Surge Tanks And Factory Nylon Fuel Hose, How To Join?

[walkoau]

hi guys.

im about to install a surge tank and an 044 pump (external). since the factory fitted fuel line in an r34 are black nylon from filter in the engine bay all the way to the tank, im not sure about cutting and joining the lines. i was going to just use barb push in hose type with clamp, but im not sure if you can do this with the nylon lines, i just assumed they would be rubber type.

for those guys who have done this please give me some advise.....surely you shouldnt have to run complete new lines under the car.

thanks

Justin

[GeeTR]

[walkoau]

?????????

[GeeTR]

I'm just v.interested in other peoples answers!, as I've never heard (which doesn't mean a lot) of black nylon fuel lines...

Sure your not looking at a covering over the steel line? I wouldnt've thought Nylon is fuel resilient, nor capable of taking 5bar of pressure.

Edited February 9, 2008 by GeeTR

[Omurru]

nylon? you mean rubber I think? Anyway, either A: buy a surge tank with push on hose fittings or B: it's new hose time. One thing I personally don't be cheep on is fuel system stuff, I use all teflon braided lines on mine as they keep the fuel smell out of the boot where are rubber ones seep and you get a boot that smells like fuel.

You can get push on hose - screw on adapters but getting a size to suit the already existing fuel line might be a bit hard....

[GeeTR]

If you don't want the smell, you can find somewhere under the car to fit a custom flat surge tank, or you can fit one in the boot with hard lines, or you can fit in a sealed box.

Iv heard some people with Teflon say they can still smell it; so not a 100% solution.

If your asking on a forum I assume your piecing it all together yourself. In the boot, rip the carpet out, remove the f.tank access plate and check the lines where they enter. I'm not sure bout 34's but I reckon you'll work it all out if you get under there and have a look.

Report back on these strange fuel lines too.

Edited February 9, 2008 by GeeTR

[DCIEVE]

def no smell in mine since i got rid of rubber braid for teflon, used to stink the entire cabin out after sittting in the garage for a week but not even a hint of it now

to use rubber line you just need the hose tail fittings for the surge tank

[shanef]

std metal fuel lines are -6 OD

if u have AN fitings on ur surge tank, then just run normal braid/aeroquip rubber fuel hose with the AN fittings (-6) on the surge side and the earls hose clamps on the std line side

or if the surge is push on fittings, just use the aeroquip fuel hose (-6) and happy days

have a browse on www.summitracing.com search for earls or aeroquip

[walkoau]

nylon? you mean rubber I think? Anyway, either A: buy a surge tank with push on hose fittings or B: it's new hose time. One thing I personally don't be cheep on is fuel system stuff, I use all teflon braided lines on mine as they keep the fuel smell out of the boot where are rubber ones seep and you get a boot that smells like fuel.

You can get push on hose - screw on adapters but getting a size to suit the already existing fuel line might be a bit hard....

i unerstand everything you guys are saying, but your getting too indepth. first of all the car is an r34 it will only be used for drag. it maynot be regersted next time round, so im not worried about the legal side of things with surge tank and what type of line is used in the boot.

the surge tank has been made with 8mm hose tails, so no prob there. hoses push straight on to surge tank then clamp.....too easy.

here is the problem...ive taken off the inspection plate in the boot. worked out the pump line and fpr line. but they are factory fitted nylon or maybe teflon hoses all the way from the fuel filter in the engine bay to the tank...and at the tankthe hoses have a 90 degree plastic end and a push on type fitting that snaps into place.(i will take a pic tomorrow and post it up)

i know earlier skyline have rubber hoses but nissan have obviously upgraded this.

so my options are run whole new lines from fuel pressure regulator and supply filter back under the car to the surge tank, or find a way to conect rubber hose to the factory nylon hoses(which im hoping i can do via a barbed fitting, but not sure how that would go with the nylon/teflon hose)

you guys will get a better idea of what im saying when i put a pic up.

[Al]

Justin is correct the R34 fuel lines are nylon (or some other form of hard plastic type material). My mechanic just ran a new line from fuel reg to tank

[GeeTR]

Plastic fuel lines eh? trick.

Al - Outa interest, why'd your mechanic replace just the return? (FPR -> tank)

Like you say Justin, if you cant find a way to secure a normal EFI hose onto the plastic fuel line, you might have to replace it all

*ponders* "plastic fuel lines, something new everyday"

Edited February 9, 2008 by GeeTR

[walkoau]

Plastic fuel lines eh? trick.

Al - Outa interest, why'd your mechanic replace just the return? (FPR -> tank)

Like you say Justin, if you cant find a way to secure a normal EFI hose onto the plastic fuel line, you might have to replace it all

*ponders* "plastic fuel lines, something new everyday"

these plastic type fuel hoses have actually been around for a while. im pretty sure later model camrys and comodores have them also. most late model cars also have the plastic push on fitting either side of the fuel filter

i really dont want to run new hoses because the factory ones are soo neat, they have purpose bends in them and run perfectly in clamps along the floor pan.

if i put a full rubber hose in place of the originals there is no way it would look as neat and conformed to the body.

anyway for those who havent seen the new plastic.nylon/teflon??? type of hose i will post a pic up this arvo.

thanks

Justin

[DCIEVE]

hey mate, sounds like you best bet will be to pull out the std lines (assuming the plastic ones will hold there shape) take em to your local performance shop and get replica's made in ali fuel line. the ali stuff is extremely cheap, and you can either flare or solder the ends for screw on fittings

[walkoau]

hey mate, sounds like you best bet will be to pull out the std lines (assuming the plastic ones will hold there shape) take em to your local performance shop and get replica's made in ali fuel line. the ali stuff is extremely cheap, and you can either flare or solder the ends for screw on fittings

yeah thats a great idea. i will be having a talk to a few hose shops through the week and if there is no way to join this stuff the aluminium line bent to shape will be the way to go. i actually have a tube bender and pipe flaring kit at home, so i can do it all my self, theres just the alloy pipe for me to buy so it could work out to be very cost effective.

if anyone else has any other ideas on how to join this stuff, your input/ideas welcome.

thanks

Justin

[Al]

Plastic fuel lines eh? trick.

Al - Outa interest, why'd your mechanic replace just the return? (FPR -> tank)

Like you say Justin, if you cant find a way to secure a normal EFI hose onto the plastic fuel line, you might have to replace it all

*ponders* "plastic fuel lines, something new everyday"

I meant he replaced to line/s between from the boot to the engine bay. Not sure if it was just one line or both.