You should understand what makes pressure in your engine first before you go installing a high volume pump in it. A high volume pump, is just that, A HIGH VOLUME PUMP! This DOES NOT mean you will always get a higher oil pressure.
An oil pump is a positive displacement pump, meaning that it only moves a certain amount of oil from one place to another. AN OIL PUMP DOES NOT CREATE OIL PRESSURE! Oil is incompressable, it is a fluid.( Air is compressable ) The ONLY thing that creates oil pressure- is the resistance in the oiling system! The oil passages, oil galleries, BEARING CLEARENCES (very important!), Bends in the oil lines and the oil filter. When the oil pressure gets too high, a releif valve, held back by a spring, releives some of the pressure caused by the " resistance", in the system.
So, with all that being said, YES- it is most likely the spring is stuck on your releif valve--however--if the spring is too stiff this could cause your problem also. What caused the sticking spring? Do not take this the wrong way, and I do not want to panic you, but if the spring is not the answer then the bearing clearences are too tight, or the oil passages are clogged or something like that.
As an engines' bearing clearence gets old and loosens up, the oil pressure (or resistance) goes down. If the oil passages are clogging up, the pressure ( or resistance) goes up. High oil pressure is just as bad or worse than low oil pressure.
BTW-- the rule of thumb is 10psi of oil pressure for every 1000 rpm's. Street motors rarely ever get above 5500 to 6000 rpms. So 60 psi is way more enough pressure. The nascar motors at Daytona run between 60 and 70 psi because of there tight clearences. These motors are trash after 700 miles or so. Also BTW, run 10w30 fully synthetic oil. Oil must flow. Oh that's another subject>>> Good luck and I hope this helped you. Let me know how you make out and what you find.
Saturday, November 24th, 2007 AT 6:03 PM