Competition -AN fuel line size for Dual Feed Pump

[RyanB]

Pretty much just like the title says... Im wondering what most use/would use for a dual feed pump setup? The way its looking I will be running the stock feed line from the lift pump into a 3-way distribution block and another fuel line comming from my AUX Haisley pump into the block. The combined fuel will then exit the block in the one port and then thru a 10AN line into my 3-way dump valve (thanks guys for hooking me up with that last week on my post) then it will enter another distribution block and dispurse to the two ports of my pump.



If anyone has any other ideas about this setup please let me know!



So I am really just needing to know what size line to go to the pump. I was thinking 8AN but maybe 6AN would be better?



Unfortunatly when I had my pump build the guy tapped the port for the 2nd feed line on the back of the pump (#6 area) so I am either going to have to run a bango fitting (thanks Jim for pointing me in the right direction for that) due to clearance or if I have room run a standard 90 degree -AN fitting.



Anyway, what do you all think? My pump is putting out 750cc's right now with room to grow in the future if I were to need it.



RyanB

 

[BigBadDodge]

Ryan, what are you runing for fuel pressure?



BBD

 

[RyanB]

not 100% sure yet. The stock lift pump for on the street right now and then for pulling I have Haisleys 12valve AUX Pump and the relief valve has been modified by Haisleys for more pressure too. One thing I like about the distribution blocks is the ports for the fuel pressure guage.

 

[Piston Slapper]

Could any of ya'll elaborate on this?



I'm trying to hook up a dual feed system to my pulling truck and don't know how to tie it in. Where is that "other" spot on the Injector pump to put the new feed?

 

[RyanB]

When I had my pump built I had them drill/tap another port for the dual feed... unfortunatly I forgot to tell him where to put it! most pump shops put it at the front of the pump where the linkages are. My pump guy tapped the back side of the pump in the area of #6. It works but is tight to get the fittings in!



Anyone have any idea on line sizes? I was thinking -8AN going to the pump for the two lines.



Ryan

 

[GOT-Torque]

I've always been curious, what are the internal sizes for -6AN, -8AN, -10AN fittings?

 

[Piston Slapper]

3/8 -6AN

1/2 -8AN

5/8 -10AN



Excert from here : http://www.aeromotiveinc.com/largedetail.php?ref=68



A dash (–) size in AN “speak” refers to the I. D. of a standard, thin wall, hard line as the basis to construct a comparable flexible hose that may be used in it’s place. A 1/2”, thin wall, hard line measures . 500” on the outside diameter (O. D. ), has an inside diameter (I. D. ) of 0. 440”, and a wall thickness of 0. 030”. An appropriate, flexible replacement line would be –8 AN, with a minimum 0. 440” I. D. Depending on line construction, rubber with stainless steel or nylon braid, or Teflon with stainless steel braid, the line’s wall thickness and O. D. may vary.



AN line sizes will have a dash (-) preceding the line size. The number after the dash refers to the number of 1/16 of an inch O. D. , thin wall, hard line to which the flexible line will compare. For example, calling for a –8 AN line would mean the engineer or system designer requires a flexible line, made of certain materials suitable for the application, that would have the minimum I. D. of an 8/16” (1/2”) O. D. hard line. The actual line construction is dictated by the application with regard to line flexibility, vacuum and pressure capability, abrasion resistance and chemical compatibility, etc. Regardless, the engineer knows a -8 line of any construction will have a minimum I. D. equal to 1/2” hard line (. 0440”), and be able to support similar flow rates.