Stock Fuel feed lines limits??
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Staging Lane
Joined: Nov 2013
Posts: 67
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Stock Fuel feed lines limits?? At what rwhp limit should I upgrade my stock fuel feed & return lines??
I am after the 750rwhp mark but I dont know if my Walbro 400 will make it or the stock fuel lines..
Any advice please!!
I plan on running my stock fuel lines to a Fuel pressure regulator, with a return line, then fuel rails..
I am after the 750rwhp mark but I dont know if my Walbro 400 will make it or the stock fuel lines..
Any advice please!!
I plan on running my stock fuel lines to a Fuel pressure regulator, with a return line, then fuel rails..
TECH Regular
Joined: Oct 2014
Posts: 415
Likes: 2
I think you meant "fuel lines".
I'm not claiming to know it all, but I definitely did not hear of anyone pushing 750+RWHP on the stock lines. I was at just over 600 to the tire with the stock lines and it seemed about the limit to me. Others from my research at the time who had their sights north of 700 RWHP all seemed to upgrade the lines as well.
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Restricted User
Joined: Mar 2014
Posts: 7,192
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From: Ohio
I can think of at least one BMW that made 1500 HP on -6 AN Feed/Return lines on race gas.
-10 AN line is good to 2500+ HP. Lots of Pro-Mod guys run -10 AN lines making huge horsepower. Aeromotive's 3000 HP fuel system uses a -20 AN line from the fuel cell to the pump, and then -10 AN from pump to rails.
Most people go overboard on their fuel system. There are a few N/A guys local to me using -10 Feed line on their 600 HP N/A big blocks because they swear -8 AN isn't big enough. With enough fuel pressure, you can push massive amounts of fuel through those smaller lines.
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I run 6an on my truck for feed and return and make 650rwhp on corn, and have turned it up futher on the street.
The drag car uses two 8an lines on alky to make 2500hp.
3/8" stock line will go to 800rwhp all day with a good pump(s).
The drag car uses two 8an lines on alky to make 2500hp.
3/8" stock line will go to 800rwhp all day with a good pump(s).
I'm curious what the real limit of stock 3/8" fuel rails on E85 actually are. I'm near or above your power level on stock 3/8" lines but it's tapped out with 2 walbro 450s pushing. I just can't figure out if it's the stock regulator on the rail or the actual line size.
That's with or without meth supplementing fuel?
I'm curious what the real limit of stock 3/8" fuel rails on E85 actually are. I'm near or above your power level on stock 3/8" lines but it's tapped out with 2 walbro 450s pushing. I just can't figure out if it's the stock regulator on the rail or the actual line size.
I'm curious what the real limit of stock 3/8" fuel rails on E85 actually are. I'm near or above your power level on stock 3/8" lines but it's tapped out with 2 walbro 450s pushing. I just can't figure out if it's the stock regulator on the rail or the actual line size.
I'm at 616 RWHP on stock fuel lines, fuel rail, fuel pressure regulator. 60# injectors, Lonnie's dual in tank 255's pumps. Plan on pushing this to the 700 mark in the spring.
Also to add my meth/water injection doesn't supplement any of my fueling.
Also to add my meth/water injection doesn't supplement any of my fueling.
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I have a set of ID2000's that I got for a good deal for my setup. I have twin intank aeromotive 340's(one only comes on under boost), with stock lines, feeding a 5.3 w/ a Huron Speed single PT7675 a2a kit. I'm going to run the LJMS Stage II cam w/hand ported 799's. I'm looking to hit the 800whp mark. Due to funds I'm going to have to stick with the stock lines and regulator. Plans are to run E85.
If skinnies is correct, I shouldn't have a problem hitting my mark, right?
If skinnies is correct, I shouldn't have a problem hitting my mark, right?
Interesting thing I found about return lines, the Aeromotive 13109 regulator I'm using has an internal passage of only ~0.18" or so on the return orifice, so equivelant or smaller to various brands of 4AN line. Always interesting to find the restricting point in a system.
Launching!
Joined: Oct 2003
Posts: 267
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From: Chicago
Kenny bell is running 1000 hp with stock type pumps and lines, with the boost of pump, which works off a hobbs switch.
I do have 10 an line, and 8 an line from an old race car.. But don't know if that is necessary...
Are you running a return?
I am not sure what I should do...
My 900whp hp with stock feed and evap line as return was using twin walbro 255s, aeromotive 1:1 regulator. I ran it like that for 4 years, I have since added meth so its even easier on the fuel system.