Tried the Power Adder board..but no one seems to have any ideas here.I am in the process of redoing certain areas of my fuel system this winter to better accomodate my 355 and NX Hitman nitrous system.I am currently running a Holley pro series "black" electric pump.I run the Mallory (#4309) 3 port regulator with return line hooked up to the stock sending unit.Question is..does the return line have to extend to near the bottom of the tank where it dumps inside?I am going to weld an -8AN steel fitting to the back of the tank for the feed line to the pump..no biggy there.Did a few searchs and this seems to be the easiest way due to the problem of no way of running a true sump with stock configuration exhaust..muffler out back(Flowmaster Force II).Then I plan to weld another -8AN steel fitting to the topmost part of the fuel tank on the front (right behind the rear seats driver side) for the return line.Do I need to have a piece of line extend from the fitting (inside the tank now) and turn 90 degrees down into the tank to dump the returned fuel closer to the bottom of the tank?Or can I let it just dump from the fitting up high on the tank?I have heard from a few people (you know how that goes...lol) that just letting it dump from the fitting into the tank will aerate the fuel if less than a full tank and cause problems with pressure,flow,etc.Anyone been thru this..have ideas or suggestions..please...they are more than welcome.I want to do this once.Anything is much appreciated.

 

on a typical stock set-up, the return line goes all the way to the bottom of the tank. the only reason I can figure for this is so the fuel doesn't create static electricity by running down the tank. this seems really **** but it actually caused many fuel tanker trucks to blow up back in the early days. this was before they figured out the physics behind it and grounded out the tanks. but I doubt it matters where the fuel dumps in the tank. I couldn't imagineany difference in a performace level other then the fuel would be cooler after running down the sides of the tank. the fuel actually gets quite warm after going through teh pump and regulator. I doubt it rally matters.

 

I could see it to prevent aeration too.