should i use 6an for 8an size hose for the pressure and return lines ? any opinions

 

Well considering you didnt post your current HP or your eventual HP goals its kinda tough to tell you. If you are planning on running up to but not past 800 -8 feed is fine and -6 return. If you want to run more than 800 you will need -10 feed and -8 return. These are all estimates also... you could probably run more power but it would be pushing it.

 

I wouldnt bother running -6 if your going to actually convert it all.

 

oh yea i don't plan to go past 600 if that. so 8 feed and 6 return, thanks for the info

 

Np