HarrisonTX Posted September 12, 2005 Share Posted September 12, 2005 Who has rerouted the fuel lines like the JTR book shows? Is this really nessecary? couldnt i just make a heat sheild? Quote Link to comment Share on other sites More sharing options...
Phantom Posted September 12, 2005 Share Posted September 12, 2005 And you want to leave your fuel lines close to heat so that you can set yourself up for vapor lock - why? In my case I had two reasons for a fuel line reroute, 1) the lines would have literally been touching the passenger side exhaust header, and 2) the LS1 fuel rail inlet was at the back and on the drivers side so it was logical to come up and across the firewall. On a carburated car I can see why you'd want something closer to the stock Nissan routing but heat and fuel just aren't compatible. Quote Link to comment Share on other sites More sharing options...
jnjdragracing Posted September 13, 2005 Share Posted September 13, 2005 I would re-route, we did for other reasons, running 1/2 fuel in and a 3/8 return. Be sure to use aluminum fuel line. It is not hard to do, and it is better. I ran 3 lines total, 2 1/2 inch and 1 3/8. ou will need a flaring tool and tube seal nuts and ferrels. Be sure to tape up the fuel line before running to keep trash out of the lines. john Who has rerouted the fuel lines like the JTR book shows?Is this really nessecary? couldnt i just make a heat sheild? Quote Link to comment Share on other sites More sharing options...
wheelman Posted September 13, 2005 Share Posted September 13, 2005 I replaced mine with 3/8" feed and 5/16" return but routed them down the tunnel in basically the same location as the stock lines until they entered the engine bay then re-routed along the firewall to feed my LT1 fuel rails. The connection points are at the back of the engine. I used stainless brake line from NAPA with short lengths of high pressure rubber at each end with AN fittings. I'd replace your stock lines to provide more capacity and eliminate the old corroded lines. Wheelman Quote Link to comment Share on other sites More sharing options...
Georgia Flash Posted September 13, 2005 Share Posted September 13, 2005 For now I have left mine as is on my 76 280Z. However, I may run new lines in the near future. I have to do my homework first. Also another important thing to note is that the 240Z and the 280Z have the fuel lines running in two different locations. The 240 from my understanding has the lines running down the transmission tunnel while the 280 has the lines running along side the passenger side frame rail. Quote Link to comment Share on other sites More sharing options...
Guest tony78_280z Posted September 13, 2005 Share Posted September 13, 2005 from the mechanical pump my lines run the motor's stock lines (up behind the alternator) from there I sliced the aluminum lines and run rubber into my holley carb. I will probably route something else in the future, but I got alot of other projects to tackle first. Quote Link to comment Share on other sites More sharing options...
Guest iskone Posted September 13, 2005 Share Posted September 13, 2005 I might be way off here but I don't think one has to flare anything. Why doesn't anyone use a Swagelock style fittings http://www.swagelok.com/? I work in the research science feild and we use them on everything everywhere and so do the rest of the labs around the world, hell our parent company even manufacturs them. Come to think of it I've used them in my 280 to fix some bad lines for a few years now. Isk Quote Link to comment Share on other sites More sharing options...
getZ Posted September 13, 2005 Share Posted September 13, 2005 Swagelock stuff is great but they use their own thread size and it is expensive. Plus you can only find it at industrial supply places. They do have a few pipe thread adapters but try pricing a tap and die set for swagelock. Of course if you have access to it for free.......well that's another story, otherwise it costs more that AN style fittings. Quote Link to comment Share on other sites More sharing options...
HarrisonTX Posted September 13, 2005 Author Share Posted September 13, 2005 from the mechanical pump my lines run the motor's stock lines (up behind the alternator) from there I sliced the aluminum lines and run rubber into my holley carb. I will probably route something else in the future, but I got alot of other projects to tackle first. Man, i went to your site in your signature, very good tips, its added to my list Quote Link to comment Share on other sites More sharing options...
The Rototiller Posted November 3, 2005 Share Posted November 3, 2005 it looks like my 1971 240z has 3 fuel lines. one big one and 2 smaller ones. do i need all 3? i am planning on running an edelbrock carb on my 350 V8. which ones can i get rid of. pics too if you have them thanks Quote Link to comment Share on other sites More sharing options...
Pop N Wood Posted November 3, 2005 Share Posted November 3, 2005 Isn't the third one actually a vent for the gas tank? Look and see where it goes. It should go to a vacuum operated switch so that the gas tank overflow is vented to the crankcase when the engine is off, and the intake manifold when the engine is running. At least that is how I remember it. Quote Link to comment Share on other sites More sharing options...
BrandonsZ Posted November 3, 2005 Share Posted November 3, 2005 I have ceramic coated headers, that cuts the heat a little, but I left the lines in the stock location, I did move the pass side brake line to on top of the rail instead of on the side. I made a shield but took it off 'cause I didn't like how it looked. I am running 15+ psi from an external "Carter" pump to the regulator in front of the tower on the pass side with stock lines then regulated down to 5.5 psi for the carb. That way if I drop a few psi in the 5/16" lines, it won't matter. I have WOT for a good 5 seconds in 5th and no lack of fuel. No vapor lock because where the heat is, there is no suction, only 15+ psi of pressure, not a worry. And the pump is as low as it can go. Noisey though. Quote Link to comment Share on other sites More sharing options...
pparaska Posted November 3, 2005 Share Posted November 3, 2005 I wanted to run another line for fuel delivery and use the stock 3/8" line on my 240Z for a return line for EFI. The stock lines on the 240Z (brake and fuel) run up in the tunnel. With the Tremec 5spd, this gets very tight. I ran the new 1/2" AL line along my frame rail (subframe connector) below the floor, on the inside of the frame rail. Quote Link to comment Share on other sites More sharing options...
The Rototiller Posted November 3, 2005 Share Posted November 3, 2005 there is no return line on my edelbrock carb (1406 model) i just need to make sure that i regulate fuel pressure down to 6psi. i guess on my 240z, the larger line is the fuel inlet and the other two smaller ones are fuel return and vent line. i should be able to remove the two smaller lines. with that in mind, what would be the best way to vent the gas tank? vented gas cap? thanks Quote Link to comment Share on other sites More sharing options...
HarrisonTX Posted November 4, 2005 Author Share Posted November 4, 2005 This guy used the search technique, instead of making a new post... Cool roto Quote Link to comment Share on other sites More sharing options...
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