Originally Posted By: mr_diy
Originally Posted By: mr_diy
How can there be negative DP values?
Is it possible your bypass filter is affecting the measurements?
I would think the filter's bypass should cap the DP at the full open PSI value?
Regarding negative DP, it may be that rapidly increasing pressure along with time differences between the sensors ( sensor 2 after sensor1) would explain this.
Maybe I misread your setup having a second bypass filter.
Honda and Toyota may know what they are doing with their OEM filters.
So with these preliminary results you are prepared to make the leap that relatively inefficient filters, ie. ~55-65% @ 20um, is the answer to the brief and relatively infrequent bypass events. Otoh, perhaps the other OEM filters including Motorcraft, AC Delco and Chrysler would say not so much.
Originally Posted By: mr_diy
How can there be negative DP values?
Is it possible your bypass filter is affecting the measurements?
I would think the filter's bypass should cap the DP at the full open PSI value?
Regarding negative DP, it may be that rapidly increasing pressure along with time differences between the sensors ( sensor 2 after sensor1) would explain this.
Maybe I misread your setup having a second bypass filter.
Honda and Toyota may know what they are doing with their OEM filters.
So with these preliminary results you are prepared to make the leap that relatively inefficient filters, ie. ~55-65% @ 20um, is the answer to the brief and relatively infrequent bypass events. Otoh, perhaps the other OEM filters including Motorcraft, AC Delco and Chrysler would say not so much.