On another forum, someone mentioned several people that had experienced problems with the Accusump units. I spent an hour reading what I could find today. Some here might be interested...
A few guys were having problems with the pop-off valve allowing oil to spew out in normal driving situations. It seems that someone (I think it may have actually been Danny Popp) determined that this was happening because the cylinder was losing its residual pressure when the engine was off. When the engine was started, there was a sudden inflow of oil pressure. With no air behind the piston, there was no 'cushion' effect to soften the impact of the fresh pressure, and it would cause the blow off valve to open. Seem that the air on the back side of the piston acts like a 'shock absorber' when there is a sudden pressure influx.
Makes sense to me.
But it seems the reason for losing the pressure was the important thing. A couple of guys reported problems with the internals of the air pressure gauge used on the units. So once I have my system active and charged, I will definitely check the pressure after the car sits to ensure that I'm not losing any pressure somehow...
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