Fuel line size for big Horsepower??

[RestoCreations]

I am building a 527Fe stroker for my kirkham. Im assuming this engine with the keith craft ported heads and their roller camshaft that the output will be around 600 plus to the flywheel.
My question is: Will -6an(3/8") line feed this engine or should i go with
-8an(1/2")?

[blykins]

I would use at least a -8 feed line. It wouldn't hurt my feelings to run a -10 feed line.

[RestoCreations]

Thanks Brent! You have always given me quick answers and sent parts in a timely manner. I owe you great praise for being a parts distributor that follows through, answers questions about parts, and is friendly. You have no idea what i have been dealing with concerning these other companies. Im about to pull my hair out.

[blykins]

Thanks for the kind words....and you're very welcome.

[RestoCreations]

Going on 4th month now trying to get correct parts from you know who in KY. Piston rings are still an issue for some reason, but they apparently have two sets in the mail. They just dont know where they could be. Same with the balancer.

[blykins]

I can get that stuff for you if you get in a bind....

[Ron Scarboro]

From a website I used to size my system for a GT40...

You may use the following as a fuel pump "rule of thumb". Additionally, it is a good idea to give your system a bit of safety cushion.
I always run a pump just a bit larger than I need just for insurance.

For Dead-Head type regulators:

Multiply maximum horsepower by .23 to calculate minimum pump size in "free flow" GPH.
Example: 400 HP x .23 = 91 GPH "free flow"

For Return-Style regulators:

Multiply maximum horsepower by .17 to calculate minimum pump size in "free flow" GPH.
Example: 400 HP x .17 = 68 GPH "free flow"

These minimum pump sizes assume that the fuel system is equipped with fuel lines of adequate size. If the fuel lines are too small (or if there are a lot of restrictive fittings in the system) a larger pump may be required to satisfy the fuel demand of the engine. The minimum fuel line size (from the pump to the regulator) is dependent on the horsepower output of the engine (and/or Nitrous system) regardless of the size of the pump.

Use these figures as a fuel line sizing standard:

* Up to 250 HP = 5/16" or -04 AN
* Up to 375 HP = 3/8" or -06 AN
* Up to 700 HP = 1/2" or -08 AN
* Up to 1000 HP = 5/8" or -10 AN
* Up to 1500 HP = 3/4" or -12 AN

If you use a return-style regulator, you will also need a return line from the regulator back to the tank. The size of the return line is dependent on the size of the pump you are using, regardless of the engine's horsepower output. The return line must have limited or NO pressure in it. In most cases, the minimum return line size will match that of the supply line, but a larger return line is sometimes preferred.

Use these ratings to decide your return line sizing based upon fuel pump output:

* Up to 45 GPH = 5/16" or -04 AN
* Up to 90 GPH = 3/8" or -06 AN
* Up to 250 GPH = 1/2" or -08 AN
* Up to 450 GPH = 5/8" or -10 AN
* Up to 900 GPH = 3/4"or -12 AN

[RestoCreations]

Thanks! That is very helpful!

[CobraEd]

I have read that Top Fuel dragsters have a 2 1/2" fuel line.


.

[ACademic]

2 1/2"? No. But with feeding the hat, the injectors above the blower and the ones below it, the fuel pressures are insane and push several gallons of nitro methane in and out of the chambers in under 4 seconds (1000 ft runs now). Much of the fuel can't even fully ignite, so the result is really cool 12 foot flames from each set of zoomies.

[Pman1961]

Does anyone know off hand the fuel line size of the Superformance?

[Dana E.]

Originally Posted by Pman1961

Does anyone know off hand the fuel line size of the Superformance?

It's 3/8" for the fuel line.

[Jerry Clayton]

I ran -8 stainless .035 wall for my pro stockers, 1 inch on top fueler and funny car (1970s)