Does my Edelbrock fuel inlet have to be for 3/8" hose or can it be 5/16"?

[WH23G3G]

I'm working on getting my 73 Charger started up for the spring time. Over the winter I added the Edelbrock heat insulator gasket and properly hooked up the ported vacuum, heated inlet air, and OSAC valve vacuum hoses. I've got the 400 with the Weiand Action Plus aluminum manifold and this Edelbrock 1400 600CFM. I'm going to give it one more try before switching back to my original Iron Intake and Thermoquad. This Edelbrock comes with a 3/8" fuel feed fitting to the carb. But my fuel lines are 5/16 can I switch out the fitting to accept a 5/16 hose so I don't have to find a combo fuel filter that has a 3/8 on one end and 5/16 on the other end. I tried adapting a fitting to the fuel pump and installing a 3/8 hose barb fitting but it's causing clearance issues and it doesn't look safe the way it was all hooked up. If I can use the original fuel pump to filter line which is 5/16 then I can still use my original fuel filter too. But can you get a fuel line fitting to screw into the Edelbrock carb with a 5/16 hose connection?

[69wannabe]

I am not sure about this but the factory avs carbs were 5/16 inlet I think and it may be the same thread's as the eddy carbs. I have several old avs carbs and a couple of junk eddy carbs and I will check and see if one fits the other.

[Dan 70]

Hello WH23G3G.
If you can't come up with a solution, you might want to try this http://www.jegs.com/i/JEGS-Performance-Products/555/15946/10002/-1. It seems to only be available at Jegs, as I don't see anything like it at Summit. I was thinking of using an Edelbrock carb, and had the same dilemma as you. If I go with an Edelbrock, this is what I will use. Also, If you don't know it yet, from everything I have gathered over the internet, Edelbrock carbs don't like to see too much fuel pressure, so from what I have read, try to keep your fuel pressure between 5.5-6.0 PSI. Again, this is what I have read. So I'm sure that someone with more experience than me will correct me if I am wrong. I hope this helps you.
                                                                                                                                                                                 Dan

[PlainfieldCharger]

I am not sure about this but the factory avs carbs were 5/16 inlet I think and it may be the same thread's as the eddy carbs. I have several old avs carbs and a couple of junk eddy carbs and I will check and see if one fits the other.

If my memory....anyway I had a problem finding a 3/8 hard line fitting with the right threads for the eddy fuel inlet. I thought I could find anything combo soltuion in the 5/16 size   I ended up rethreading a brass 3/8  fitting...no leaks

[tan top]

 you can get a  3/8" female inverted flare fitting for the edelbrock carbs  ,   , if you want to go with the smaller stock OEM 5/16" hard line  , the   female inverted flare fitting from a stock AVS fits !!   had 5/16" on mine for a while  now

have the 3/8 fitting on my thunder 800 .   with 3/8 hard line

http://www.summitracing.com/int/parts/edl-8090/overview/

[John_Kunkel]

If your 5/16" rubber hose is still nice and pliable, smear a little grease on the 3/8" carb nipple and jam the hose on....the hose will expand enough to fit the larger nipple.

[WH23G3G]

Yeah after I posted last night I noticed my stock Thermoquad fuel inlet fit right up to the Edelbrock and I was able to bolt my factory line in. Then I remembered the whole reason for doing the rubber hose from the pump to the Edelbrock. I wanted to install an inline fuel pressure gauge to watch the pressure when it gets hot in the summer. So I took my factory line back off and went with a universal Spectre glass fuel filter with the interchangeable size fittings. But they have cheap plastic fittings and when I put the 5/16 fittings on the fuel filter it stripped the threads clean off without even any pressure. Both of them stripped like nothing. It said to add teflon in the instructions and I think that's what made them strip so easy. This thing is so cheap. Does anyone make a good fuel filter with fitting like that or a fuel filter that has 3/8 on the carb side and 5/16 on the pump side?

[WH23G3G]

Ok I found the fuel filter from Spectre that accepts 3/8 or 5/16 hose on each end. Looks much like an OEM Mopar fuel filter for my 73 400-4bbl. Question is now how safe is this setup? I'll post a picture after I've got it all installed but as I'm doing it I'm always wondering how safe all this is. I'm running a 3/8" silicone fuel hose from the Edelbrock then I've got a Spectre inline fuel pressure gauge so I can watch the fuel pressure. Then the fuel hose goes from the fuel pressure gauge right along side under the distributor back behind the alternator down to the fuel filter. Much like the original steel fuel line. I was concerned as to how safe the OEM setup was with a steel fuel line running right behind the alternator and then in close proximity to the distributor, coil, and even RH exhaust manifold. It just seems oh so much more unsafe using all hose eventhough it's silicone fuel hose. I mean if a clamp isn't just tight enough or the fuel pressure gauge start to leak or the fuel hose resting on the alternator going down to the fuel filter ruptures, that's it! The only thing I can think of is to run a wire sheath over the hose to protect it from rubbing. But don't know if it will hold up to how how that block gets. What do you'll think?