I need to pull out my build sheet and get the exact clearance as I forgot the number. I seem to recall it was 0.0005" to 0.001" over the factor specified range.
I have complete confidence in KCR but I would be interested in getting others opinions on this issue. I have always wanted to see 50 to 65 psi for V8's with a peak HP at 6000 to 6300 rpm. I realize the flow versus pressure is much more complicated then this rule of thumb.
My cold pressure is 60 to 65 psi @ 1500 rpm. The lowest I have ever seen it once warmed up ( 200 to 220 F
oil temp) is 43 psi at 5000 rpm.
As a side note the bleed down leak with the block warm and testing at 125 psi was 1 to 3% with 7 of the 8 cylinders 2% and less. I am under the impression this is very good sealing and an indicator of the build quality.