Fuel Delivery Questions
Thread Starter
Teching In
Joined: Apr 2005
Posts: 4
Likes: 0
From: Mississippi
Fuel Delivery Questions Hi - I'm a new member and I'm sure this is posted somewhere here but the information seems so vast.
I am putting an '02 LS1/4L60E (from a WS6 Trans Am) into a 1987 Jeep Wrangler. I have the mechanical installation complete and I am now turning to the fuel delivery system. I did research this on the front end of this project and thought I had it figured out with S&P modified fuel rail to get the return line to the tank. Somewhere in the middle of this project the plan got cloudy when I discovered that the Corvette fuel filter/regulator will provide for the return line and allow me to retain the factory single line fuel rail. Does anyone have input as to which system works best? I have spoken with John at Speartech who has been a tremendous help but I feel guilty asking him every step of the way. I have the factory Jeep tank (no baffle) and the '02 Trans Am tank both available - the Jeep also was plumbed from the factory with a supply and return the entire length of the frame. I think I'm down to making a decision as to which way to go, dual or single fuel rail fittings, and the necessary connections. Any input would be greatly appreciated - I built cars all of my life but this is my first EFI project.
Thanks,
Clay
I am putting an '02 LS1/4L60E (from a WS6 Trans Am) into a 1987 Jeep Wrangler. I have the mechanical installation complete and I am now turning to the fuel delivery system. I did research this on the front end of this project and thought I had it figured out with S&P modified fuel rail to get the return line to the tank. Somewhere in the middle of this project the plan got cloudy when I discovered that the Corvette fuel filter/regulator will provide for the return line and allow me to retain the factory single line fuel rail. Does anyone have input as to which system works best? I have spoken with John at Speartech who has been a tremendous help but I feel guilty asking him every step of the way. I have the factory Jeep tank (no baffle) and the '02 Trans Am tank both available - the Jeep also was plumbed from the factory with a supply and return the entire length of the frame. I think I'm down to making a decision as to which way to go, dual or single fuel rail fittings, and the necessary connections. Any input would be greatly appreciated - I built cars all of my life but this is my first EFI project.
Thanks,
Clay
Originally Posted by clayboy0311
Hi - I'm a new member and I'm sure this is posted somewhere here but the information seems so vast.
I am putting an '02 LS1/4L60E (from a WS6 Trans Am) into a 1987 Jeep Wrangler. I have the mechanical installation complete and I am now turning to the fuel delivery system. I did research this on the front end of this project and thought I had it figured out with S&P modified fuel rail to get the return line to the tank. Somewhere in the middle of this project the plan got cloudy when I discovered that the Corvette fuel filter/regulator will provide for the return line and allow me to retain the factory single line fuel rail. Does anyone have input as to which system works best? I have spoken with John at Speartech who has been a tremendous help but I feel guilty asking him every step of the way. I have the factory Jeep tank (no baffle) and the '02 Trans Am tank both available - the Jeep also was plumbed from the factory with a supply and return the entire length of the frame. I think I'm down to making a decision as to which way to go, dual or single fuel rail fittings, and the necessary connections. Any input would be greatly appreciated - I built cars all of my life but this is my first EFI project.
Thanks,
Clay
I am putting an '02 LS1/4L60E (from a WS6 Trans Am) into a 1987 Jeep Wrangler. I have the mechanical installation complete and I am now turning to the fuel delivery system. I did research this on the front end of this project and thought I had it figured out with S&P modified fuel rail to get the return line to the tank. Somewhere in the middle of this project the plan got cloudy when I discovered that the Corvette fuel filter/regulator will provide for the return line and allow me to retain the factory single line fuel rail. Does anyone have input as to which system works best? I have spoken with John at Speartech who has been a tremendous help but I feel guilty asking him every step of the way. I have the factory Jeep tank (no baffle) and the '02 Trans Am tank both available - the Jeep also was plumbed from the factory with a supply and return the entire length of the frame. I think I'm down to making a decision as to which way to go, dual or single fuel rail fittings, and the necessary connections. Any input would be greatly appreciated - I built cars all of my life but this is my first EFI project.
Thanks,
Clay
you have a couple options... you can do whatever one is easiest for you. or what you think looks neat... ect..
these are my top two choices
- you can cut the return line short on the frame rail of the car... connect the return to the vette regulator there, and the stock feed from the regulator goes up front.. then you connect that feed to the stock rail.
- you could keep your OEM fuel lines all the way, but underhood, put a aftermarket regulator. this regulator hooks up to the feed and return, and has one line going out to the fuel rail.
heres some threads on the subject you might find useful:
https://ls1tech.com/forums/showthrea...light=mrdude_1
https://ls1tech.com/forums/showthrea...light=mrdude_1
https://ls1tech.com/forums/showthrea...highlight=fuel
Both the above are good. I would look into the Vette filter and do this in your case. if you use the f body tank, it too has a regulater in the tank. you can use it with a y block 2 feet after the tank.
Thread Starter
Teching In
Joined: Apr 2005
Posts: 4
Likes: 0
From: Mississippi
Thanks guys for the assistance. I am leaning towards the 97-98 Vette filter/regulator mounted in the engine compartment (only because I have room and future maintenance will be easier - return line is already there). Any input on this or should I mount it closer to the fuel cell? I do have one burning question that someone may be able to help me with. The factory Jeep tank is plastic and does not have a baffle in it - if I simply add an in tank electric pump to the existing pickup tube won't I encounter a fuel starvation situation when the fuel level gets low in the tank? I have the '02 T/A tank with the pump still in it but it is going to tak esome heavy modification to use that fuel cell. My preference would be to somehow use the Jeep tank and still have everything function properly and reliable. I am a bit puzzled because the tank I have is from a fuel injected Jeep Wrangler (95) - I expected a baffle but when I pulled the sending unit there wasn't one. Again, thanks for the help.
Clay
Clay
well, i am pretty sure it is a 99- and up vette, not the 97-98. 97-98 vette had a return line on the fuel rail and reulator was on that. that is the setup we used on a 69 camaro swap that i did before i knew about the filter.
i am not sure if the line is big enough on your wrangler to handle the ls1. but, i am not sure.
as for the tank you might try putting some of the foam like they use in fuel cells in your tank. just cut a hole in the foam where the pump drops in. never done this, just a thought.
i am not sure if the line is big enough on your wrangler to handle the ls1. but, i am not sure.
as for the tank you might try putting some of the foam like they use in fuel cells in your tank. just cut a hole in the foam where the pump drops in. never done this, just a thought.
Originally Posted by clayboy0311
Thanks guys for the assistance. I am leaning towards the 97-98 Vette filter/regulator mounted in the engine compartment (only because I have room and future maintenance will be easier - return line is already there). Any input on this or should I mount it closer to the fuel cell? I do have one burning question that someone may be able to help me with. The factory Jeep tank is plastic and does not have a baffle in it - if I simply add an in tank electric pump to the existing pickup tube won't I encounter a fuel starvation situation when the fuel level gets low in the tank? I have the '02 T/A tank with the pump still in it but it is going to tak esome heavy modification to use that fuel cell. My preference would be to somehow use the Jeep tank and still have everything function properly and reliable. I am a bit puzzled because the tank I have is from a fuel injected Jeep Wrangler (95) - I expected a baffle but when I pulled the sending unit there wasn't one. Again, thanks for the help.
Clay
Clay
i saw this setup on a sand rail on here... it was kinda intresting.
https://ls1tech.com/forums/showthrea...ight=fuel+tank
basicly it works like this:
one non pressure specific pump goes from your tank, into this external sump, keeping it full... the external sump feeds the engine fuel pump.. even if the gas tank starves the non-pressure pump, the engines fuel pump still has fuel...
if you are going offroading with your jeep, its not a bad idea....
Thread Starter
Teching In
Joined: Apr 2005
Posts: 4
Likes: 0
From: Mississippi
Thanks again for the input. ALL UC2: You are exactly right right - it is a '99. I knew what I was thinking just wrote it incorrectly. This whole time I have been planning on dual line system like the 97-97 vette then at the last minute I jumped ship to the single line system. Only have teh tank to contend with now and I should be in good shape. Mr_Dude1: Thanks for your help - I'll post some photos when the install is complete - it is really shaping up into a clean conversion.
