fuel line question

[slowboy101]

so I got briaded fuel lines -10 and I have no idea where to lead the lines thru to the engine bay

 

[92AWDHX40]

Be more specific where are they going to end up?

 

[slowboy101]

Umm....... I dont know maybe the fuel rail

 

[92AWDHX40]

Fuel rail to fuel filter, are you running it to the tank?.

 

[slowboy101]

O sorry I need to know where to put it thru the front of the car to the fuel rail I tryed to put it thru the same place the factory lines go but obviously thats to small of a place!

 

[juvi1624]

This is probably going to be one of those things that the forums aren't going to be able to answer for you since every car is different. You'll probably be best to just jump in there and do it. You may need to do some mildly heavy fabricating to make room for -10 lines, as I'm sure they won't fit through the spcae where the stock lines enter the engine bay. I'll be going through the same thing very soon, but I hope to have some room to play with since I've removed everything but the bare essentials to make my car a full drag race car.

 

[slowboy101]

^^^^ Umm... k well if anyone else has some other usefull info for me I would appreciate it

 

[force it in]

SteveTek Labs Research: High Flow Fuel Delivery System

 

[juvi1624]

^^^ He used -06 which fits through where the stock lines go, -10 is much larger and will not fit.
And OP, I'm just saying that sometimes you can't have someone holding your hand all the time and sometimes the best thing to do is just start working on it and you'll figure some thing out. I' don't know of any clear cut "best way" to run -10 lines from the stock tank to the engine bay. But since I don't have any usful info, GL with the install, and I hope you figure something out.

BTW why are you using -10 line all the way anyway? Even with alcohol based fuels I know people putting down over 500 WHP through stock lines and -6 should be a considerable upgrade from that.

 

[ramsack]

-6 is plenty, i believe more than double the flow ability over stock. stock lines support a lot of power as well. it is rare to even need -8 lines. -10 is just added weight. go too big with a single pump and you will end up losing pressure at the rail.

 

[slowboy101]

-6 is plenty, i believe more than double the flow ability over stock. stock lines support a lot of power as well. it is rare to even need -8 lines. -10 is just added weight. go too big with a single pump and you will end up losing pressure at the rail.

Well good thing I'm running duble 255's then ha

 

[juvi1624]

What I've been kicking around is running dual inline pumps, then 2 -06 lines to the engine bay and have them converge into one -10 at the fuel filter, then -10 to the rail.

 

[ramsack]

just to give you an idea of what you're messing with here...

-6 has a cross section of 44.76 mm²
-8 has a cross section of 77.57 mm²
-10 has a cross section of 118.86 mm²

a single walbro won't come close to needing more than a -6, and -8 is almost twice its size. so you have 2 pumps and you're trying to fill a tube that's almost 3x of what a single one can flow, a lot of the pump's energy to create pressure is going to be going into trying to fill an unneccessarily large tube, and you may very well lose some fuel pressure and fuel velocity when you start consuming a lot of fuel.

it's the same analogy of a tiny turbo (say a 14b) trying to fill the plumbing of a fmic with large diameter, long pipe.