opinions on replacement fuel hoses

[spitfire4v8]

Hi all .. tapping the great PH knowledge base.
What are people fitting these days when replacing their fuel hoses? I'm a big believer in not covering them up in braiding, but what materials are people using these days as an upgrade over more traditional rubber hoses? I don't really know much about fuel hoses .. I've been quite happy fitting standard rubber fuel hose from the local motor factor .. but with perishing hoses and fuel changes being forefront in our minds what are the best hose materials to be using these days?
cheers all.

[scotty_d]

I went for a PTFE hose unfortunately they are brade hose, my view on this they are a service item and should be changed out as per the manufacture's spec as . I used goodridge hoses this time. If you look at how long standard rubber original ones last, approx 10 years these should be at the very least on par.

Edited by scotty_d on Friday 9th January 09:50

[Engineer1949]

I use 7840 marine fuel hose it has a very good spec including it has to survive 30 mins of naked flame it is approved by the coast gaurd and other agencies not everybodys first choice largely because it is a marine product.

John

[Colin RedGriff]

I've used nitrile rubber fuel hose. It's un braided but I have added a heat insulating sleeve to protect it from the manifolds

[Chuffmeister]

Engineer1949 said:

I use 7840 marine fuel hose it has a very good spec including it has to survive 30 mins of naked flame it is approved by the coast gaurd and other agencies not everybodys first choice largely because it is a marine product.

John

Thats interesting John. Theres a marine place not far from me.

[ch427]

Just replaced some of mine with the below, cant see the point in expensive braided hoses you cant really see the condition of even if they look nice. Ive never actually seen a good quality modern hose perish.

http://www.ebay.co.uk/itm/7-6mm-5-16-8mm-R9-FUEL-I...

[rigga]

Got a set of replacement hoses off Jon zubek waiting to fit.

http://www.pistonheads.com/classifieds/parts-and-p...

[estutjaweh]

rigga said:

Got a set of replacement hoses off Jon zubek waiting to fit.

If you are going to use braided hoses, don't forget to regularly check that they haven't moved due to engine vibrations. I forgot to check initially and my braided fuel hoses eventually wore through a brake line. I must say it was interesting stopping at the traffic lights to an almightily cloud of smoke out of the bonnet - which turned out to be Dot4 evaporating off the hot manifolds.

You have been warned!

[gavgavgav]

I'm just going through junking the expensive braided hose hat is about 4 years old, brought from a good supplier, but the hose developed a leak after the fuel pump.

Done a lot of reading for the web, and the important factor is the standard that the hose meets. To cut a long story short I've gone for SAEJ30R9 which is resistant to ethanol in modern fuels.

Good read here: http://www.volksbolts.com/faq/fuelhose.htm

Link above is the seller I've bought my replacement hose from too. Also use proper fuel hose clips rather than Jubilee.

[V8 Fettler]

If the car is unused for extended periods then use bio fuel hose to resist the perils of ethanol.

[spitfire4v8]

I'm struggling to find some definitive answers online .. seems neoprene or nitrile are the modern rubbers of choice, neoprene having better cold weather flexibility it seems? Common advice (in the absence of any definitive impartial testing) just seems to go with a known name and change it often! Common sense then ..

[DJR 7]

I used Samco pro fuel hose, they take 4-5 weeks to make.
Ordered mine from Bailey Motorsport

D

[Chuffmeister]

I used Gates

[Plan B]

I suggest you read this USA article http://www.hotrod.com/how-to/engine/hrdp-1101-perf... on fuel hoses. It's a bit of a long read but stay with it to the end. At the moment many of us are using r9 spec hoses to cope with ethanol weakening of fuel hoses. In the USA the ethanol content in their fuel is fast rising (we are around 5% but in USA it's often greater than 15%) and R9 (and even the higher spec R12) based hoses are seemingly not holding up to the job. With the prospect of the ethanol % rising at our pumps in the UK the prudent choice seems to me to use teflon (PTFE) lined hoses. Whether these are braided or not is perhaps less of an issue when it is claimed these hoses are fit and forget - even in high engine bay temp use cases. Bottom line is virtually all new cars produced in the USA fit PTFE fuel hoses. Anyhow have a read and decide.......

[spitfire4v8]

Aren't they hoses that require new end fittings (an/jic etc?) .. how does that fit to an alloy spigot on the fuel tank, or the pump outlet I wonder?