400/450 stroker....Cheap parts, lotta work.
Going through my oil pumps I found three new Melling HV pumps and this used one. This one was used on a 500 stroker we had on the dyno that was running really low on oil pressure. We replaced this pump with a new one and still had low pressure. It turned out that the line boring job on the block was so poorly done that the main caps were spreading and giving us large main bearing clearances. Fortunately just using a larger bevel on the edges of the main caps where they seated against the block register corners cured the problem. Well, that and line boring it a third time.
So now we have this used pump that we had already ported (yes ported) that we'll use in this build. We also use a ball burr to remove the edge of that sharp turn in the block that comes from the oil pick up.
Cleaned, lubed, re-assembled, and sealed in a bag to await it's installation.
Going through my oil pumps I found three new Melling HV pumps and this used one. This one was used on a 500 stroker we had on the dyno that was running really low on oil pressure. We replaced this pump with a new one and still had low pressure. It turned out that the line boring job on the block was so poorly done that the main caps were spreading and giving us large main bearing clearances. Fortunately just using a larger bevel on the edges of the main caps where they seated against the block register corners cured the problem. Well, that and line boring it a third time.
So now we have this used pump that we had already ported (yes ported) that we'll use in this build. We also use a ball burr to remove the edge of that sharp turn in the block that comes from the oil pick up.
Cleaned, lubed, re-assembled, and sealed in a bag to await it's installation.