I’ve heard of an upgrade to the red top sr’s cam oil squirters using ones from a s14 or s15 blacktop?. Anyone else hear of this?
just get a tomei oil pump…u will make 90-100 psi of oil pressure at 2000 rpm with no load…far better choice to avoid starvation then the squirters…i had one on my sil80 and it does wonders…
Excessive Oil Pressure will cause problems.
And Oil pumps don’t create pressure, they move oil. Until there is a restriction in the system pressure cannot build. Bearing clearance, oil viscosity, temperature and, the oil pump pressure relief spring all contribute to the overall/observed Oil Pressure.
Oil Pressure can always read fine @ the Sensor but their could be a problem else where down the line allowing the chance for sections to run dry. I read alot about people having low oil pressure and just wanting to change to a thicker oil in hopes of increase the pressure and fixing the problem (which is not a good thing to do). Simply replacing the Pump and Pickup could do wonders, but if you have a plugged up system or “Squirter” for example then increasing the pressure may not be the best thing to do.
And you shouldnt even see 100psi @ redline let allow 2000rpm without load and even if you could reach 100psi @ 2000rpm I would hate to see how much pressure was built by redline because the seals in the engine would never be able to handle that much pressure in the long run.
I like this, very technical so I’ll chime in on this…
I would agree to the issue that too much pressure is no good but theres more to pressure than just the matter of an oil pump.
Engines run on journal (hydro-dynamic) bearings. Journal bearings rely on pressurized oil to keep them lubricated. The dimension between a rotating shaft and the stationary bearing is called bearing clearance. Bearing clearance is determined by factors such as shaft speeds, shaft size, operating temperature, shaft material, bearing material and type/viscosity of lubricant used. In forced pressurized lubrication where the pressure stays at a relatively constant level the oil will seep into the clearance space lubricating the shaft and actually supporting it; thus the term hydro-dynamics.
Now it doesn’t take Borat to figure out that if you decrease the O/P the rotating shaft would come into contact of the bearing, heating it up, this and that and bad things happen. However if you increase the O/P WITHOUT increasing bearing clearance (more on this later) what happends is the oil will actually put a lot of resistant around the rotating shaft and induses viscosity break down; think of the oil film around the shaft like a giant band clamp.
Proof in point that higher O/P cars have higher oil clearances, SR20VE-N1 has a 120 PSI oil pump. SR20DET (53J) has I think a pump that does only 60-80 or so PSI. But the N1 bearins/pistons have more clearances if memory serves me right.
Also oil seals don’t get blown out due to high oil pressure. Oil seals get blown out due to pressure (gaseous) being built up INSIDE the crank case. If you have pressurized liquid inside a closed chamber with a rotating shaft sticking out (like a pump) then you’d use what’s called a mechanical seal, but thats completely off topic.