Kelly,

I'm not sure but I seem to remember that some take out that oil pressure regulator, put it in a press and squish it some (end to end) which compresses the spring accordingly - which results in more oil pressure. I guess it takes longer for the spring  to open. I'm unsure how this all works perhaps someone can explain it better, then I will understand it better.

Perhaps this is a way to compensate for a weakened spring and low oil pressure?

George ( down under)

The street racers install a few washers under the spring so that the plunger cannot move.

This is to assure that the rear regulator is controlling oil pressure When a 110 PSI regulator is installed. The housings for the 93-95 turbo engines that use that 110 PSI regulator, do not have the front case to iron "O" ring, but a steel gasket.

 

All of this is to protect the cooler on cold start up or those who feel reving the engine right after start up will warm it quickly.

 

Lynn E. Hanover