Schober Motorsports
Well-Known Member
Hey guys... I got a weird one for you.
Got my engine back together after the last block cracked. All new rotating assembly, mains are .002 Full Groove and rods are .0022-.0024. All the plugs on the inside of the block are plugged to include the 3/8 stock pickup as I am running an Milodon external line. Here's my issue. Broke in the cam yesterday, got about 12 mins in and started loosing oil pressure and I shut it off. Was at a solid 80 psi and it started dropping and dropped to 20psi at 2500 rpm so I shut it off. Checked oil pump driveshaft, that had not been broken. I put my drill into it and it came up to 80 psi... Next day I put it all back together, fired it up and its back to 80 psi. After a little bit and the motor got warm, it started dropping again. This time to 40 psi. When you hit the throttle it goes down in oil press psi and has a real hard time recovering... Its a brand new Mellings HV pump w/ Milodon cover & -12 AN fitting to the pan. The pan is from Milodon as well and is one of those 7 qt pans with the pickup tube built in. I also changed the oil filter w/o change.
Any ideas? ...Thanks
Got my engine back together after the last block cracked. All new rotating assembly, mains are .002 Full Groove and rods are .0022-.0024. All the plugs on the inside of the block are plugged to include the 3/8 stock pickup as I am running an Milodon external line. Here's my issue. Broke in the cam yesterday, got about 12 mins in and started loosing oil pressure and I shut it off. Was at a solid 80 psi and it started dropping and dropped to 20psi at 2500 rpm so I shut it off. Checked oil pump driveshaft, that had not been broken. I put my drill into it and it came up to 80 psi... Next day I put it all back together, fired it up and its back to 80 psi. After a little bit and the motor got warm, it started dropping again. This time to 40 psi. When you hit the throttle it goes down in oil press psi and has a real hard time recovering... Its a brand new Mellings HV pump w/ Milodon cover & -12 AN fitting to the pan. The pan is from Milodon as well and is one of those 7 qt pans with the pickup tube built in. I also changed the oil filter w/o change.
Any ideas? ...Thanks