Originally Posted by Riffraff Performance

The problem with this question is really in the terminology that has come about in the diesel industry for these products. "Regulated Return" gets thrown around alot, but unfortunately many people have different definitions of what it actually is. Installing a "Regulated Return" really is a misnomer since the stock fuel system actually has a regulated return path stock. Many people get hung up on the fact that the aftermarket "Regulated Return" has easily adjustable fuel pressure and think that is why they need to install one. In reality if all you are after is fuel pressure adjustment that can be had by shimming your stock FPR.

There are two main reasons a "Regulated Return" was created. First was to open up the "dead head" fuel rails and allow a path for the air entrained fuel back to the tank without having to pass through the injectors. Second was to use larger feed lines so that at WOT with larger injectors you would have enough fuel to keep from having a significant pressure drop in the fuel rails. Because of the many different kits they all have little differences so encompassing them under one same isn't really the best either.

So it can be simplified as follows; ending the "dead head" on both stock and high hp trucks is always a good idea, and to see if you need more volume to the heads use a fuel pressure gauge to make the decision, not marketing.

Our FRx was manufactured to cure two things; stock "dead head" fuel rails, and the need to spend a huge amount on something that could be done more simplistically. With this new 2nd Generation FRx we have retained our custom CNC billet fuel cap, but have upgraded that lines with Parker SS Braided lines, and are also including extra springs so you can adjust the fuel pressure where you want it to be. This system will service more than 75% of the enthusiasts in the market while allowing an easy install at a low price point.

If you are going to use large injectors, ~200cc and up, you might need to look into larger feed lines which can be done with or without a "Regulated Return" kit.

The point of this post is to help people not be up-sold on something they don't understand due to incorrect and varying terminology.

Originally Posted by MR5x5

Also... There are two flavors of FRX out there, one with a simple regulator, and one without. Dino Fuel Alternatives (not sure what other sponsors) sells both:

With Regulator:
Dino Fuel Alternatives | Product Detail

Without Regulator:
Dino Fuel Alternatives | Product Detail

For what it is worth, I run the version without the regulator and performed the FPR mod (costs about 1$) to raise my fuel pressure a bit.

Cheers

Originally Posted by bdrummonds

Just a quick note here,

DFA filed for bankruptcy last summer and is no longer in buisness. The Veggiestroke technology (and remaining inventory) was bought by Biofuels Technologies. they do not have any previous customer history for DFA EXCEPT for veggiestroke stuff. They do not carry parts for the Hi performance FASS Fuel pump kits, the CCK, or the return with regulator.


I found all this out when my DFA FASS pump gave up the ghost last month.....

Originally Posted by ajorn

Sean -

For what it's worth, I installed my fuel bowl delete / RR because of the previous veggie setup on the engine. It was using some sort of vaccum instead of pressure to deliver fuel. I ripped out everything and started over. For my future goals of something like 200/30 injectors my fuel setup probably isn't necessary but because it was screwed up in the first place I figured it was best to "fix" it completely.

When I hit WOT my fuel pressure needle doesn't move at all, maybe it would be that way with just a FRx.

Here is a link to when I installed my RR, it also links to parts from JEGGS and will give you an idea on prices, if I remember right I had around $250 in the whole system:

https://www.ford-trucks.com/forums/9...ml#post8665013