[Shotimes] MAF connector question

[Mark Nunnally]

Sure.  Get you a snEEC real time data logger and you can watch everything in
real-time :)  (or record and playback later)

If you like to tinker around, it's actually a great tool, and also great for
finding bad/wierd acting sensors.

Dunno what curve your C&L is set up for, but if it's for 850 kg/hr, I don't
care if it's 300 mm it'll peg and be worthless to the EEC.  Basically the
MAF chart in the EEC and the associating MAF curve limit is the "wall" you
must clear, has nothing to do with MAF size, injector size, etc.

mark

----- Original Message -----
From: "Jonathan Zane KC2ENA" <jonzane@kc2ena.com>
To: "'Mark Nunnally'" <manunnal@netheaven.com>; <shotimes@autox.team.net>
Sent: Friday, August 15, 2003 3:12 PM
Subject: RE: [Shotimes] MAF connector question


> Interesting information.  Just what I'm looking for.  I am getting a MAF
> Overflow message from my Speedbrain on the Stang, but I never really knew
> why.  I'll have to process this more.  C&L swears my MAF is good to 500hp
> though.  Hmmmmmm.  Can this voltage be measures directly off of the MAF
like
> most other sensors?
>
> Jonathan Zane
>
>
>
> > -----Original Message-----
> > [mailto:shotimes-admin@autox.team.net] On Behalf Of 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
> > _______________________________________________
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> >
>
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