Customs Gas line... How close is too close ?

I know that there is no rule of thumb but I had to redo my exhaust from a round glass pac design to a oval design muffler now my fuel line is about 3/4" from the muffler at one point. It is a steel fuel line, not rubber. Should I be concerned. Anybody else close to this?

 

I wouldn't be at all comfortable about this. At the very LEAST I would put a silicone insulating sleeve on that section of hardline if for no other reason than to keep the fuel cooler. Then there's the whole explosion potential.

 

If you have to ask, it's too close!

 

i would move it

maybe i'm being paranoid....there is a spot farther back on my `36 where the steel fuel line is about 3 inches from the exhaust , i have a heat shield on it

 

yes, add shield of some type of heat resistant material

 

as well as shields etc add something sacrifical, like zip tie, as a tell tale - hopefully you'll have learned something is getting too hot before it's too late!

 

What fuel system do you have? With a carburetor, the flow normally stops and starts as the needle valve opens and closes so the fuel sits in the line and heats up. With a bypass system like fuel injection or a bypass type regulator, there is constant flow so the fuel won't get very hot in a short distance.

 

Imagine getting off the freeway after a hard run in August, you pull into an air conditioned restaurant for a bite to eat.
While you are chilling in comfort that fuel line out there is literally boiling away.

 

Oh my God are you Trying to Blow up Your Car Thats the way to do it
shit I had a problem like That between my Electric Fuel pump & Tail Pipe
and I did not like because it was about 3" from pipe & Moved to about 6".

Just my 3.5 cents

Live Learn & Die a Fool

 

Exactly as Squirrel said , you obviously have concerns. So the fuel line needs to be shifted. No amount of shielding will work in 3/4".

 

You all haven't looked at how close the fuel lines run compared to the exhaust under many newer cars have you? Gene

 

Moving it might be a P.I.T.A but so is insurance paperwork and hospital beds.

 

Just sleeve it! Heat sleeve protects higher heat than will ever come close to the line. I’ve been sleeving my fuel lines for years, and I haven’t blown up yet! Everything in the engine bay of my latest build is heat protected, wether it’s needed or not.

 

Putting aside the explosion worries, there are still potential vapor lock and combustion efficiency issues with warm/hot gasoline. Shield or move.