Accusump - some data

[The Radium King]

so, one of the things i am getting is the pressure drop across the filter. it seems high. i note that lne changed the filter they specify. i'd done a bit of research into filter elements - oem is 30 micron but a very large filter element AND has a bypass (not sure what pressure it bypasses at). the napa 1042 is 23 micron AND the element is much smaller in area and no bypass, so strikes me as a bottleneck in the system, and probably why lne went to their latest washable filter with a 60 micron size (they chose less filteration for better flow for a reason i think).

i think the accusump pressure switch is at the accusump, so should track the pre-filter oil pressure closely, yes? so, thinking that the 40 psi switch was spec'd based on a filter that flows better, and with the current config you should consider a higher pressure (55 psi?) switch to be more responsive or, as yu are finding, run without the switch and just let the accusump swing - did you get any indicators that the accusump was depleting itself after a long sweeper or turn complex? otherwise, i think more and more that a remote filter mount with full-size filter is the way to go.

[AZ986S]

Hey RK,

A couple comments:

- I'm using a remote oil filter with the Canton Racing racing filter. It is supposed to flow 15 gpm and is full flow.
- If you look at the data I posted a while back comparing the Canton and the 1042 filters, there was not much difference between the 2 for pressure drop. So that was interesting.
- The Accusump (and pressure switch) is located post oil filter so it sees approx. a 10 psi drop compared to the pump pressure pre-filter (sometimes more under load).

- So if you look at the PCA 3rd session, the Min pump pressure was 52 psi. That would mean about 42 psi at the pressure switch, which is not low enough (35 psi) to open the Accusump. That's why it did not open during the entire session. Why? Not sure, but maybe the fresh oil made a difference, and also the increased air pre-load could be a part of it as well, contributing to an increase in oil sump level. If you look at the NASA session 3rd data, the Accusump opened 16 times during those 3 laps...
- No I did not see any evidence of oil depletion that would be shown by a substantial air pressure drop in the Accusump. It did not go below 51 psi, indicating about 2/3 of a quart remaining at worse.
- I think that if you're going to put an Accusump, you need a check valve AND/OR an oil filter that has an anti-drainback valve. With the racing filter, it does not have one, but my system does have a check valve to reduce back flow to the pump.