Regulated Return vs. FASS/Airdog

[AlwaysStrokin']

I'm thinking this summer I am going to add either a Regulated Return kit or FASS/Airdog. I was wondering what the pros and cons are of both types of systems. From what I understand they more or less do the same thing just in different ways. I know that they both have similar price ranges, so I wanted to here what you guys think.

Also I was thinking that I would add the FRx if I did the FASS type set up to equalize the fuel rail pressures and I might as well do the HPx.

What does everyone think about the two systems?

I'm not really looking for brand comparisons right now just in general of the two types of systems.

Thanks in advance

[JSchuricht]

Do the regulated return first. I have been running the AD and Sinister RR for over 30,000 miles. I installed the AD almost 2,000 miles before installing the RR and couldn't tell the difference. When I installed the RR there was a huge difference in how smooth the engine felt and sounded.

[AlwaysStrokin']

Originally Posted by JSchuricht

Do the regulated return first. I have been running the AD and Sinister RR for over 30,000 miles. I installed the AD almost 2,000 miles before installing the RR and couldn't tell the difference. When I installed the RR there was a huge difference in how smooth the engine felt and sounded.

Thats weird the FASS is suppose to get rid of water and air so you'd think it would have the same affect.

Thanks for your insight.

[AlwaysStrokin']

Only one person has input?

[AlwaysStrokin']

People can talk for 30 pages about pointless crap but out of all the people running FASS or regulated returns don't have any input.

[Solid98]

#1: It's the weekend.
#2: It's NFL playoffs.
#3: Most people are at work when they are on the board.

Bump it back up on Monday morning and you will probably get more input.

[molokai]

Reg return

[njjeep]

im not an expert but the regulated return eliminates the dead head problem with the fuel system. the fass and airdog just help eliminate air in the fuel.

Sinister Diesel 7.3L "Standard" Regulated Return Kit

[cbremodel]

reg return runs real smooth , very happy with mine. worth every dime

[a5t1]

I did both. A guy sold me a FASS that was supposedly for a powerstroke but I was getting low psi. Long story short I use the FASS as a lift pump and then feed a stock fuel pump then us my RR for pressure and return to the tank. Works great, smooth idle etc. I would do a RR first.