Originally Posted by getrdunn (Post 4536634)

I've never liked those bypass valves and eliminated when ever given the chance. If oil has to go through bypass you already have issues. Block and change filter more frequent.

Originally Posted by 89 warlock (Post 4536558)

Re did the motor about five years ago it was a ZZ502 block and we stroked it and made it a 540 even with a ZZ502 block the oil pressure was kind of the same situation I have now.the pick tube cracked last year and we put a new oil pump in it milodon 18760 and pick up tube and canton oil pan and block adapter. It had a meling hv pump in it before. Changed the oil lines to 5/8 id and the connectors are 7/16 id . The housing where the filter mounts is a stock merc unit. The clearances on the mains and rods are .002 . When we made it a 540 I also put a 30lb bypass valve in it

Originally Posted by mike tkach (Post 4536650)

what brand&weight oil are you using?also,.002 rod&main clearance is to tight for a bbc,espically a 540 marine engine imo.

Originally Posted by ezstriper (Post 4536688)

change the oil filter adapter to a moroso or canton and try a wix(napa gold) filter, I lost 15psi by switching filters once, scared the hell out of me...but the stock merc adapters I've seen are very restrictive..

Originally Posted by AllDodge (Post 4536740)

I to am using wix racing on the boat, but wouldn't use them on a car unless its just used for track racing. They don't filter as fine and there is a lot more crud passing by a car, just an opinion

Originally Posted by 89 warlock (Post 4536737)

I changed the adapter on the block to a canton , but not the one the filter screws onto , only filter I use is wix racing, been using them for years on the boat and my old muscle cars