- Joined
- Jul 19, 2011
- Messages
- 4,829
- Reaction score
- 19
- Location
- Pittsburgh, PA
- My Car
- 1973 Mach 1 Q code 4 speed
1973 Chevelle 454 SS
2005 Magnum RT
2008 Colorado
Just inspected the main bearings in my 454 from my last project after 50 miles driving. Main#1 was perfect, #2 showed little wear, #3 showed slight babbit loss as did #4. #5 Thrust bearing was totally deystroyed.
On this build the crank mains journals were turned 20 and rods 10. Installed a melling high volume normal pressure pump during the build.
On cold start up had about 70PSI oil pressure. At operating temperature at idle had 52 PSI and while driving ~65-70PSI. I knew that was too high so called melling tech support. They said relief on HV normal pressure was set at 70 PSI:dodgy:.
Installed standard melling reg pressure, reg volume pump and got
45 PSI cold, 35 PSI hot idle, 45 driving 3400 RPM:dodgy:
I'm suspecting I got a HIGH VOLUME/HIGH PRESSURE that starved my journals for oil since the oil feeds from the front to the back and I'm using a stock pan with 5 quarts of oil.
Anyone have some suggestions
On this build the crank mains journals were turned 20 and rods 10. Installed a melling high volume normal pressure pump during the build.
On cold start up had about 70PSI oil pressure. At operating temperature at idle had 52 PSI and while driving ~65-70PSI. I knew that was too high so called melling tech support. They said relief on HV normal pressure was set at 70 PSI:dodgy:.
Installed standard melling reg pressure, reg volume pump and got
45 PSI cold, 35 PSI hot idle, 45 driving 3400 RPM:dodgy:
I'm suspecting I got a HIGH VOLUME/HIGH PRESSURE that starved my journals for oil since the oil feeds from the front to the back and I'm using a stock pan with 5 quarts of oil.
Anyone have some suggestions