What is a good oil pressure for 1.6 cvh? My engine is rebuilt and bored to be a 1.74L with bigger cam and ported head and oil pressure is 1.2bar at warm idle with new ford oil pump. Has anyone added a shim to the oil pump spring to increase pressure? And how thick shim?

 

I can't see how shimming a spring would affect idle pressure. Doesnt the spring open at say 70psi and shimming makes it open at 80psi ?

 

I don't know I just seen people shim oil pumps for higher pressure

 

1.2bar is fine for a hot cvh at idle