In response to a post that was archived, I got off the phone with Turbonetics who said their turbos (single BB and floating) should have no problem handling honda's oil pressure and should be fine all the way up to 120 psi. This would seem to support the no restrictor theory.

 

some turbos need it some dont.. i got my t3 from ebay and the seller told me i had to use a restrictor.. so i did and i dont have any oil problems..

 

i'd put one in regardless