I was thinking of changing my fuel set up. I have a brand new WIX vette filter with fittings I might sell and go this route. I want to use an aftermarket regulator but I do not want to have two 6 an lines going from the tank to the engine bay.

I want to use a Y block


My plan is
Feed line off the tank into this block
run the return line back to the tank (same end as feed from the tank) and
then the main feed (with fuel filter) up to my fuel rail with a AFPR on my fuel rail.




Thoughts?

 

It's best if the return line is filtered fuel.

 

From my understanding the best fuel system for fuel injection should go something like tank, 100 micron filter, pump, 10 micron filter, feed line, y-block, fuel rails, y-block, regulator, return line, tank.

 

Why is that? I would have thought the fuel going to the motor would be.



That sounds like Aeromotives recommendations. Not going that route though thanks

 

Thats called parallel, and is overkill for 9/10 cars that run it

Basically, if you have a rail mounted regulator, you need two lines to the engine bay. If you want a single line, then the regulator must be rear mounted. LSx engines expect a static fuel pressure, so an AFPR with a vacuum port should be left open to atmo

Good practice is to filter fuel before and after the pump. For in-tank units, a pickup screen is all you get. In-line units can use an actual filter as listed. I wouldnt bother filtering the return side

 

Put the filter between pump and Y block. Now both lines are filtered.

 

I was under the assumption that you can use the AFPR as a "dead end" at the fuel rail? I could be wrong.

 

I picked it up from watching both Hot Rod Garage and Roadkill. The '55 Chevy with a Hemi and the '69 Crusher Camaro episodes.

 

Great show!

Maybe Ill just run the Vette setup this year and run two lines next year.

 

Draw it out. Im having a hard time visualizing that

 

Like this but the AFPR replaces where the gauge is on this.





I found this as well

 

Oh, yes if you put the regulator after the tee on the return side, it works fine. Brain fart, sorry

 

Like the first pic?

 

Like both pics

 

Good to know. I want to run one line to make it more clean. And you say to leave the vacuum port on the afpr open on an ls1 setup?

 

Deadhead style regulators are typically used in carbureted applications only. For EFI, there must be a return line from the regulator back to the tank.


The reasoning to have a "T" or "Y" near the tank is so you can run a regulator in the line back to the tank... or the Vette filter that does both, filter & regulate pressure.


The 4th gen F-body has a regulator in the tank that the return line is connected to. Without this end of line regulator, there would be no fuel pressure.

If you have a relatively mild build (under 700hp) then the return style Vette filter typically works best & saves a lot of money in fittings, components etc. No use making it more complicated than it need to be.

 

Sad that 700 is a mild build these days. I was just preparing for the future. I already have everything to run the vette filter so I may go with that. I just want to do the fuel system once. The end goal is a 402 or bigger with e 85 and a 200 shot.

 

You left out a MAJOR detail. E85 reduces the power number by about 25%. I would say 550rwhp on that Vette regulator system.


Also not sure what pump you intend to run, but you may come up way short there also.


The typical 255lph pump is good for about 550rwhp on gas or approx. 450rwhp on E85.


You need a plan before you start buying parts. It sounds like you need to do more research before you do anything else.
Feel free to PM me if you need any more info.

 

The stroker motor with a big shot is years down the road. Im not going to run a stroker with N20 with a 255

I already have everything to run the vette set up. Running a AFPR wouldnt be much work if I ran a true dead head system at this point, thats why I asked. This thread is just to see if the fuel system can be ran the way I described it since I couldnt find much information on it.

 

So you don't waste money doing things twice,
run a -8 supply up & a -6 return back from the rail with a front mounted regulator.

Use PTFE line for E85 & you should be good.

 

Why bother with E85 with a naturally aspirated engine?

 

More power (not like on a boosted motor), cheap, I can get it everywhere. And it smells great! Ive been running it since 06.