Stock fuel filter

[Focker420]

I am upgrading my fuel lines to 3/8 steel tube, from pump to the filter at the front. What is the stock filter capable of for flow?
Do i have to worry about this line from the pump feed?

Also i read on 2gnt that you can use the old feed line as the new return, and was wondering if this is necessary, or is the stock return succulent . I don't know what psi i will be running i have a 255 walbro and 650cc injectors, Still need a fuel rail tho any advice?


Ty Nate

 

[link16]

Remove stock fuel pressure regulator



The stock regulator is located on the right side of the car, just forward of the fuel tank. It is attached to a fitting at the front of the fuel filter.



Remove from the regulator the rubber hose that leads from regulator to fuel pump module at the top of the fuel tank. Leave the other end attached to the fuel pump module.



Disconnect the metal line from the regulator fitting using a flare nut type wrench. Remove the bolt that attaches the fitting to the fuel filter.



Remove the regulator and fitting assembly from the car. Carefully loosen the nut that secures the regulator to the fitting, and unscrew regulator. Take care not the damage the surfaces on the fitting that seal against the seal washers that seal the fitting to the fuel filter.



Re-install the fitting to the regulator front, but install it upside down from the stock position so that the port where stock regulator screwed in is no facing down instead of up. Be sure to also reinstall the sealing washers on each side of the fitting.



Install the new brass fitting into the port previously occupied by the regulator (see Figure A). Be sure to also use the 12mm copper sealing washer provided. Install the –4 flare cap provided onto the new fitting. This cap can be removed should you ever want to drain the fuel system.




Figure A: Fitting installed in place of stock fuel pressure regulator.




Prepare and mount new fuel pressure regulator



Consult Figure B. Install the fittings provided as shown into the fuel pressure regulator. Use Teflon paste on the threads.


IMPORTANT NOTE! The tee screws into the IN port on the regulator.


Install the regulator to its bracket. Install the bracket to the heater hose pipe on the front of the engine as shown in Figure C. Use the cushion clamps and nuts/bolts provided .



Install new metal return line



The metal tube (fuel line) provided with this kit will be used to transport (return) fuel under the car to the fuel tank. It will be connected to the tank sending unit and the regulator outlet with the 1/4” fuel hose provided. The hose between the new regulator and the forward end of the fuel line (on firewall) will be 42” long. Between the line and the tank, the stock hose originally attached to the stock regulator is used.

That is from the HRC instructions. I hope that is sufficient information for you, if you run a rubber hose under the car I suggest using undercoating over that.

 

[Blitzeclips]

Your car probably won't idle.
660's are way too big for your set-up.

 

[XMasta19]

How bout more specifics on your setup, that would most definitely help.


...and what in the world about the stock return being succulent

 

[Talon ESI-T]

My personal opinion. The factory feed line makes a perfect fuel return line. The 95 return line is terrible for high volumn pumps. Steel line is unnecassary due to the fact it can be cumbersome to work with...use aluminum. Factory fuel filter....it will work and flow just fine. I use a Russel 6an reusable filter.

This is my setup.....

Factory fuel pump hanger modified with 6an feed fitting.

6an braided line from fuel pump bracket to russell fuel filter.

Russell filter installed between braided AN hose to 5' 3/8 Aluminum line that runs the chassis rail.

At front crossmember alum line ends and 6an braided continues between chassis and crossmember. AN hose runs to the same location the factory line ends.

An hose terminates into a 6an "T". One end of "T" goes to regulator via alum line and the other outlet of the "T" goes to the fuel Rail via AN hose.

The regulator output is connected to an Alum line that goes to the factory feed line.

The factory feed line in the rear goes to the fuel pump return oriface in the pump bracket via a braided AN hose.

There are some changes I am making this year but this setup has proven to outflow anything I am going to require. Its overkill., I admit that.

 

[Focker420]

Ok im just a little confused on why your fpr is befor your fuel rail the instruction for the aeromotive fpr say to install after the rail on the return side.

So use the feed line as the new return line, and run alum line from the pump towards the engine bay go to ss line (SS braided lines) fom there to the rail.

Don't apprecieate any negitive input thanks...

I have a 1:1 aeromotvie afpr, 650cc RC, and will be tuneing with MS. Running stock fuel filter for now.

 

[Talon ESI-T]

neg input....I dont have the foggiest idea what your talking about.

As for my regulator, yes it is in the feed line "T'ed" with the fuel rail. Thats done for a specific reason that is a moot point to your setup. Ideally the reg should be off the fuel rail but in my case the pressure of the rail remains consistant with the pressure of the feedline. Technically speakign our cars have the regulator in the rear as designed so I have basically mimiced that type of setup.

The changes I have in mind have nothing to do with functionality just personal preference. I am not telling you to go with my setup, if you dont appreciate the info then disregard it. A lot of testing has gone into my design and it performs as planned on dyno sheets as well as on the street.

Terry

 

[Focker420]

Terry sorry i wasn't regarding you when i was talking about neg input anything you have said i have taken seriously and appreciate your input.

I was leaning more to wards (Blitzeclips Your car probably won't idle.
660's are way too big for your set-up.) i appreciate your input, You are usually very informative and knowledgeable. So lets keep it to what can be done.


When you talk about our cars having a regulator in the rear you mean the fpr, cause on mine the 95 the fpr is mounted on the end of the stock fuel rail. Is there one in the rear as well?. Don't think we have 2.

So the feed gets changed to 3/8 alum line with about a 2' length of SS line off each end from the pump, to filter, from filter to rail.

Off the return side of the rail to the afpr, with some more 2' SS line,
Then the old feed system can be used as the return side because the return side must be upgraded too.

Also just wondering if this is correct your afpr is located off a T at the front.
The input to the afpr is from the FEED side, and your afpr output is connected to your factory feed line which is your RETURN side. Right?

 

[Blitzeclips]

I was leaning more to wards (Blitzeclips Your car probably won't idle.
660's are way too big for your set-up.)

Try updating your vehicle profile and maybe it wouldn't happen. I see N/T w/ 650's and think no. Sorry, can't read your mind or car set-up over the internet.

It wasn't negative input by the way. It was a warning. Interpretation can manipulate any general message. But hey, what the hell do I know?

 

[tkelly27]

Also just wondering if this is correct your afpr is located off a T at the front.
The input to the afpr is from the FEED side, and your afpr output is connected to your factory feed line which is your RETURN side. Right?

100% of FPR inputs come from the feed side. The outputs are always the return side. That's how they work, they're basically a pop off valve that open at a pressure that you set. It really doesn't matter where it's at as long as it's arranged like that. Although it's a good idea to keep it near the fuel rail.

If you're running a new feed line, then you could and probably should use the old feed line as a return.

Having good amounts of fuel available is a real good idea.

In the rear refers to the end of the fuel rail.

The SS or rubber fuel line needs to be on there because the engine moves in the car, if you don't have it, you run the risk of cracking whatever pipes you've ran. 2', 4", really doesn't matter, just needs a flex point and it will make it a lot easier to cram in there (think removing the stiff turbo oil lines, yuck!)

 

[Focker420]

Thanks tkelly27 for clearing that up, the instruction for the afpr say to install on the return side and the afpr output back to the return side so, when terry was explaining his fuel setup i didn't know why he set it up that way..

I'm pretty sure i got it all figured out now so I'll take some pic's and let ya know how it goes.

 

[XMasta19]

In the rear refers to the end of the fuel rail.

No...

This is 420a tech...in our case, in the rear means in the rear. The stock fpr on the late fuel system design is back by the tank under the car. Granted, your car has the early fuel system as you said, but Terry was just explaining things for a much better understanding of the general concept and why he did his how he did.


An AFPR is an Adjustable Fuel Pressure Regulator...just like a regular fpr but adjustable . A fpr does just that, regulates the fuel pressure. So with your megasquirt and aeromotive, you will use it to set your static and idle fuel pressures accordingly. It's good to see you're figuring stuff out though...just keep on researching and ask the appropriate questions when necessary. That's why guys like Terry and I are here ...sometimes