Interesting never noticed anything like that between a 25ft and 160 ft. I guess it is so small of a thing for it to be noticed.The size of the hose will affect the flow rate no doubt, especially over distance.I don't what you guys are talking about loosing pressure or water flow using 1/4 long hose runs. I have a 100 ft of 1/4 hose and I use it sometimes with a porty pump 400 psi or the water otter 500psi and I don't see any difference when I use to have 160ft when comparing both, however I do notice the heat is higher with a shorter hose then a longer hose. Just use 1/4 50ft or 100ft what ever, it will do the job great
Portables are more affected by this than truckmounts however.
This is due to the fact that truckmounts use postitive displacement pumps (think triple plunger cat, general etc) and have higher flow capablities then the much different type of pumps that a portable uses usually with a lower rate flow as well.
I use 3/8 hose with my portys and use stainless straight thru flow QDs to boot too and have really nice flow.