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Fuel Lines for EFI Engine Conversion

General Tech Talk

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Fuel Lines for EFI Engine Conversion

Post by Struddy »

G'Day All,

Currently doing a 3RZ conversion to my 4Runner, have done a search but didn't find what I am looking for.

I am after how people have gone about with high pressure fuel lines when carrying out a conversion to EFI.

I am thinking flexible fuel hose for the return and evap, and using flexible fuel hose with crimped ends for the high pressure line. Is this how most people have done it or do you use solid lines.

Also how have you gone mounting it to the chassis.

Thanks in advance.

Struddy
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Post by hiluxmad »

use the original solid lines that are mounted to chassis and change the rubber lines at each end for suitable fuel injection rated stuff.
if you need an extra line for evap etc use rigid line same as original can buy it from repco etc im pretty sure or VPW sell it on line.
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Post by Struddy »

Thanks for the reply, should have mentioned earlier I also need to swap sides in the engine bay.

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Post by PJ.zook »

For the evap etc lines i used the original bundy pipe that went down the chassis rails from the original carby motor.
For the feed and return lines, i used flexy hose that was rated for fuel injection.
Has worked out great, dont see a problem with doing it in a 4skin.
Dont necessarily need to use crimped ends or anything, my fuel rail feed had a simple short piece of pipe which i slid the hose over and used a worm clamp. The return line didnt even have clamps from factory in the car i ripped the motor out of.
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Post by pongo »

you should be able to use nylon air brake hose from a truck. Dunno how easy it for you to get a hold of though. Diesel resitant, Not sure about petrol.

Best part is you can use proper flange/nut joiners or simple push in fittings. No more hose clamps to come loose
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Post by mhgill »

in SA its LEGAL to run flexible HP hose all the way to the tank. Metal lines not req.

(this was a few years ago)
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Post by Struddy »

Thanks for the suggestions guys, keep them coming.

I have worked out I will also be running a VL external EFI fuel pump.

Struddy
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