LS Swap Fuel System Discussions
Thread Starter
Teching In
Joined: Jun 2018
Posts: 14
Likes: 0
LS Swap Fuel System Discussions My project is to install stock L99 in Nova 1972. I have two options to go with for the fuel system:
First system is the return fuel system.
Tank-> PreFilter-> Pump-> PostFilter-> Rails -> RegulatorValve -> Tank.
The parts will be used are below:
1. Fuel filter 100 microns (Brand: FiTech / Part#: 80111)
2. Inline high pressure fuel pump 255 lph (Brand: FiTech / Part#: 50101)
3. Fuel filter 30 microns (Brand: FiTech / Part#: 80113)
4. Fuel rail EFI (Brand: Holley / Part#: 850013)
5. Pressure Regulator Valve for EFI 35-75 psi (Brand:FiTech / Part#: 44020)
Second system I will call it semi-returnless fuel system.
Tank-> PreFilter-> Pump-> PostFilter-> RegulatorValve(2output)-> 1.Rails.2.tank
The parts will be used are below:
1. Fuel filter 100 microns (Brand: FiTech / Part#: 80111)
2. Inline high pressure fuel pump 255 lph (Brand: FiTech / Part#: 50101)
3. Fuel filter 30 microns (Brand: FiTech / Part#: 80113)
4. C5 1999 Pressure Regulator Valve
5. Stock L99 fuel rails
General questions:
A. What are the cons and pros for each system?
B. Should I use AN6 or AN8? And why?
C. Should I install the fuel rails in parallel or series?
Return fuel system questions:
A. There is Pressure Regulator Valves comes with vacuum line like the one upside. Do I need that vacuum line to be connected to intake intake manifold? what is the required pressure?
B. According to what I have seen. They are plugging the output of the Pressure Regulator Valve. Is that right? Or is there a valve that is coming with only one inlet and return line?
Semi-returnless fuel system questions:
A.Do I need to install a Fuel Pulse Damper?
First system is the return fuel system.
Tank-> PreFilter-> Pump-> PostFilter-> Rails -> RegulatorValve -> Tank.
The parts will be used are below:
1. Fuel filter 100 microns (Brand: FiTech / Part#: 80111)
2. Inline high pressure fuel pump 255 lph (Brand: FiTech / Part#: 50101)
3. Fuel filter 30 microns (Brand: FiTech / Part#: 80113)
4. Fuel rail EFI (Brand: Holley / Part#: 850013)
5. Pressure Regulator Valve for EFI 35-75 psi (Brand:FiTech / Part#: 44020)
Second system I will call it semi-returnless fuel system.
Tank-> PreFilter-> Pump-> PostFilter-> RegulatorValve(2output)-> 1.Rails.2.tank
The parts will be used are below:
1. Fuel filter 100 microns (Brand: FiTech / Part#: 80111)
2. Inline high pressure fuel pump 255 lph (Brand: FiTech / Part#: 50101)
3. Fuel filter 30 microns (Brand: FiTech / Part#: 80113)
4. C5 1999 Pressure Regulator Valve
5. Stock L99 fuel rails
General questions:
A. What are the cons and pros for each system?
B. Should I use AN6 or AN8? And why?
C. Should I install the fuel rails in parallel or series?
Return fuel system questions:
A. There is Pressure Regulator Valves comes with vacuum line like the one upside. Do I need that vacuum line to be connected to intake intake manifold? what is the required pressure?
B. According to what I have seen. They are plugging the output of the Pressure Regulator Valve. Is that right? Or is there a valve that is coming with only one inlet and return line?
Semi-returnless fuel system questions:
A.Do I need to install a Fuel Pulse Damper?
On The Tree
Joined: Sep 2015
Posts: 145
Likes: 0
Ricks vapor works tank and your choice of OE pump, Camaro SS, ZL1, or CTSV. One fuel line to front (returnless) as it is designed to return inside of tank......so less plumbing, OE pump you can depend on and find anywhere, and less fittings and lines!!
TECH Senior Member
Joined: Jun 2016
Posts: 22,293
Likes: 3,617
From: Central Cal.
Originally Posted by 8.Lug;19, then974732
Just do whatever came stock for your engine.
Like 461Rat says, Ricks Vaporworx is the way to go. There are others to use (Holley, Tanks Inc) and while they are good, the vaporworxs model is so much simpler (less fittings and such).
