This is topic Stock Fuel Lines Are Good Until What HP? in forum Tech Talk at Northern California Ford Owners  .


To visit this topic, use this URL:
https://californiafords.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=6;t=018832

---

Posted by racsirx (Member # 1710) on :
 
I am just curious how much HP before you need to upgrade to bigger fuel lines, even if you have a SN95 Fuel Rails, and a Walbro 255 intank and a Walbro 255 external pump on a FOX? If I am correct the stock fuel lines are like 5/16".
 

---

Posted by TURBOGT (Member # 234) on :
 
i made 500 flywheel hp with 255 pump, stock fuel lines, stock fuel rail and an adj. fuel pressure regulator. I ran water/meth but I'm sure if I jacked up the fuel pressure another 10psi the stock lines would cover 500hp no problem. I've heard of guys over on tm.com making almost 600hp with stock lines.
 

---

Posted by racsirx (Member # 1710) on :
 
I already made 508RWHP with an automatic, I didnt see a problem, but the stock lines do seem real small for that kind of HP.
 

---

Posted by 95331StrimVert (Member # 6250) on :
 
Hello Lee,

I agree, the stock rails are small. I think at 500 RWHP you are pushing them to the limit. I was concerned as well so I upgraded to the BBK rails and regulator. Piece of mind ;-)

Tony
 

---

Posted by 95331StrimVert (Member # 6250) on :
 
BBK Rails installed...


 

---

Posted by SmokinLX (Member # 1684) on :
 

quote:

---

Originally posted by 95331StrimVert:
BBK Rails installed...

---

How was the install/fittament? Have talked to a few people with them and they said they would'nt purchase them again ? Any info will be appreciated!
 

---

Posted by racsirx (Member # 1710) on :
 
Tony, I already upgraded to SN95 Fuel Rails ,which are bigger, and an Aeromotive Fuel Regulator.
 

---

Posted by 95331StrimVert (Member # 6250) on :
 
The rails fit very well, and there is excellent clearance for the distributor. The main hassle was getting the cross over tube pressed on to the hose ends, which was a bitch. However the setup is very nice with the fact that it retains the stock regulator position. The regulator mounts on the rail. I don’t think there are any other rails that do this.
 

---

Posted by JohnB (Member # 969) on :
 
In general, 500-550 is a ballpark answer. It is going to depend more on your injectors and how close they are to 100% duty cycle before the supply lines become a issue. Flow will never overcome pressure, due to the line size (restriction) and it being a return system. And yes, stock is 5/16".
 

---