Using y block for AN return line
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Using y block for AN return line
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?
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?
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Re: Using y block for AN return line
It's best if the return line is filtered fuel.
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Re: Using y block for AN return line
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.
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Re: Using y block for AN return line
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
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.
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Re: Using y block for AN return line
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
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Re: Using y block for AN return line
Oh, yes if you put the regulator after the tee on the return side, it works fine. Brain fart, sorry
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Re: Using y block for AN return line
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.
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.
Last edited by Lonnie P; 02-21-2015 at 08:22 AM.
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Re: Using y block for AN return line
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.
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Re: Using y block for AN return line
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.
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.
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Re: Using y block for AN return line
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.
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.
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.
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Re: Using y block for AN return line
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.
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.
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Re: Using y block for AN return line
Why bother with E85 with a naturally aspirated engine?
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