Anyone know if you can?

 

why risk it? -6an is kind of small for the supply line!

 

6an will flow enough for 500whp. There are quite a few DSM's running 500whp+ on factory fuel lines, now that is alittle small Anyways, due a search for stevetek fuel systems on google. It should answer your questions on sizing of fuel lines you'll need.

Richie

 

Well I made over 500 with a walbro intank stock fuel lines a fram fuel filter, and stock fuel rail What size are stock fuel lines anyways?Jason

 

Wow, that's awesome! Did you retain all the stock banjo connections except for the one on the fuel filter?

I might just keep the stock lines if they work fine.

 

Depends on your fuel setup. If you use large enough injectors then you can support over 500hp on stock fuel lines.

If you are going with small injectors, however, say less than 720cc, you may consider going larger on your lines. The reason is that you are going to have a lot more pressure through the lines to get the fuel into the engine. There is a point where even though your fuel pressure is increasing you are not going to flow more fuel simply because you have exceeded the flow rating of the lines. Larger lines, however, will be able to flow more, and will also lower your fuel pressure some. If you can simply keep the pressure low and make sure that all or nearly all of the fuel is dumped through injectors into your engine, without wasting any by returning it to the tank, you will be OK on stock lines.

Some people will probably disagree with me on this. The cases where I have seen the fuel line as being a limiting factor in a system, well I don't think I've ever seen that. Normally it is because someone is trying to lay down 500hp on stock lines, 440cc injectors, pushing well over 100psi of fuel pressure. The problem there is the size of the injectors, not the size of the line.

For me, 800cc injectors + aem 1:1 + walboro 255 is all I need.

 

I have a set of 860's that I will be running. What about the stock banjo connections? No big deal?

 

If you're really going to be using those big squirters I'd go with AN fittings rather than those little banjo fittings, but I agree that -6 is plenty big for 500+ HP. My buddy runs -6 on his 69 Nova that puts down over 400 plus a 150 shot, which is all fed by a single -6 line.

 

#6 is a very large line considering your fuel pressure is set at 38-45 psi...and then when the fuel pressure reg gets a hold of the pressure and adds ... lets say 30psi.....we run #6 with 2 pumps attached then its split to the twin fuel rails....we make well over 500 w/o the nitrous engaged...then when we hit the nitrous it takes its fuel right from the same #6 line that feeds the fuel....

Howard

 

yep all the stock banjo fittings, this winter we are changing things, but to be honest I went over kill on the car, and originaly just wanted 400 hp, other people involved in the project said I was gonna make a lot more, but were worried about my fuel setup, I figured supras make 600 with similar sized lines. Jason