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12 mm Fuel injection line

rb92673

racecar
Joined
Jan 17, 2017
Location
San Clemente
I upgraded to a Walbro HP pump in tank on my 85 740 and I want to upgrade the fuel line between the tank and the filter for high pressure. I can only find 1/2" for fuel injection and it slides onto the nipple on the tank without any friction. I am worried it will leak.

I have searched the Internets and also called Volvo, BMW, local auto parts, truck parts, repair shops and I am not finding anything 12mm or 7/16.

Any suggestions of somewhere I can order and receive ASAP?

Also, I am thinking of ditching the hard line between the tank and filter for less possible spots to leak, any problem with that?

This is a track only Lemons car.
 
1/2" comes out to 12.7 mm. Make sure it's rated for the pressure you intend to run and that it's rated for fuel. Perhaps the hard line can be replaced with 5/16" or 3/8" hard line.
 
1/2" comes out to 12.7 mm. Make sure it's rated for the pressure you intend to run and that it's rated for fuel. Perhaps the hard line can be replaced with 5/16" or 3/8" hard line.

The 1/2? hose I have is rated for 300 psi. It?s 12mm out of the gas tank
 
Been running 1/2" Earls on mine for several years, with rail pressures as high as 80psi, running a single in-tank pump and straight E85. No issues at all, no leaks, just use GOOD hose clamps, not the cheap ****.
 
Have you used this for fuel injection pressure? It says 150 PSI, but it also says SAE J30R7 which is not for fuel injection.

No, I haven't. I just saw that it was 12mm fuel hose rated for 150 psi but I suppose that could be a typo and should read 15.0 psi.
 
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