Originally Posted by crashnscar
When your clutch slips, engine speed increases. Why do you think that a slipping clutch would cause your oil pressure to drop? Oil pressure generally increases with engine speed.
The rpm increased a little, but the clutch didn't let go like it did while at the track.
I figured the oil pressure dropped because the load on the engine decreased. If that doesn't make sense, then I guess I may be lucky that I haven't blown up my engine due to knock.
Ok, after doing a bit of research and thinking. This idea is stupid. The pump is connected to the crank which should flow the same volume at whatever rpm no matter the load.
I should be able to check. I have a scope that is used to check inside the bladder by going thru the urethra. (ouch) I should be able to shine a light down there and look for any detonation damage.
however, this happened last time and I immediately pulled the plugs to look for signs of det. Clean plugs, and the appropriate color. No signs of being lean. Of course I was unable to check the piston tops.
What does det feel like when it happens under boost? Loss of power?
EDIT: Could the oil pressure drop and rise fluctuation be due to the oil bypass spring. Opens (pressure reduces, closes and pressure increases, continue cycle)
I'm left thinking that maybe the oil pressure fluctuation is not a symptom of my clutch problem. I was going up a pretty steep incline, and I did not compensate engine oil volume for the turbo and lines. Maybe the pickup was really running out of oil due to the uphill angle, possible shortage of oil, and acceleration.
I'll test the detonation theory by pulling a few degrees of timing. That will be easy enough.