Calculating fuel line size
03-18-2013, 09:20 AM
#1
On The Tree
Thread Starter
Calculating fuel line size I will be installing new fuel lines on my body-off project corvette 1981
I need to figure out the size of the fuel lines (feed & return) to install.
I have checked the FAQ and found I need 51 to 65 lb/h injector.
But what about fuel line size? And should return line be smaller than feed line?
I need to figure out the size of the fuel lines (feed & return) to install.
- LQ4 turboed to 600-700 hp.
- Walbro 255 l/h at 60 psi max (http://www.summitracing.com/parts/vpn-gsl392)
I have checked the FAQ and found I need 51 to 65 lb/h injector.
But what about fuel line size? And should return line be smaller than feed line?
03-18-2013, 06:57 PM
#3
For that you only need a 3/8" or -6 supply.
I typically run a -8 supply & -6 return for most applications under approx 1100rwhp as the cost between a -6 & -8 are very little.
A 5/16" return can sometimes cause elevated idle pressures due to line restriction, so I never go below 3/8" or -6 on the return.
I typically run a -8 supply & -6 return for most applications under approx 1100rwhp as the cost between a -6 & -8 are very little.
A 5/16" return can sometimes cause elevated idle pressures due to line restriction, so I never go below 3/8" or -6 on the return.
