Thread: Gen V oil pressure issues

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Originally Posted by gravensg

The bearings were inspected and plasta-gauged at the time... I do not recall a # but I called the builder and the clearances were accurate with his records. He stamps the block and can look up the build sheet. The builder started the motor on a test stand and broke it in; only way he would stand behind his work. I moved, and the 90 days has long expired since the original light off.

Started at the 5W-30 and am now at the 10W-30. I did run 20W50 in it once just to see and do not remember it having a “WOW” type effect when hot. I guess I need to pull the motor again. Several K in the machine work and parts, and I am thinking I would like to keep the parts inside the block, or the bearings in place.

I am not happy with 45 when the motor is designed to pull 6K RPM. I believe the rule of thumb is 10 psi/1k in RPMs’.

that s.. bull $hit i have built many bbc you want more then 45 when at WOT you have still not said were your bearings are at ? spec is 001.5 to 003.5 like i said if loose it going to be low try a strait 40w or 50 w your still at 45 with a HV oil pump? what cam do you have ? the wrong roller lifters will bleed off psi if its still looks good then it loose bottom .i never check much with plastigage i set my mic i read the crank size off and set the bore gage off the mic size and read the housing bore with bearing in thats the only way to know for sure