Hello,

For you DIY ers, I made a crank scraper for my 5.3. I used a General # 837 contour tool. Laid it on a metal ruler to give it the right height. Rotated the crank to fit it with the tool. Transferred the outline to cardboard to make the final adjustments. Used that for a template for the steel and cut it out. Left about 1/16” clearance. Also opened up the vent slots on the windage tray.

I cut out the windage tray where the tube tab is on the left side so that it sits as original.

By the way, on my truck, the clamp that bolts the oil pick up tube does not do a thing. It is the two windage tray bolts the hold the tube in. The ring in the tube sets .050” below the surface of the oil pump so the clamp does not hold it in.
Hope that helps.

 

Pretty cool man, be awesome to know before and after numbers. Seem some impressive results elsewhere from scrapers/windage trays and custom oil pans. They did a good episode of it on engine masters

 

Best I will be able to do is a dash mounted 1/4 mile run test for the before and after. With a smaller duration cam, ported heads and a .040" over bore on the cylinders with flat top pistons that will be interesting. Only have about 900 miles on the OVH now, and with snow on the roads ------that new test run will awhile. The next step up with a scraper would of been a layer of Teflon sandwiched between two metal plates that form a perfect fit. Would of needed a smoothed crank and dropping the oil pan to check and keep the pick-up screen clean. Too much work on a 4X4 truck.