CK5
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Question about fuel lines and high pressure pump

That is the most important part. Did you measure the pressure at the rail when you did that?

I’ve tested tbi units before with 15 at the pump and 14 at the reg. I used rubber line on that without issue

@6872xtc is using factory TBI lines on his Edelbrock system


No I just dropped the tank for the new pump install when I started thinking about this section of line.

Why would they want any of it changed then? Mine looked good but I took it off because the instructions said so.
 
No I just dropped the tank for the new pump install when I started thinking about this section of line.

Why would they want any of it changed then? Mine looked good but I took it off because the instructions said so.
Just as you mentioned, it is 30 years old. And the manufacturer wants you to be able to put it together and go, not find that leak or issue on start up

maybe put it together with what you have, and invest the time and money to make it “perfect” later
 
Don't forget about the section of flex line at the fuel filter, and it has the same crimped connection as the ones at the tank.
 
Don't forget about the section of flex line at the fuel filter, and it has the same crimped connection as the ones at the tank.


I replaced everything from the filter to the rail then from the regulator back to the steel line already.

I am going to replace those others so that I can sleep at night
 
When I plumbed mine, I ran aluminum tubing down the frame rails...-8 supply, -6 return. I have a short run of aeroquip braided stainless on each end... from tank to lines and lines to throttle body
 
Mine appears to have a crimped braided to hard line connection coming off the tank, not threaded like I hoped to see. This is disappointing. Now what?
 
I took the line to the hydraulic shop and they cut off the old stainless braided at the crimp, installed the remaining piece of the Aeroquip hose and crimped a new brass sleeve over each end, using my existing fittings. They also replaced all the o rings and charged me $25.

The braided line was plastic looking inside and not rubber at all. We decided that the return line would be fine and will reuse it.
 
That’s likely a Teflon line. Considered higher quality. Less susceptible to breakdown from fuels and other corrosive fluids. And capable of higher pressures than rubber if memory serves.
 
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