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Fuel pump size? 351 carbed.

5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Fuel pump size? 351 carbed.

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Old 12-13-2005, 07:33 AM
  #1  
92BOOSTED
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Default Fuel pump size? 351 carbed.

Well i am going carbed. I bought a ford motorsport 385hp 351W crate engine for a great price.
Now i am trying to figure out how much fuel pump i'm going to need.
I bought the Trick Flow stage two camshaft as well as an Edlebrock RPM air gap intake,
750 proform carb and Tick Flow track heat heads.
I will be squirting a 125-150 shot thru this as well, which brings another question, should i use a seperate fuel pump for the nitrous?
Any ways, i have been into fuel injection for so long, i'm not used to this carb stuff anymore.
With luck these parts will give me at least 350rwhp." without nitrous"

Rye
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Old 12-13-2005, 08:19 AM
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RacerX
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Default RE: Fuel pump size? 351 carbed.

use the holley blue pump for the motor, and the red for N2o. up-grade to 3/8 fuel supply lines. buy the pick- up tube assembly to replace the small stock pick up tubes. Or can install mechanical pump(hi-volume) for motor and Red pump for N2o. Can mod. the factory timing cover,very easy just drill out and file block off flashing on aluminum cover. or just buy on for $70.00. Remember to get a press. regulator and gauage. Good luck!![sm=nxsmile.gif]
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Old 12-13-2005, 11:53 AM
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393Bird
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Default RE: Fuel pump size? 351 carbed.

Here is how I did mine.



Details:
http://members.tccoa.com/392bird/birdwork5.htm

I am using the Holley Black pump and a return regulator.

Here is some great fuel system information:
http://www.centuryperformance.com/fuel.asp

I would rather over build the fuel system, and never have to redo it, than have to keep upgrading it as my power level goes up.

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Old 12-13-2005, 10:45 PM
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tinman
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Default RE: Fuel pump size? 351 carbed.

I would use 1/2" for the entire system for the gas and 3/8" for the 'other' side.
Using regulators there should be no problems. I'd set the carb gas @ 5-6.
I don't know if I'd use the Holley pumps, I like the Aeromotive types.........
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Old 12-13-2005, 10:48 PM
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vfast
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Default RE: Fuel pump size? 351 carbed.

being a mild engine fuel set at around 6-7 should be good
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Old 12-13-2005, 11:52 PM
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tinman
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Default RE: Fuel pump size? 351 carbed.

BTW, use a quality filter on both sides between the fuel supply and the pump.......
Use relays for both pumps........
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Old 12-14-2005, 07:30 AM
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92BOOSTED
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Default RE: Fuel pump size? 351 carbed.

Hey tinman. Why the use of relays on the pumps instead of just key on?
By the way, i'm going to be using my stock tank and i'm going to be welding in a sump.
This helps guys, but how do you calculate how much fuel you really need so you can buy the correct pump?
I will be seperating fuel pumps for the engine and nitrous, to be on the safe side.

Thanks
Rye
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Old 12-14-2005, 09:49 AM
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RacerX
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Default RE: Fuel pump size? 351 carbed.

be VERY careful weld the tank. especially if it had fuel in it before!!! Better to get a New tank. Most place won't even weld them because of possible explosion. Even in a submerged enviroment,very dangerous. Good luck!![sm=nxsmile.gif]
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Old 12-14-2005, 11:31 PM
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tinman
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Default RE: Fuel pump size? 351 carbed.

Reason for the relays is so that when pumps start, they running on the full 12.5-13.5 volts.
Makes them have a better reliability.
If I can remember right it takes 5# of fuel per HP per hour.
DO NOT TAKE THAT AS GOSPHEL.....
A gallon of VP race gas is 6.53# or something like that.......
So you can see if you have a carbed car a pump of say 140 gallons/hour will work good.
Don't worry so much about pressure as volumne.....
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Old 12-15-2005, 07:42 AM
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92BOOSTED
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Default RE: Fuel pump size? 351 carbed.

The gas tank i'm not worried about. I am going to purge this tank before i weld it. I have done it many times before with making my own rear sump kit.
I am thinking about getting the summit kit SUM-PUMPKIT7A which includes a 110gph pump.

Rye
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