bursting fuel lines
#1
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bursting fuel lines
Hi,
I just installed a Walbro 190 HP and my fuel inj lines keep developing leaks. At first I thought it was because the stock lines were crap so I bought some good year 50 psi tubes and those burst too. Do I need stronger tubing? My fuel set up also includes Jim B's dual feed rail which I also recent installed.
I just installed a Walbro 190 HP and my fuel inj lines keep developing leaks. At first I thought it was because the stock lines were crap so I bought some good year 50 psi tubes and those burst too. Do I need stronger tubing? My fuel set up also includes Jim B's dual feed rail which I also recent installed.
#2
put on a pressure gauge and see at what point they are bursting... I know when I put on my walbro 190 mine were bursting around 120 psi due to the fact my AFPR was messing up and jacking up my fuel pressure. I run around 100 psi-ish now and they seem to be holding up just fine.
*edit* I just use the fuel line they have at Advanced Auto.. I forgot the part number but its extremely cheap and they cut it by the foot.
*edit* I just use the fuel line they have at Advanced Auto.. I forgot the part number but its extremely cheap and they cut it by the foot.
#6
Make sure you use fuel injection line, not simple fuel line. Fuel injection line is made for pressurized systems, where normal fuel line is for cars with carburetors, or for the unpressurized parts of a return fuel system. (You beat me to it, Ben)
I was shocked at the price of fuel injection hose.
I was shocked at the price of fuel injection hose.
#7
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Uber looking good:
http://www.westmarine.com/webapp/wcs...allpartial/0/0
$2.79/ft. I do believe that's cheaper than the fuel injection line I purchased.
http://www.westmarine.com/webapp/wcs...allpartial/0/0
$2.79/ft. I do believe that's cheaper than the fuel injection line I purchased.
#8
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yeah they are fuel injection lines, they have a double layers with a mesh inbetween plus an addition blue lining in the middle. They are rated at 50 psi. I haven't installed the turbo yet or the AFPR, car is stock other than the fuel pump and fuel rail. I guess I'll look into the "uber" lines. Do I need to replace the rubber lines at the pump as well or just in the engine compartment?
Thanks,
t.t.
Thanks,
t.t.
#10
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where does the leak occur? in the center of a section of hose, or where the hose meets a fitting?
wish i had known about the west marine hose for $3/ft. they have a store not too far from me
wish i had known about the west marine hose for $3/ft. they have a store not too far from me
#12
yeah they are fuel injection lines, they have a double layers with a mesh inbetween plus an addition blue lining in the middle. They are rated at 50 psi. I haven't installed the turbo yet or the AFPR, car is stock other than the fuel pump and fuel rail. I guess I'll look into the "uber" lines. Do I need to replace the rubber lines at the pump as well or just in the engine compartment?
Thanks,
t.t.
Thanks,
t.t.
#16
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Yeah I guess I should have been more explicit, I ask for Fuel Injection hoses and they gave me these. I didn't check the max pressure till after it burst. I ordered some from West Marine, hopefully that will fix this.
Another quest, do I need to replace the stock tubing going out of the fuel pump as well? These didn't burst on me but I wanted to see if I should replace them anyway (I bought 10' just in case).
Another quest, do I need to replace the stock tubing going out of the fuel pump as well? These didn't burst on me but I wanted to see if I should replace them anyway (I bought 10' just in case).
#17
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Well, you didn't replace that tubing with the 50psi stuff so in theory it should be fine. Plenty of Walbro equiped, boosted miatas running around that I've never heard any problems from. However, you'll be replacing a lot of the fuel line with the new Uber stuff, and that line is probably pretty old, so why not? Peace of mind at least.
#18
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Regular "fuel injection line" (SAE30R9) is required to have higher working pressure rating (125psi) and minimum burst pressure rating (900psi).
If your hose has a number of R7 and R8 it is only a medium pressure hose, but should be OK.
R6 and below and it's only "fuel hose" made for CARB cars, only 40psi working.
you can easily feel the difference in SAE30R6 & SAE30R9, it's like cooked vs. uncooked spagetti.
If your hose has a number of R7 and R8 it is only a medium pressure hose, but should be OK.
R6 and below and it's only "fuel hose" made for CARB cars, only 40psi working.
you can easily feel the difference in SAE30R6 & SAE30R9, it's like cooked vs. uncooked spagetti.
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