Hey guys. Now that my boat is on the water I have a question regarding oil pressure/temp.
I don't have an oil temp gauge.
I'm running a 454 .030" over 9-9.5:1 500hp/500ft lbs motor in a jet boat spinning a Legend A impeller. I mostly run up around 3500-4000 RPM with the occasional 5,000RPM bursts here and there. The oil pump is a Melling M77G pump. I cannot remember for the life of me what weight oil I put in this motor when I changed it after the break in, but my question is...
When the engine is cold (first startup of the day) it idles around 50psi. However, after I've been running around the lake and the engine and oil are good and warm my idle pressure drops to about 25psi. When cruising it's right back up at 50...but at idle it's at about 25. Should I be running an oil cooler? Or will running a heavier weight oil help the situation?