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Here is some information taken from Super Ford Magazine July '96 pg. 38.
Meter/CFM @ 28.38 in/H20
SVO 70mm plastic ...842.3
Pro-M 75mm ...768.1*
C&L/Vortech 73mm ...746.3*
SVO 70mm Cobra ...523.7**
Pro-M 77mm ...471.4
Mustang 58mm ...296.8
* is applications for the T-Bird and Cougar.
** same as stock
Due to testing conditions, it would not be fair to list the horsepower and torque ratings. For example, the Kenne-Bell comes
with a chip and a K&N filter and therefore made the most power. The SVO Cobra comes with new injectors and a recalibrated EEC-IV. Surprise, the SVO plastic 70mm unit made the most power as a stand alone air meter/sensor.
The C&L 73mm was 6 horsepower down from the Pro-M 75mm unit. Again, the engine was modified (5.0L) and results could vary. The Pro-M is the second most accurate air meter on the market (behind SVO) and retails for $250. It is highly accurate becuase of its electronic calibrations in the sensor itself.
The C&L 73mm unit tricks the EEC-V into thinking the engine is under a lighter load than it really is. The computer then advances the timing and runs the A/F ratio slightly leaner. This is why the Pro-M is a better meter.
The C&L 73mm unit can be purchased for $189.00 and utilizes the stock
sensor, so a calibration is not necessary. The pn for your application is CL1257919. If you need to upgrade to a larger injector, the C&L requires only a sampling tube change ($5.00).
You just can't beat the electronic tuning when it comes to the MAF. I
would try to purchase a used C&L 73mm unit (they are
universal in applications) provided it is calibrated for 19 lb./hr.
injectors. Then if you plan on some extensive modifications (ie
blower, heads, etc.) go with the Pro-M unit.
Either way, I don't approve of the boring of the stock 70mm unit and
re-drilling the sampling tube. Some people have had good results with it, but it tends to run the A/F ratios slightly rich.
A-Train
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