MAF

[Greg Hermann]

>In a message dated 98-11-03 00:04:55 EST, soren at rio.com writes:
>
>>>170 Gm/sec works out to 300 cfm (and about 205 HP) (at sea level), which
>>>works out to 84% or so VE--on the low side, which indicates a lot of
>>>restriction from the MAF!  If the thing only has a 25 mm diameter throat,
>>>your MAP at WOT can only get up to about 12.0 or 12.5 psia. (Basically ,
>>>the MAF is throttling the engine!)
>
>
>
>It's EZ to check if the MAF is a restriction, just tap in a vacuume guage on
>the engine side of the MAF.  The vac reading at WOT and high RPM would
>indicate a restriction from that point towards atmosphere.   Next tap the
>guage between the MAF and throttle body, throttle body and air filter, air
>filter and duct leading to the real world.
>
>Harold

Just be sure to use a gauge which has enough range and is accurate--better
yet use a manometer. Dwyer is a good name for this sort of gauge. Far
better to use a DIFFERENTIAL pressure gauge--and hook it up to both sides
of the particular part in question! A regular vacuum gauge is next to
useless for this sort of thing on any kind of a scientific basis.

Regards, Greg