Wet sump oil line size

I have a new Moroso pan with a -20 outlet. P&P pump has a -16 fitting. Question is -20 line with reducer at the pump or -16 line with reducer at pan?

 

RCD makes just what you need

http://rcdengineering.com/search/oil-systems/fittings?view=2&cat=3158

 

oil line

Run a -20 if you can work it in. I run a -20 on mine with a KB billet pump. Don

 

Oil line size

Do like Don said run a -20 from pan to pump we do the same thing with an olson pan and kb billet pump on tfx with zero issues. My other engine has a williams pan with a dual pickup and im constantly fighting with it. Just think of it like this you start putting adaptors on lines and that will give you a better chance of having failures. Puts too much of a strain on pump by reducing the hose size. Don Ominus is a well respected guy so you can trust anything he says.