What fuel system is the best or most recommended? I have been looking at the RASP, FASS and AirDog? Also, which is the best for the money? I would also prefer it not to be too loud. I have a 2005 Ram which will have twins,etc. 500-600hp. I also know that these may not be ready for the 05, but let's consider they are available to work with the in-tank pump. Thanks.

 

I dont know about the in tank pump problem.
I use a FASS and it works great for me.
Price was good to. About 3 hours to hook up (next one will probably be alot less).

 

A little spendy, but I would go with the Rasp & not have to worry about it again. Be nice to see fuel pressure increase at wot with big hp instead of getting sucked down to 0.

 

I definately like the concept of the RASP... purely mechanical, very little to go wrong, and an electric backup to get you home if needed. However, I don't know if it's available for the 3rd gens yet (last I knew, installation on the 3rd gens required removing and cutting the fan blades)... it's higher in price than a FASS, and you're on your own to plumb it (no fuel lines/fittings included with the kit - just a pump). Pressure on the FASS never drops below 14psi or so, even on extended WOT runs at over 500HP, so pressure isn't the issue. The FASS provides for better fuel filtration, as it can be fitted with a 3 micron filter (rumors abound regarding a 3 micron OEM-style filter, but no one's been able to offer an exact part number).

Not trying to dump on the RASP, as it's a fine product. Just trying to point out some of the drawbacks as compared with other fuel systems.

 

I got the FASS and have nothing but really good things to say about it. Everything was included in the kit for the install, it offers much better filtration and it separates air and vapor from the fuel before it gets to the injection pump. I think they are all great products and way better than the stock lift pumps on the '03.