Does anyone know what the length of a new oil pressure relief valve spring in a 213E engine is?
Mine has the vane-type oil pump fitted, and was running at 30 psi; the spring length is 1.965"
Calculating the spring force and piston area meant that adding in a 0.96" spacer between spring and piston would raise the oil pressure to 37.5 psi, which it has done (i.e. the calculations were correct).
My Zodiac handbook states the oil pressure should be 50-60 psi (but.... Richard Prosser, PO confirmed he drove the car hard, and the engine rebuild was years ago so the low pressure could be easily explained by worn mains, big ends etc).
If no-one knows what the spring length should be, what pressure are other Sabre Six & straight six coupes getting?