High pressure oil feed line diameter

[Dave]

I haven't heard any mention of restrictors before, but the oil inlet on the CHRA is already about 2mm, I guess that means the restrictor is built in. I see what you mean, as long as the restrictor is restricting the oil flow, the correct pressure will be maintained. But I will go with a 1/4 inch hose anyway as that appears to be what everyone uses.

Im just mentioning this because on the lorry blower I have it uses an oil feed pipe of 10mm to the blower, so oil pressure would be non existent if I didn't make a restrictor for it.