Thanks for the comments Lynn.  One other question came to mind though.  I have a remote sump on the single rotor, so the line from the stock oil pump will be "suction" to some extent.  I believe you have a dry sump system, so you probably have the same situation, only worse perhaps.  Are you using these Aeroquip hoses for suction as well?  

I have two short pieces of stainless braid reinforced teflon lines in dash 12 for suction to the scavenge sections. Those two pull all of the spent oil and a bunch of air from the sump.

 

For the run from the tank to the pressure pump suction side, I have a piece of 1 1/4" electrical conduit. So suction collapse is not a factor.

 

I would not trust the blue stuff for suction unless it is a very short run or has a spring installed in it.

 

Lynn E. Hanover