Quote:
|
Originally Posted by drdd
the manufacturer's packaging states that the Average Air Flow (based on 100 psi inlet pressure with 5 psi drop) is 24.8 SCFM. It is a 5 Micron filter (meaning it's designed to filter particles of 5 microns or bigger) and the body material is zinc.
I do not know what the SCFM is for our PVC systems. how can it be measured?
can psi be converted to SCFM or ACFM ?
|
PSI is a measure of pressure. ACFM and SCFM are measurements of flow. There is no"conversion" factor to equate pressure to flow.
The PCV flow rate of a seasoned 4.3L is in the range of 8-10 ACFM (approx 6-8 SCFM).
24.8 SCFM( at 100 psi) = 3.2 ACFM. If this filter really has 5 psi pressure drop at 3.2 ACFM then it is too restrictive for use as described in this thread.
Those who leave this filter installed can do a reality check by monitoring the oil deposits in the PCV inlet breather line (fresh air inlet hose from air filter to valve cover) and deposits on the throttle butterfly. As flow is restricted in the PCV valve line, blowby will be forced to flow out the inlet and will then be mixed with intake air.
Use a Q-TIP to swab the inside of the inlet breather line. Oily residue would only be there if you are flowing backwards.