Oil filter location

kyhunting · kyhunting's Garage

Dry sump application. Does it matter which side of the engine the oil filter is connected? I need to relocate the oil filter from the left side (oil is pushed). To the right side (oil is sucked in under the engine oil cooler).

stownsen914 · 03-23-2010, 10:54 AM

Hi,

Are you asking whether to filter on the scavenge side vs. the pressure side of the oil system? The early 911 stock setup is on the scavenge side (between the engine and the oil tank). Porsche usually filtered its 911 race motors on the pressure side by replacing the stock oil cooler on the engine with a filter. I believe the 993 filter also went in this location. Note that the pressure side filtering is after the oil pump, so under pressure.

Your post led me to believe that you were considering putting a filter between the oil tank and the engine (suction side of the oil pump). You probably realize this already, but it would be REALLY bad to put a filter there. It would likely lead to oil starvation and all the mess that comes with it.

Scott

DUK · 03-23-2010, 02:40 PM

Dry sump racecar systems really need two filters. One on the scavenge side return and one on the pressure side after the pump. Just keep this in mind and as stated above, never in the suction (supply) side.

Eagledriver · 03-27-2010, 07:48 PM

There is no way to install a filter between the pressure pump and the engine. The pump is inside the engine! You cannot filter between the tank and engine pressure pump intake because you will have an unacceptable chance of oil starvation. The only pressure on the oil would be from the air in the tank (14 PSI with a perfect vacuum on the pump intake). The best you could do is use a screen to filter you the big pieces. Even then it should be a big screen and can't be very fine mesh.

-Andy

jcge · 01:27 PM

Quote:

Originally Posted by Eagledriver

There is no way to install a filter between the pressure pump and the engine. The pump is inside the engine!

I believe the 993 oil filter console (993.107.057.00 Bracket) replaces the engine mounted cooler, and effectively installs a filter between the pressure pump and engine. You would then need supplementary oil cooling (eg front mounted), as you'd have removed the engine mounted cooler.

John

Eagledriver · 03-28-2010, 06:37 PM

That's a very cool set-up. I stand corrected.

-Andy

911 tweaks · 03-30-2010, 04:02 PM

jcge (john) can you explain this set up more...that sounds like the ticket to filter before the oil enters the engine, right?
Does the exposed/open oil hole on the case at the bottom of the picture need an oil line? or plug? or what to complete this set up...cool (no pun intended)
Thx,
Bob

jcge · 03-30-2010, 05:51 PM

That hole is the oil (suction) feed from the tank to the pressure pump - so you definitely need to connect it !! The smaller threaded hole beside it is the 4th stud hole for mounting the engine oil cooler. This 993 filter bracket uses only 3 of the 4 mounting studs.

In pre 993/964 engines - it would have a rubber seal ring installed sandwiched between the engine mounted cooler and crankcase.

Dont forget that you will need some supplementary cooling as you must remove the engine mounted cooler to install this filter housing.

John

911 tweaks · 03-31-2010, 03:11 AM

I guess I will follow how sm^rt ra^ing plumbs up their set up, right?? OR, is there an easier way...I also plan to run elephant finned lines & a wide mouth front cooler...?
Using this 993 filter plate/set up I can kill 2 birds at the same time...filter the oil before it goes into the system & possibly move the oil tank to the front & use front oil cooler set up...

Thx, Bob