I got the Barricade fuel injection line from Napa paid 6 dollars a foot its like it just disolved on the inside
The left coast, CO, & IL seem to have the ****tiest "fuel" on the planet today! NONE of the rubber core hoses will stand up to it, not Barricade, not Fuel Inj hose, not braided stainless, this gas is too aggressive for any type of rubber. Read this boys & girls: http://www.hotrod.com/techarticles/engine/hrdp_1101_performance_fuel_hoses/viewall.html I like the safety of stainless hard lines under & around the p***enger compartment. They don't rust & perform best in a crash situation. To avoid the issue gas degrading hoses, you need to run PTFE (Teflon) lined hoses for the "jumper" hoses to the carb or tank. The black (grounded) inner liners are the safest & the best (white is for brake lines). We've been running TechAFX AN hoses on our cars. It ain't cheap, but it won't degrade & they guarantee their product. And stay away from that Chinese **** that's out there. Only buy the stuff that's Made in USA http://www.youtube.com/watch?v=QkuopDCny4s
OK, I did some research and the STANDARD for fuel lines with a laminated lining capable of handling 180 psi and apparently immune to any standard fuel additives is known by a code name. SAE30R9 aka SAE 30R9. Gates has a write up here http://www.gates.com/common/downloads/files/Gates/brochure/TechTipsForm.pdf which discusses the properties of this fuel line and compares it to 30R7 which is for low pressure applications but is specifically said to no longer be applicable for OEM use because of permeation. So, how do you know if you have the right line? It will have "30R9" printed on the outside of the hose. If you don't have that printed on it, don't buy it. Please google SAE 30R9 and look at images to your hearts content. An excerpt from the write-up. [FONT=Arial+T42+ZCOMTN][FONT=Arial+T42+ZCOMTN]Standard fuel and oil (SAE 30R7) hose is rated for low-pressure applications at 50 psi working pressure up to 3/8" size, and 35 psi for sizes over 3/8". This general-purpose hose contains a light reinforcement, and the rubber materials can be any compound that is suitable for fuel, oil and vapors. However, Gates Corporation engineers warn installers that fuel formulations at many US refineries are constantly changing as proprietary blends are introduced according to government mandates and seasonal influences. At times, more aggressive fuels can extract the oils that give SAE 30R7 hose its flexibility. The result is a brittle, stiff tube that will greatly reduce the performance and service life of the hose.Fuel injection (SAE 30R9) hose or MPI (multi-port injection) hose is reinforced to handle higher pressures up to 180 psi. It can be used on all injection systems that use hose clamps. It is not designed to replace coupled ***emblies on fuelinjection systems. [/FONT][/FONT]
Cunifer - Cu ni fe - copper nickle iron alloy That stuff is the bomb and almost as easy to run as rubber.
I think the point is that hard lines can be run along the frame and all over the engine because they are not moving with regard to what they are bolted to. At some point, the fuel line leaves the frame and moves over open space to the engine. Since the engine is rarely rigidly mounted to the frame and is usually mounted using rubber bushed mounts of some kind, there is some flex that must be compensated for. Since hard lines are not receptive to vibration, flexible fuel lines bridge the gaps where excessive vibration would fatigue a hard line. This is why we must use small sections (at least) of flexible rubber lines in the fuel delivery system. I'm just offering a suggestion for a fuel line that stands up to modern fuels.
I'm wondering if this problem is specific to certain parts of the country with special formulations. I have some short pieces of flex line ( non-EFI rated) that have been in service for a few years with no problems. I believe its Gates hose that I got either at NAPA or Advanced Auto. I believe that here in Maine we only have 10% ethanol gas.
there needs to be some "rubber" in the fuel line in places with large relative motions, like frame to engine, just like in brake systems from frame to wheels. The 2011 Hot Rod article Safari Wagon linked to says J30R9 is the SAE rating to look for on rubber hose.
I've tried many different, the best seems to be goodyear hose but even that gets overly hard after just a year or so. I keep rubber hose to bare minimum, flexable connections only, and use less than a couple feet total.
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