Join Date: Feb 2011
Location: Rancho Cordova, CA
Bronco Info: 1995 EB 351W, E40D
Building a "loose" engine for the street is a bad idea. For the minimal gain in HP you're severely limiting it's life. Installing a hv pump then running thinner oil is also a race only application. Some of our guys run really thin oil for qual then switch for the race, what are they gaining? I bet less than 1 to 3 hp at best..
FWIW BMW reduced the oil pump volume in it's S54 3.2l engines to gain 3hp but at what cost? Bearing recalls, reduced rpm limits etc. Our current race S54 uses an enlarged chamber pump and 10w60 race oil. We still exceed our HP expectations and are able to rev to 9k.
Ford builds engines that will run over 300k miles if maintained properly, I'd guess the oiling system is more than adequate for street use.
Kingfish999 - run the HV pump and good race oil, you can also get a heavier duty oil pump drive shaft. Also if you're in danger of oil starvation look into a Canton ACCUSUMP. I am assuming that your running those rpm's in a race / HP driving environment?
EDIT: Just read your info, Submarines should be running on diesel or nuclear anyway :)