Anyone got > 1 oil filter? (With a dry sump setup)

[peterpsg]

I'm installing all my new oil plumbing bits and I started to think, maybe I could filter the oil straight out of the dry sump pump so I could keep any little bits of crud out of the oil cooler, as well as leaving the normal filter attached to catch anything comming out of the pressure side of the pump...?

Has anyone tried this? Or used one of those 'double headed' remote filter arrangements?

I figure the pump should be ok with this, as the scavenge stage will pump thru the first filter, while the pressure stage will pump thru the normal filter, so sort of splitting the extra load...

It'll also help keep the pressure stage as simple as possible, while still keeping a filter in the circuit and the cooler gets the oil when it's at it's hotest...

Any constructive comments welcome!!!

Cheers,
Pete

[bigmack]

I don't have drysump, but I have a remote canton oil filter mounted before my oil cooler.

[gtrclive]

You should have Mesh filters in the scavenge ports of the sump ?? to save the Pump from large particles.... You can also get inline filter for the return lines but they are not Paper type there just another finer mesh filter.

[B1 ECC]

My system is; based on on best advice, from the sump pan two mesh scavenge filters, into the tank, out of the tank into the pump, into the inlne filter, out of the filter into the cooler, out of the cooler via the temp sender into the engine. The theory is the pump( albeit expensive, is expendable over the cost of the engine) pumps a lot better than it sucks hence the name " pump" !
I use a Canton filter which I assume is similar to Mack's !

>> Edited by B1 ECC on Thursday 30th March 22:49

[peterpsg]

Ian, I had something quite similar to your setup in mind...

The only differance is that the guys at Pace recomended that I stick the heat exchanger right after the scavenge outputs - so before the tank - that way the heat is dealt with asap.

It's also why I thought of running 2 filters, one before the heat exchanger, but I guess if the use of mesh screens is good enough for the pump, it'll be good enough for the heat exchanger as well.

Also that way, the only things in the pressure line before the oil goes back into the engine are the remote oil filter (Canton Super Filter) & oil temp sender unit, another plus according to the guys at Pace.

[Rubi]

peterpsg said:

The only differance is that the guys at Pace recomended that I stick the heat exchanger right after the scavenge outputs - so before the tank - that way the heat is dealt with asap.

I was always told (I think Carroll Smith commited it to print) that it was best to cool the oil after the pressure pump because it contains no air (hopefully). The scavenge oil is heavily aeriated which means that you need a far larger oil cooler as you will be cooling a lot of hot air as well as the oil.

If you look at total length of the scavenge pump stages on the oil pump you will see that they are about 50% greater than the pressure stage - that extra capacity is for air / crankcase fumes; it follows then, that your oil cooler needs to be 50% larger in size if you cool scavenge oil.

[B1 ECC]

Rubi said:

peterpsg said: The only differance is that the guys at Pace recomended that I stick the heat exchanger right after the scavenge outputs - so before the tank - that way the heat is dealt with asap. I was always told (I think Carroll Smith commited it to print) that it was best to cool the oil after the pressure pump because it contains no air (hopefully). The scavenge oil is heavily aeriated which means that you need a far larger oil cooler as you will be cooling a lot of hot air as well as the oil. If you look at total length of the scavenge pump stages on the oil pump you will see that they are about 50% greater than the pressure stage - that extra capacity is for air / crankcase fumes; it follows then, that your oil cooler needs to be 50% larger in size if you cool scavenge oil.

Peter, I can't comment on the Pace recommendation, but out of interest i've just recieved an oilstat from Mocal, the instructions show two installations and both show the cooler on the pressure side after the inline filter. Hope this helps?

[peterpsg]

Hi Ian,

I just got off the line with one of my suppliers, who also works on racing engines and they recommended that the oil cooler is on the pressure side, just before the return to the engine, because the oil is still hot, and thus easier to pump to that point.

If you cool it too early, then it's harder for the pressure side of the pump to pull it out of the tank, so the current arrangement is the best in that regard.

So I'll mount the cooler after the filter after the pressure stage outlet, that way the hotter oil will flow more easily thru the filter, and it also helps keep crud out of the cooler channels...

Well I will when I finally get all the adaptors !!!! Damn fittings...

Cheers,
Pete

[craig-ultima]

Interesting, the advice I got (from multiple sources) was to keep as much stuff out of the way between the pump and the engine to keep the pressure up.

This sounds like one of those "mass debate" issues.