Does descreening your MAF have a negatine affect on the line pressure of your tranny. If so hoW

 

If you port it you can effect the shifting of the trans...

descreened....I think not.

 

descreen will not effect it.. your not chaniging the unmetered air flow area

 

How would the screen, or lack thereof, affect the tranny performance ?


And, would this apply to aftermarket MAF ends as well ?



Thanks !!


Britt

 

MAF meter accuracy depends on two things (assumptions):
- the airflow is uniform
- the fraction of the airflow cooling the sense resistors
is still as-calibrated fraction of the total airflow.

MAF ends or porting make the cross-section larger, and
invalidate the calibration (more air than reported).
Taken the other way, the air -demand- is under-reported,
and the transmission control believes it needs less line
pressure to hold the clutches down than maybe it
really does. Clutch slip => clutch wear.

Like many compromises, this one has its roots in fuel
economy; less pump pressure = less engine output
spent in pumping = less gas burnt. Whoopee, saved
a teaspoon on that trip to the grocery.

The screen serves to make airflow uniform. Airflow
bias toward one side of the MAF may also mess up the
accuracy of the reading. Most seem to consider this
a not-very-significant problem. However, if descreening
improves your low- and mid-RPM performance, it's doing
so by misreporting your airflow, (leaning out your mixture
and increasing power per throttle angle), not by increasing
airflow (or decreasing pressure drop, however you care to
look at it). The screen is a small enough airflow resistance
that it pretty much doesn't matter, except WOT.