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Topic: Fuel pump questions??? (Read 5474 times) previous topic - next topic

Fuel pump questions???

Reply #30 –
One other thing you need to factor in is the size of the feed and return lines. I have twin Mallory Comp 140's that are Y'd into a single AN-8 (1/2") feed line to the front of he car. From there the flow is split with another Y and one leg goes to a Mallory return style regulator to the carb and the other leg goes to the fogger system via a Holley regulator with no return per NX's instructions.

I originally had an AN-6 return line but I could not get the fuel pressure at the carb below 14 psig or something like that. Called Mallory and found out that I was way undersized on the return line. I needed an AN-10 (3/4") due to the volume of the two pumps going into the single AN-8 feed line. Once the AN-10 return line was installed the problem was solved.

Long story short had I just used a simple calculator I could have done it right the first time and saved myself a lot of headache.

Darren

83 351W TKO'd T-Bird on the bottle


93 331 Mustang Coupe - 368 rwhp

Fuel pump questions???

Reply #31 –
Quote from: 83TB;424995
Quick shift you have any pics of that set up?
If there wasn't any snow/salt on the roads, I'd slip out to the shop, pull it over the pit and snap a few. The car is stored here @ home, but leave it with me and I'll see if I can jack it up and take pics....not much room....sorry.
84 COUGAR/90 HO, 1.7RRs, performer RPM,700DP, equal length shorties, stainless EXH ,T-5,Hurst pro-billet, KC clutch, 8.8/ 4.10s, line-lok, bla ,bla, bla.
71 COMET/289,351w heads, 12.5 TRWs, 750DP, Liberty TL, 9"/6.00s, 11.9x @112 , bla,bla,bla.

Never shoot your mouth off, unless your brain is loaded! ....I may get older, but I'll never grow up!....If you're not laughing, you're not living!  :laughing:

Fuel pump questions???

Reply #32 –
Found one of the reg mounting.....not very good but you get the idea.
84 COUGAR/90 HO, 1.7RRs, performer RPM,700DP, equal length shorties, stainless EXH ,T-5,Hurst pro-billet, KC clutch, 8.8/ 4.10s, line-lok, bla ,bla, bla.
71 COMET/289,351w heads, 12.5 TRWs, 750DP, Liberty TL, 9"/6.00s, 11.9x @112 , bla,bla,bla.

Never shoot your mouth off, unless your brain is loaded! ....I may get older, but I'll never grow up!....If you're not laughing, you're not living!  :laughing:
 

Fuel pump questions???

Reply #33 –
Just little update, the factory fuel will get about 2.5 psi, while the motor is crank, I have been cracking the motor and letting idol while checking out timing and other stuff, leaks, etc.... after xmas and new years, planning on doing the frame mount pump and regulator with return.  I did find a good spot for the pump, after I install it I will post some pics of it and the fuel filter install.