Ok, so now I'm confused. Where exactly are these check valves. Down inside the head? Or are they in the fittings between the head and the line? If they are in those fittings, then you shouldn't have those check valves anymore as you replaced those with the fittings provided by DI. Right?

 

Yes, I will keep the stock lines. When I got my injectors, I only got 175/146's. The truck will never be raced. Its a truck that works hard, that needed injectors. Unfortunately, no matter how big the fuel lines are, feeding the heads, the fuel still has to go through a #2 (1/8 inch) npt fitting. And that hole is less 1/4 inch (IIRC). Having more fuel at that point is good, but it can only flow through that less than quarter inch fitting. While I had mine out, I also drilled the screen, and through the whole assembly, with a drill bit the same size, as the smaller of the two ends. (Cant remember the drill bit size). Nice smooth non restrictive flow.

I have also put ITP's kit on our early 99, since I got the injectors for that truck from Beans, I also got their fuel system. (ITP's) (package kinda thing).

I have had no issues with either system. The ITP is nicer, and a full replacement system from the fuel bowl to the heads. It also costs about 150 more. But it is very nice.

 

Yes, they are a "stud" that thread into the head, and the stock fuel lines thread on to them then. Passengerside rear of the head, drivers side front of the head. And it depends on the fuel system on if they get replaced or not. I know that on the ITP kit, they do replace them, while on the Swamps kit, it does not.

 

Ok, thanks for clarifying!! I replaced mine when I built my kit. I just got to thinking after reading Curtis' comments that I might have missed something that they were still in there.

 

I don't remember ever removing mine when installing the DI kit. I could be wrong though, it's been a while and I was doing 3 mods at the same time. I coulda swore the check valves stayed in place.

 

yes it does take them out





Regulated Return Fuel System


This is the complete dual circuit, externally regulated fuel feed system. The kit consists of everything needed to convert the stock fuel feed system to a dual feed external regulator setup. This will feed the heads from the rear, come off of the front of the heads to the external fuel regulator, then back to the fuel tank. All of the pressure hoses are Parker 221FP and rated for diesel fuel use and are assembled in a Parker hose manufacturing facility. All of the check valves are removed and no restrictors are required. This will allow you to run your fuel pressure up to 65-75 psi, compared to the stock 53 psi. This also allows the fuel to circulate through the heads rather than dead ending in them. This entire kit requires no cutting, flaring, welding, duct tape, or bubble gum to install , and it is 100% reversible to put the truck back to stock. The typical wrench head will spend 3 to 5 hours installing the kit.
As the fuel is now being fed from the rear of the heads, the number 6 and 8 injectors will no longer have to fight for fuel and the result of that is a more efficient, quieter running engine. It is also recommended, but not required, that if you have a long lead injector in the #8 position, that it be replaced with a standard "AD" injector.

 

Nice. I stand corrected. My check valves are gone. LOL.

Woohoo, good news for me! And thanks for the clarification too.

 

them are 3/8 rubber lines comming off the bowl going into 3/8 hard lines....the check valve is about the only restriction with the screen and all..the next restriction is in the front of the heads..from what i hear..unless you going over 600 HP they are nothing to worry about...as far as the bowl..the only down fall is possable leeks...

 

Yeah, the more and more I got to looking at them, they looked like 3/8" hard lines. It's sometimes hard to compare the hard lines to the hose. I'm hoping that they've still got this trashed block so I can see it in person when I'm down there in 4 weeks!!

 

new trans??

 

YEP! and injectors too!!

 

very nice...good luck and congrats..keep us posted with the new power..

 

Thank you!! I will. Been taking pics of my motor swap and all, but keep forgetting to bring the camera in to upload the pictures. I'm back within a day or so of having it running again. There will also be some pics taken while down there. I'm hoping to get on BTS's dyno before and after to see the difference. If nothing else, after!!!