STR-8 oiling system

[Buick Guy]

Keep in mind, that all of the oil from the pump has to go through the filter, as there is a solid steel plug between the two fittings. You could [if there was room] put in a tee in the bottom hose and some sort of adjustable pressure valve and route it back into the oil galley. For our use, we decided to keep it simple and keep the oil pressure below about 70 lbs. We only run 5 miles at a time, and with 8 quarts of oil it hardly gets warm.
About the kinked hose, I just moved it to the side for the picture. It's just the road draft tube.[crankcase vent] Doug

[saltracer]

Jryki,
Anybody contemplating this filter system. Keep in mind that "ALL" let me repeat:"ALL" of the oil has to go through the filter. If you rev the engine when the oil is cold and of hihg viscosity, you will balloon the filter or worse, blow the filter off of the car. You will show oil pressure until all of the oil has exited the breech. You will have mere seconds to save the engine. There isn't a bypass valve on this setup. Just a warning. Doug

should be a bypass built into the pump, we flow tested the pump and set the bypass spring at 40 lbs. also put an oling bar inside the valve cover in order to flood the valve springs (for cooling the springs)

[Buick Guy]

Should set the internal pump bypass to put out 10 lbs /1000 RPM. For performance applications.

[Jyrki]

Thanks for the detailed pics, Doug!
As for the bypass valve under the filter on newer engines, it's function is to provide the engine the necessary oil flow should the filter become clogged. The pump bypass prevents the pump itself from breaking, but if the filter becomes severely clogged, nothing will prevent engine damage. Then again, I wonder what could cause the filter become clogged so rapidly you didn't have time to react?

Also another point there. As the whole oil volume runs thru the filter, the hoses or tubes must be large enough to support that volume.

[Jyrki]

Saltracer, are you running any kind of valve seals? Umbrella or positive type?

[saltracer]

Saltracer, are you running any kind of valve seals? Umbrella or positive type?

Yes , we run "positive" type..................we really made a big-ass deal of that oiling bar.........think maybe we had too much time on our hands. First, we made a plexaglass valve cover so that we could see how this was going to work , ie. size of holes and indexing them so them covered the valve springs............ended up with a 3/8 tube with .050" slots cut in it, them rotated it to were it flooded the springs, not sure if it was needed at all but wanted also to protect those high-dollar roller rockers..............but thats "HOT RODDING"

[Jyrki]

Slightly offtopic, but since you mentioned roller rockers, I would like to hear more (we had a discussion on them elsewhere). A while ago I looked at my friend's BB Mopar roller rockers and thought they might be adapted...

[Jenz38]

Hi Together,
Now i have fired up my new 263er with fullfload Oilfiltering.
The block have a Plug in and all go from the Pump thru a Extratube to
the Original Filter. I have used bigger 5mm(3/16") ID Tubes everywere also for the
Headoiling and drill up the Fittings to 5 mm.
I have a Pressure from nearly 10 psi or less in Idle,if i accelerate its not go higher,it goes down ...
I have a 6mm Washer under the Backpressurespring in the new Oilpump.
Drive a 15 W 40 and the Oilpressuregauge is OK.

Any experiences ?
The Tubes are to big?
Now I will increase the Oilpumpspringpressure more,what do you Guys mean?
I think the Oilpressuregauge is OK.
Thank ahead

[Jenz38]

Ok,I open the Oilpan,have checked the Pump,all is perfect, and increase again the Springpressure.
Now the pressure in idle is 15 psi ,I have checked it with an extra Gauge in the Maingallerie,but not goes up while exelerating..
The Reason is the too big Oiltubes and Fittings in the Block,the Oilflow is too high,
not enough Backpressure.Today i will try new Fittings with smaller (original) ID.
Especially the Tube that go up from the Gallerie to the Head.

[raycow]

Are those pressure measurements taken at the inlet side of the filter or the outlet side?

Ray