Mark's comments are true to my experience.
When my stroker engine was built in '05 I had a high-volume Melling oil pump
installed to protect my SCAT balanced rotating assembly and other high dollar
parts.
But on start-up the pressure guage was only indicating 45psi cold and 20psi hot
at idle.
8,000 miles and 5 years later, I had the engine removed and blueprinted to
correct some other problems, and from advice on this list I had the hi-vo oil
pump replaced with a Melling stock pump. On the dyno the engine was now
indicating 70+psi on start-up and over 75 at redline.
The engine is now back in the car, and this morning on start-up on the in-dash
guage it was reading........yes - 45psi. So there is obviously something wrong
with the guage or something else in the oiling system.
For ex: on the dyno we did not hook up the remote filter system, but instead
installed a large filter directly to the block.
I will first try by-passing the remote filter, and if there is no change, I
will try another guage. Other than that, I am stumped.
BTW, on disassembly and dimemsion checking, the crank, rod and main bearings
were well within "new" tolerance, and looked perfect. This after approx 8,000
miles of running on what I thought was low oil pressure.
I will appreciate any comments or observations...
Tks
Dave
.
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