close, I seem to recall
the Ford 80mm runs about 1100 kg/hr, and pegs out around 400 hp.

mark