Replacing rubber & hose clips with braided fixed fittings?

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moppit
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Replacing rubber & hose clips with braided fixed fittings?

Post by moppit »

Gents,

Noob question on fuel plumbing...

I am getting a bit paranoid about the potential for fuel leaks in the engine bay and my current arrangement with rubber hose and hose clips seems a bit too risky and looks er,..well rubbish.

I've got 8mm copper pipe up to the engine bay via a malpassi filter king to an eddy 500. What type of fittings would help tidy everything up? Is it AN6 & braided hose or is there a common metric standard? Trying to avoid hose clips and would rather everything done up with spanners.

My eddy has a push on hose fitting. Can I replace this with a screw on fitting?

Road use only..engine is a 3.9 dynoed at 258bhp if that matters for fuel flow etc

Any tips or pointers appreciated..


NG TC V8 JE rebuilt 3.9, Edelbrock 500, Eddy manifold, Typhoon cam, ported heads

stevieturbo
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Re: Replacing rubber & hose clips with braided fixed fittings?

Post by stevieturbo »

Absolutely nothing wrong with good quality hose and correct clips. I'd far sooner have that than some bodged fittings and pipe.

AN6 is generally regarded as 3/8", so around 9.8mm so wont easily be compatible with 8mm pipe anyway.

And it seems a lot of nitrile rubber hose with stainless overbraid...is far worse quality than even cheap rubber hose. I've heard of many people report fuel pishing out everywhere after only a year or two..and because of the overbraid you can never see the condition of the hose below.

In fact, nitrile rubber with stainless overbraid would probably be the last hose I'd ever recommend to anyone to use
9.85 @ 144.75mph
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http://www.youtube.com/watch?v=XgWRCDtiTQ0

unstable load
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Re: Replacing rubber & hose clips with braided fixed fittings?

Post by unstable load »

If you are prepared to pay for Aeroquip fuel specific line, then by all means go for it, but it you are going to go for the Aeroquip look-alike stuff, then rather save yourself the misery and cost of replacing it all like Stevieturbo says and get good quality rubber lines and the spring type clamps that will give an OEM look and will actually work, like these.
http://kschina.en.hisupplier.com/produc ... lamps.html
Cheers,
John

moppit
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Re: Replacing rubber & hose clips with braided fixed fittings?

Post by moppit »

Excellent feedback. Thanks to the both of you. Will hunt out spring clips.

My Malpassi is one of the glass bowl affairs - should I at least be replacing that with an alloy bowl for the sake of safety?
NG TC V8 JE rebuilt 3.9, Edelbrock 500, Eddy manifold, Typhoon cam, ported heads

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Ian Anderson
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Re: Replacing rubber & hose clips with braided fixed fittings?

Post by Ian Anderson »

I believe one of our members from Holland, JP, is a merchant on fuel hose and can advise accordingly.

Ian
Owner of an "On the Road" GT40 Replica by DAX powered by 3.9Hotwre Efi, worked over by DJ Motors. EFi Working but still does some kangaroo at low revs (Damn the speed limits) In to paint shop 18/03/08.

stevieturbo
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Re: Replacing rubber & hose clips with braided fixed fittings?

Post by stevieturbo »

Spring clamps might be suitable...but they can be a pain.

Just use proper screw type clamps for such hose

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9.85 @ 144.75mph
202mph standing mile
http://www.youtube.com/watch?v=XgWRCDtiTQ0

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SimpleSimon
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Re: Replacing rubber & hose clips with braided fixed fittings?

Post by SimpleSimon »

Nothing wrong with conventional 5/16 8mm hose and clips like in previous picture , over spec and go for R9 Ethanol proof hose but go branded nothing else will do Codan,Conti-Tech, Gates Barricade etc (avoid Ebay R9 unbranded) https://www.carbuildersolutions.com/uk/rubber-fuel-hose or http://www.flexiducting.co.uk/products/ ... fuel-hose/ poor quality EFI 8mm hosing is a TVR bugbear as many RV8 fitted models use lots of it 8-) many are aware of this issue now however
TVR Chimaera RV8 Mods & Megasquirt

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Re: Replacing rubber & hose clips with braided fixed fittings?

Post by Seight-V8 »

just replaced all the fuel hose on my westfield seight, due to it being 20 years old....and modern fuels can degrade older pipe quicker.

Be sure you buy good quality R9 fuel pipe, there are lots of lower spec & fake fuel pipes about.

properly identified R9 Goodrich or continental is not cheap, but like you say, not worth the fuel leaks.

More important is to match fuel pipe to the size of the matching pipe or union, and good quality fuel clips not jubilee ones, but ones that make 100% contact, like in the pics from a previous post.

Think overbraid is overkill unless its any area that can rub or has abrasion near it, but its a personal choice maybe.

Plenty of info on google about R9 fuel pipe and good sized clips......just be careful on ebay.....bought mine from https://www.brickwerks.co.uk/

good luck.
scott

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