Hi folks ,
Had a hose fail on my own GTD in June, (filter to carb) all the hoses were renewed 2 years ago, as one hose had failed I decided to change all the fuel hoses to be safe and sure.
Within just 24 hours the car smelled badly of petrol, on sniffing the hoses it was obvious there was an issue.
I had in stock sufficient hoes and fittings of an alternate top quality supplier so I made up another full set of hoses with new fittings etc, 24 hours later same overpowering petrol smell in car and garage, the car was undrivable, the hose and fittings I used were from top quality sources that I have used on previous carbuilds with no problems at all.
I then received a call from a customer who had had fuel hose leak, this hose was 5 years old, same hose,filter to carb, the hose that is subject to engine torque shifting.
On reading various threads on other forums and research into modern roadside retail fuels it became obvious that hoses sold as fuel hose is not resistant to modern fuels containing ethanol , a chemist has explained to me the acidic attack such fuels have on rubber fuel conponents is destructive and will lead to leaks and possible fire disasters.
So after twice renewing the fuel system at a cost in excess off £500 I had a car which was a fire risk and undrivable.
My research lead to a Teflon fuel hose sytem made by BMRS, brown and millers racing solutions, the UK technical guy has a gt40 in build so our conversations were fully understood by both of us.
I decided to go with the BMRS system, it is sold by agents, I got mine from Rally Design, delivered next day and only £213.00 over £100 cheaper than the rubber based hoses that have let me down.
The assembly procedure is slightly different from other types of hoses but is very easy to complete.
I have tested the new system with a 280 mile round trip to Silverstone and can report all is well with no fuel smell or leaks.
I can only advise that if you are using rubber or nitrile rubber lined braided fuel lines with ethanol added petrol change to Teflon lined hoses before you have a fire disaster,
cheers
John Oxborough