hey guys i am looking at FPRs and i want to know if i should run a fuel manifold and a FPR for my 750 speed demon and a seperate on for the nitrous/fuel selinoid (how the f**k do you spell that? HAHA) or can i just tee into the fuel line before my FPR and go to the soleniod?(is that it) or should it be after. also does anyone know the size of the fitting i need for the float bowl to fuel line connection and the center to center for the fuel log? i am rying to get my entire fuel system mocked up, any advise on a FPR and fuel pump. 400hp carbbed + 150 shot( thinking optimistically)
FPR on a carbbed 351 and 150 shot......?
- Thread starter 50ceptor
- Start date
bluevenom867
I will have images of molesting stuffed animals in
50ceptor said:
Hmm...the center to center should be 9 5/8".Not sure on the bowl fittings...there special for the Demons,I think its a 9/16" not sure on thread count, I think its 24.
Yes,deffinitly run two regulators,one for the carb,one for the nitrous fuel solinoid.
Use the search funtion,I posted a bunch on how to set this up in a few other thread.
Also PM 86bluecobra,unless hes sees this thread.
i am looking at FPRs and notice that only a few of them have the 9/16 inlet and outlets my demon carbs has the 9/16 fittings should i use the 9/16 thruout the entire fuel system including lines or if i use 3/8 fittings will this result in a pressure drop? i was planning on using 1/2" braided fuel line. would it be wise to stay with the larger fittings?
bluevenom867
I will have images of molesting stuffed animals in
50ceptor said:
No,no you dont need and 9/16" 24 other than for the float bowl inlets.
Pump to reg,I would use -08AN line (1/2"),regulator to carb would be -06AN (3/8").
And if you run a return line,it will be -06AN,unless its a large volume pump,then you should use a -08AN return.If your runing a dead head dont worry about a return line.But I will say that the pressure is more stabil with a return style system.
As far as regulators go,most will have 3/8" NPT inlet and out let fitting,thats fine.If it says its a bypass style,then you will want a return line.
And for fuel line,to the motor compartment,save your self some cash and time and use the blue twist lok style hose.Its lighter and easier to work with,and its NHRA approved.
bluevenom867
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i used my return line for a feed line for my nitrous sytem. I bought a fuel pickup conversion so i could remove my electric pump from the tank. i lengthed the return line in the tak so it picked up at the same spot as the regular pick-up. then i mounted 2 electric pumps. i have yet to get a fuel regulator for my nitrous electric pump but i will do so before this race season. i have a regulator on my carb a 750 holley. I used aluminium tubing for fuel lines. I used 3/8 lines and have had no problems. As for in the engine compartment i have 6an pushloc stuff. i have the blue color rubber fuel line because at the time it was the only fuel line that was NHRA aprroved. you would have to check to see if there red and black colors are allowed now. the stuff works great. and way cheaper then steel braided.
i like the ida of the blue twist loc fuel line. if i run a bypass regulator will my return line go from the FPR to the tank?
bluevenom to be honest i am not exactly sure how my fuel pump is hooked to my tank. its an 81, does it have the same setup as my 87 in tank pump. i can see that my 81 has an external holley hooked to the fuel line on the tank. im ot sure if it is bypassing an internal pump or not. but that is a question i will have to answer. is there a benifit to running a fuel log as opposed to running 2 seperate lines to your carb from the FPR? thanks guys.
bluevenom to be honest i am not exactly sure how my fuel pump is hooked to my tank. its an 81, does it have the same setup as my 87 in tank pump. i can see that my 81 has an external holley hooked to the fuel line on the tank. im ot sure if it is bypassing an internal pump or not. but that is a question i will have to answer. is there a benifit to running a fuel log as opposed to running 2 seperate lines to your carb from the FPR? thanks guys.
bluevenom867
I will have images of molesting stuffed animals in
50ceptor said:
They say that with the log,the carb with have more voulome to draw from if your experiancing alot of G's (hard take off,cornering,etc.).
But I dont really see it,as the two lines would also be more pressure sensetive and regain lost pressure faster.
And the return line goes to the tank from the regulator,but instead of going into the tank you might want to put it in the fill tube.That way you can catch any metal particles from drilling.
i found th etwist loc lines, do you hav eto use clamps for the fittings it really doesnt show you. and i think i will do the dual lines form the regulator and a return from the regulator as well. i guess i will get the aeromotive a2000 4 port bypass regulator. does anyone feel that something else would work better?
bluevenom867
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50ceptor said:
No,thats a good regulator,a little over kill but good.
You would probably be better off with their A1000 regulator.
-08AN feed,-08AN return,-06AN to the carb
streetflossin
New Member
bluevenom867 said:
sorry to bring up an old topic but why do you suguest -08an feed? I also have a 750 demon and use the a1000 and it was suggested to use -10an feed, -08an return and -06an to the carb
bluevenom867
I will have images of molesting stuffed animals in
streetflossin said:
You can use -10AN feed too,I got -08AN feeding from an A1000 pump to an A1000 regulator and its gunna be feeding a serious 427.Could I have used the -10AN feed?Yes.So why did I say -08AN?Simple I already had the -08AN feed from the previous set-up
-08AN is cheaper than -10AN and its also plenty for your motor.
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