Need help 427 low oil pressure ?

[patrickt]

Originally Posted by priobe

Is anything installed in place of the oil relief valve?



In your quote it states "the relief valve in the back of the block will operate at typically 55-65 psi".If the valve is installed then those of us with the relief valve installed will only have 55- 60 psi of oil pressure regardless of what we do to the pump.

I think when people say they "don't use the block valve" that implies they blocked it off even when they don't actually write that explicitly. There has been more discussion on what sort of thread to use to block it off rather than to block it off or leave it open (meaning people either used the valve or blocked it off). One post mentioned that the plug needed had an English Wentworth thread that was close to a 5/16 18 size. Supposedly a pipe plug could cause more problems than it fixed. As to the PSI, the forum threads have the block relief as being calibrated for 60-80 PSI, you adjust the plug position to change the value, and the lowest pressure will be at the relief valve when it's open with the areas before the valve having a higher pressure. Again, this is from years of FordFE forum discussions. A call to George G. would get a definitive answer on pressure theory. If it were me building the engine, I'd have George ship me a new valve and I'd put it in the block. But there is no shortage of folks who have just blocked it off entirely.