…………………Wonders will never cease, an old BSA with some oil pressure. Running from cold it produced about 25 PSI on a slow chugging idle speed, with just over 40 PSI on a slightly faster idle. With about 3000 RPM it produced around 70 PSI.
A 1972 version of this engine I tested a few weeks ago gave 70 PSI at a slow idle speed, these have an uprated cast iron oil pump which is not so easily damaged or worn.
I also repaired one of the engine sump plate threads and replaced the 1/4 inch cap screws with studs and nuts. The studs have been made long to accommodate a new, thicker alloy sump plate I plan to machine from a billet of aluminium. This is a common area of damage and bodgery. I knew the home workshop would turn out to be useful for something.
Edited By Lathejack on 15/06/2015 19:30:46