Fuel line on 1965 New Yorker

[blakev42]

I have a 1965 Chrysler New Yorker that has a 413 engine with a 750 cfm carburetor, I’m gonna change all the fuel lines to pfte hose and I don’t know what size to use 6an line or 8an line, what should I use?

 

[65CopCar]

What pump?

 

[HOT FURY]

6AN would be the same as 3/8". Unless you have a super hi performance race gas guzzling motor you dont need the flow of 8AN or the slightly higher expense.

 

[blakev42]

What pump?

It’s the oem mechanical one

 

[blakev42]

6AN would be the same as 3/8". Unless you have a super hi performance race gas guzzling motor you dont need the flow of 8AN or the slightly higher expens

6AN would be the same as 3/8". Unless you have a super hi performance race gas guzzling motor you dont need the flow of 8AN or the slightly higher expense.

ok thank you, I’ll be buying 6an

 

[65CopCar]

Yup 6AN with stock setup.

 

[blakev42]

Ok

Yup 6AN with stock setup.

Ok perfect, thank you

 

[65CopCar]

6AN would be the same as 3/8". Unless you have a super hi performance race gas guzzling motor you dont need the flow of 8AN or the slightly higher expense.

Its even more complicated than that. With 8AN you have more fuel to be pulling against and stock pumps can struggle getting past the additional weight of the fuel in an 8AN line.

 

[HOT FURY]

Its even more complicated than that. With 8AN you have more fuel to be pulling against and stock pumps can struggle getting past the additional weight of the fuel in an 8AN line.

lol I didn't want to make anything more confusing getting into the science of hydraulics

 

[Verse]

Its even more complicated than that. With 8AN you have more fuel to be pulling against and stock pumps can struggle getting past the additional weight of the fuel in an 8AN line.

Sorry Bud, but hydraulics don't work that way. The size of the line will make no difference, unless it is so restrictive the pump can't overcome the pressure losses. A larger line is better for the pump.

 

[Blusmbl]

You’d be fine with 5/16” line, even the -6 isn’t needed.

My car originally was a 318 and it has stock 5/16 line with a Carter street/strip pump and I don’t have any fuel starvation issues with the 440.