[Shotimes] MAF connector question

[Paul Nimz]

Saw a Muskrat GT with a S/C on the dyno.  His HP was 395 and the MAF was
maxed out.  They figured on 430 or so if they could get the 90mm MAF.

Paul Nimz
'97 TR
'93 EG mtx


----- Original Message ----- 
From: "Mark Nunnally" <manunnal@netheaven.com>
To: <shotimes@autox.team.net>
Sent: Thursday, August 14, 2003 11:31 PM
Subject: Re: [Shotimes] MAF connector question


> 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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