Fuel Line

[bandit]

I am replacing the electric fuel pump with original mechanical pump setup(that buzzing noise is getting too annoying). On the existing setup, the steel fuel line coming from the tank stops at about the firewall and then it is a mix of copper line and rubber hose to the regulator, then fuel filter, then carb. What I am wondering is if it would be ok to run just rubber fuel line/hose from the steel line at the firewall to the new mechanical pump, then filter, then carb. I know rubber line has to be used to connect to the pump and filter anyways, but how long can you have it before you worry about any hose collapse or pressure issues? Mechanical pump max pressure is 5.5

 

[67 coronet]

that will be fine as long as you keep it away from the exhaust.modern neopreen hose has little chance of collapsing.

 

[PUNKN8R]

Try this I use speed flex braided fuel line. In recent years various fuel manufacturers have added any number of new unpublished additives to their blends rendering some of them incompatible with synthetic rubber lined hose. Earl’s Speed-Flex™ Teflon™ lined stainless braided hose is impervious to any automotive fuel blend known to us and may be the best choice for use with modern racing fuels. All SPEED-FLEX™ hoses are compatible with petrol, hydrocarbon fuels, alcohols, nitro-methane, mineral and synthetic lubricants, and high density fuel additives. Size 6 and 8 are carbon lined to dissipate static electricity.

 

[bandit]

Thanks. That will make the swap easier. Picking up the pump and installing tomorrow.

 

[Meep-Meep]

If you take your car to the track you are likely not to pass tech with too much rubber hose. I don't recall the exact amount - maybe 8" or so - but whatever the case the factory spec works. I personally hate too much rubber hose and tend to hard plumb everything. Go to the parts store and get the hard line with the flared ends for a couple of bucks. You can flare the end of your existing cut off line and use a coupler to connect to the new piece.