Mazda Rotary Club

Cars by Model Type => 3rd generation RX-7's => Topic started by: Jono FD3 on April 11, 2011, 11:22:30 PM

Title: Braided Fuel lines....
Post by: Jono FD3 on April 11, 2011, 11:22:30 PM
Where is the best place to get some stainless braided hose for the fuel lines and what should I get, as on the bay there is a choice of Teflon or nitril hose?? Also what size... 6 or 8mm??

Cheers
Jono
Title: Braided Fuel lines....
Post by: Prof on April 12, 2011, 07:34:16 AM
Quote from: Jono FD3;755523Where is the best place to get some stainless braided hose for the fuel lines and what should I get, as on the bay there is a choice of Teflon or nitril hose?? Also what size... 6 or 8mm??
 
Cheers
Jono

I used a mix of Torques and Earls (pricier), but I will say Earls line is a better quality - had some cheaper braided off ebay and it was prone to splitting inside the braid.
 
Best not to economize on fuel lines ;)
Title: Braided Fuel lines....
Post by: Aubec on April 12, 2011, 03:10:08 PM
-6 hose, don\'t need teflon for fuel.

I bought all my bits from Summit Racing in the US.
Title: Braided Fuel lines....
Post by: Jono FD3 on April 13, 2011, 12:00:39 AM
sweet, and what sort of length would I need??
Jono
Title: Braided Fuel lines....
Post by: Aubec on April 13, 2011, 12:11:46 AM
Depends on what you are plumbing (primary, secondary?), whether you go serial or parallel, where you mount your FPR, whether you are going firewall forward or back to the fuel tank, whether you will be installing a swirl pot etc. etc. etc.

I ordered 3m I think, and have some left after doing firewall forward primary, secondary in parallel and with the FPR mounted on the firewall near the ABS.  Its the hose fittings that are the killer cost if you go the AN route, not the lines!
Title: Braided Fuel lines....
Post by: AtomicRex on April 13, 2011, 12:11:56 AM
Are these for running inside the car?
 
Standard braided hose is porous...and as such will give off fuel vapour!  This is dangerous!!
 
If you need hose and fittings....drop me a line with the items you need, I can get some pretty good prices on Goodridge items.
Title: Braided Fuel lines....
Post by: Jono FD3 on April 13, 2011, 06:15:38 PM
just replacing the main fuel lines from the tank forward, and pipes will be run outside the car in the stock position!
Title: Braided Fuel lines....
Post by: Aubec on April 13, 2011, 06:56:55 PM
Atomic - the nitrile hose does let the smell of fuel through after a while, so I agree I sure wouldn\'t use in the ....pit, but pretty sure it can\'t be dangerous!

The hose is still fuel-rated which it would not be if it leaked ignitable fumes surely?  If so, then how can it be legal to sell as fuel hose?

Other than the braid, surely it\'s no different from the hose we\'d use as stock fuel lines in the engine bay?
Title: Braided Fuel lines....
Post by: AtomicRex on April 14, 2011, 09:57:53 AM
Depending on the scrutineer of the day, any standard 200 series hose can fail a car.  It is designed for under the car or in the engine bay.  Goodridge now do a hose that is perfectly sealed.  Standard hose is a little like Gore-Tex it obviously wont let the water molecules in but the smaller moisture it will let through.
 
You can always smell when someone has a swirl pot in the pot....the fuel vapour is very strong!  As for dangerous....fuel vapour left in the sun on a summers day...Petrol tanks have been known to explode....so although I imagine that you would have had to really annoy lady luck...its worth while taking precautions with!
Title: Braided Fuel lines....
Post by: Jono FD3 on April 14, 2011, 12:00:42 PM
Anyway.... what length do I need to replace the lines from the tank to the fuel rail?
Title: Braided Fuel lines....
Post by: AtomicRex on April 14, 2011, 12:09:43 PM
Sorry for the digress
 
Why do you want to spend the monies fitting braided lines the length of the car?  Why not do it in Copper?  Or get some steel hard lines?  I dont personally recommend using braided line over the length of the car as it will have a slight pressure loss.
Title: Braided Fuel lines....
Post by: SiH on April 14, 2011, 12:12:17 PM
It totally depends dude - where is the FPR mounted?
IIRC I used about 2m or so for each run, so 4m. I\'d err on the side of caution and get 6 so you have 1m spare for each run though. Mine were to and froma  swirl pot where the carbon canister is so not straight to the tank, so it all got a bit confused lengthwise.

I use a mixture of JEGS and Torques hose and fittings, both seem good.
If I could have, I would ahve run solid lines tbh.
Title: Braided Fuel lines....
Post by: Jono FD3 on April 14, 2011, 03:44:56 PM
mmmm Might look at stainless pipe then, and use the braided where the stock rubber ones are!
Title: Braided Fuel lines....
Post by: AtomicRex on April 14, 2011, 04:18:55 PM
If you are interested in Aluminium hard pipes I can supply these at £2.50 per metre! inc VAT  The fittings arent that expensive either.  You would need to a minimum of 4 metres though.
Title: Braided Fuel lines....
Post by: Aubec on April 14, 2011, 05:34:49 PM
Or check with your dealer what the stock pipes cost to replace (assuming they are corroded and you are not looking to use wider pipes?).  Hard lines are the way to go.

I got a very pleasant surprise when I was replacing clutch hard lines - cost me like £8 or something for each OEM line- fuel lines are just a bit longer and a bit wider, so you might get a pleasant surprise.
Title: Braided Fuel lines....
Post by: SiH on April 14, 2011, 08:19:34 PM
Yeah, if you\'re going hard line you may as well use the stock for the hassle it saves you :)

Hard line is so much neater and cleaner looking than braided.
Title: Braided Fuel lines....
Post by: AtomicRex on April 14, 2011, 08:54:34 PM
The retail on the OE pipes, this is the US price though..so probably the same in £, as the conversion seems to be 1:1!
 
There are 6 hard pipes
$65 and $32
$61 and $32
$49 and $25
 
So you\'d be better off looking at getting some second hand ones.
Title: Braided Fuel lines....
Post by: karl_tate on April 14, 2011, 09:16:25 PM
lol all them post\'s, and its come back to one simple question, what is the reason you want to change the lines jono?? haha
Title: Braided Fuel lines....
Post by: Jono FD3 on April 15, 2011, 03:02:36 AM
Corrosion on the tank side ;) MOT man picked up on it and I\'ve seen a few FD\'s suffer from pipe failure and catch fire, so thought that replacing them would be a good idea! LOL
I can make stainless lines for less than that price Atomic, got a local supplier I can get that from in any length I want as they have it in 6m runs of the stuff, and then I won\'t have to worry about it ever again ;)

Think that\'s the rought I\'ll take then..... what is the internal thickness of the stock metal pipe guys, is it 5mm??
Jono