Original 426 Hemi questions

What about fuel?
Ive found non-ethanol fuel on the pump but its 90 octane, i know they were designed to run pump with the 10.25:1 but thinking 90 maybe too low.
Also they need leaded and thats MUCH harder to come by.
Reading around on the web has been less than conclusive if the additives actually do anything at all.
Pretty sure these cars NEED leaded for the valve seats. Not so much for the octane as they were designed to run on the pump gar of around 93. Fuel pointers would be great
https://www.redlineoil.com/lead-substitute
 
From your description the carbs are over filling because the needle valves are not sealing against the seats. This typically isn't something you need a new carb to fix. Sometimes the old carbs had brass floats that would corrode and get pin holes so they wouldn't float, but many times, you can tap on the side or top of the carb by the outlet with a small hammer or a wrench and get the needle and seat to unstick and start working.
 
From your description the carbs are over filling because the needle valves are not sealing against the seats. This typically isn't something you need a new carb to fix. Sometimes the old carbs had brass floats that would corrode and get pin holes so they wouldn't float, but many times, you can tap on the side or top of the carb by the outlet with a small hammer or a wrench and get the needle and seat to unstick and start working.
Another thing he can try is to pinch off the rubber fuel line and let the thing run till it dies. This will make the floats drop. Then take the plyers off the fuel line and crank it till it starts.

The incoming fuel may push whatever is keeping the seat from sealing out.

I suspect that a rubber line is coming apart internally myself. Or someone forgot to put a fuel filter in line.
 
From your description the carbs are over filling because the needle valves are not sealing against the seats. This typically isn't something you need a new carb to fix. Sometimes the old carbs had brass floats that would corrode and get pin holes so they wouldn't float, but many times, you can tap on the side or top of the carb by the outlet with a small hammer or a wrench and get the needle and seat to unstick and start working.
These carbs were completely rebuilt not long ago but im afraid they have sat probably 2-3 years with fuel in them. Dont think my dad used non-E fuel either. Think this may work?
Another thing he can try is to pinch off the rubber fuel line and let the thing run till it dies. This will make the floats drop. Then take the plyers off the fuel line and crank it till it starts.

The incoming fuel may push whatever is keeping the seat from sealing out.

I suspect that a rubber line is coming apart internally myself. Or someone forgot to put a fuel filter in line.
I could try that if the car started lol. It almost did yesterday but we decided to stop after finding both carbs leaking.
 
These carbs were completely rebuilt not long ago but im afraid they have sat probably 2-3 years with fuel in them. Dont think my dad used non-E fuel either. Think this may work?

I could try that if the car started lol. It almost did yesterday but we decided to stop after finding both carbs leaking.
Do you have an electric fuel pump? Most Carter style carbs can only take around 5 pounds max of fuel pressure.
 
Do you have an electric fuel pump? Most Carter style carbs can only take around 5 pounds max of fuel pressure.
Yes, good point. We had Carter carbs on a few of our antique boats, that were also retrofitted with electric pumps and we had in-line regulators to restrict the fuel pressure to 5psi.
 
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I'll post pics when I get better ones.

I'm thinking a good Italian tune up would work with some non ethanol pump which is 90 here. Add a few gallons of some kind of leaded fuel,if I can find it ..anyone have suggestions for that?
All I can think of is VP from a race shop.
No Italian tune up on American hot rod . Go easy at first. You are sitting on some serious car value.

My automotive work partner buys his non ethanol fuel at the local small airport.


Do NOT replace those carbs with edelbrock garbage. Get a guy to help you! It likely needs a needle and seat and top gasket kit. I would do it on the car.

and ... don't start a fire!
 
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