Author Topic: Need help with fuel line on my 1966 mustang (Read 190 times)

blown66 · « **on:** October, 03, 2010, 01:12:14 PM »

I have a problem :lol not sure if anything can be done BUT I have a 3/8s fuel line and I have a mechanical Holley 12-289-20 fuel pump. The holley pump has a 5/8s inlet and a 1/2 out let ( -10 & -8). How do I go from a 3/8s fuel line stainless to a 5/8s braided hose to the inlet side of the pump? I see goin g from the outlet side 1/2 to the inlet side of the Y Block with two outlets that are 3/8 OR do I need to get a diffrent pump with 3/8s in and out? I will post a couple pictures..

This picture is the one that I have on the engine.The pump is a 170 gph set at 8 psi and I would need a regulator. It is brand new no fuel has been passed through it.

This is a picture of holleys 12=289-11 that is 110 gph and has 3/8s inlet and outlets.

I don't think there is a way to go from 3/8 to a 5/8s line... Thanks guys

daveSanborn · « **Reply #1 on:** October, 03, 2010, 05:00:51 PM »

While you're probably stuck using the 5/8ths inlet fitting on the pump, you should be able to buy/install a "step-up" adapter onto the 3/8ths fuel line fitting that will allow the smaller line to be mated to the larger fitting on the pump.

monkeystash · « **Reply #2 on:** October, 03, 2010, 06:27:24 PM »

Take the fittings out of the pump, and replace them with barbed fittings. Then just run a rubber fuel hose with clamps. This is assuming you don't care about using braided line and AN fittings.