7 replies to this topic

[Adax]

I can find nothing in the GCR regarding using anything other than OEM fuel lines (hose). With the new adjustable FPR regulations, something other than stock hose will have to be used. I'll assume I should use something of similar ID (5/16)? What about using -6 AN lines (most adjustable FPR's are designed for this)?

Any thoughts or did I miss something.

Alan

[davew]

I can only speak for my kits, but I include all the neccessary hoses and clamps as part of the kit.

Make sure that what ever you decide on, that it is rated as fuel injection hose. Autoparts store rubber fuel line is rated for carburetors running 7-10 psi. You must specify high pressure fuel injection hose. At about $6 per foot. And get the correct clamps!

Dave

[Adax]

Already got one of yours installed, Dave. That's what got me thinking about it.

[dstevens]

Auto parts stores in these parts carry fuel line capable of injection as a standard. There haven't been carbs on passenger cars in almost 30 years. We did the stock cars in all braided and AN fittings but it can be a bit expensive and making your own can be tedious at first. I think it's worth it but I'm using stock fittings and generic fuel hose in the Miata because I don't see where replacing that is legal in the rules.

[Lee Tilton]

Auto parts stores in these parts carry fuel line capable of injection as a standard. There haven't been carbs on passenger cars in almost 30 years. We did the stock cars in all braided and AN fittings but it can be a bit expensive and making your own can be tedious at first. I think it's worth it but I'm using stock fittings and generic fuel hose in the Miata because I don't see where replacing that is legal in the rules.

And just because the line is braided doesn't mean it is suitable for fuel. I used braided in my FFR Cobra build, and the fuel fumes would leach out over time. You need to use a specially coated line to prevent fuel odors.

[dstevens]

And just because the line is braided doesn't mean it is suitable for fuel. I used braided in my FFR Cobra build, and the fuel fumes would leach out over time. You need to use a specially coated line to prevent fuel odors.

Indeed. The braided we use is Aeroquip AQP for fuel or PS and is good for about 1000 psi or so, burst at 5k psi. And it's about four bucks a foot. Aeroquip also has FC300 which IIRC is around 2200-2300 psi. If you are working on any plumbing in your car you need to make sure you use the right parts.

[Clayton L]

Autozone carries this Nitrile lined fuel injection hose that works great and doesn't break down due to the liner. It's not cheap though.



BTW, carburetors were used up until about 1990 (~20 years ago). A lot of the fuel line you see isn't rated for fuel injection, but the stuff that is, says it pretty clearly on the side of the hose. I don't buy it unless it is lined with something other than rubber though, even for carb setups.

[dstevens]

Most passenger cars stopped using carbs around 1984 which is around the time many started going to front wheel drive. Light trucks and a few passenger cars used them until around 1990.