Do I have a problem or what?
I have a brand new engine 454 60 over in my jet boat. All new parts inside, rods, pistons, cam, crank all top of the linetop stuff. Has twin remote filters, oil cooler the works. Changed oil and filters after 20 min 2000 RPM break in. It held 60 to 65 pounds pressure during break in at 150 water temp. Then I ran the boat to 1.9 hrs with a few hard passes and changed everything again.Oil looked ok after that and the pressure seemed to stay rather high in that first 1.9 Hrs. Ran boat last weekend up to 4.0 hrs made a few hard passes then pulled filters and drained the oil out of them into a clear container, looks OK to me. Will be cutting the filters open in the morning to look at the elements. The change in pressure is starting to bother me, I don't want to hurt this new motor. When you fire it up now it's 50 lbs at 900 RPM goes up to 60 or 70 at 3000 RPM. then when you run the boat hard 5300 RPM for a few seconds pressure drops down to 25 pounds at 900 RPM. If you then make another WOT pass with oil hot at 5300 RPM pressure only builds up to about 30 to 35 pounds at WOT but still holds 25 pounds at 900 RPM. Shut it off for a few mins and when fired back up it's back to 50 pounds at 900 RPM and climbs to 60 to 65 at 3000 RPM but as soon as you do a few WOT passes it's back to 25 pounds at 900 Rpm and will only build to 30 or 40 at WOT. Ran it for about 1/2 hour today and don't feel good about what the gauge is telling me. Has new Autometer electric gauges, Milodone 8 qt pan, running standard wix 51515 filters, running 9plus qts of PENZ 25-50 race oil and a Dyna Gear high volume pump. Oh yes the water temp is cold, only 120 at best all the time with gate valve wide open. I am totally new to all of this, don't want to hut the thing so I'm looking for feedback. The old oil does look have a super super fine goldish sheed mixed in with it, this super super fine trace color has no texture at all and is hard to see unless you shake the container up. Theis sheen seems to come to the top wheh you shake the used oil container up. I'm told what I'm looking at is the zink content in the race oil and normal break in oil discoloration? THANKS!