Fuel pump reccomendation

[jimzzilla]

Hello, I have a 1988 Mustang here are the specs:

327 Stroker Motor.
Forced Induction - Procharger D1Sc / 12 PSI pulley.
Quick Fuel 650 blow thru carb.
Aeromotive A 100 Fuel Pressure Regulator.
Motor Dyno's at 586HP.
Base fuel pressure at regulator 6 PSI
Street Driven.

One of my fuel pumps failed so after 6 years I an going to replace them both.
I cannot find any part numbers so I want to get the correct ones.
the 2 fuel pumps are inline and are located on the outside of the fuel tank.

The fuel line comes out of the gas tank (AN-8) into a pre filter and then into a Y conector to feed the 2 pumps
then another Y connector coming out of the pumps bring it into one fuel line, to a after filter and then to the
blow thru carb.

I want to get Walbro pumps the GSL393 pump looks like the one I need for my application, or so I think
that is why I am here asking. Thank you in advance for your advice, James.

Below are the specifications of the pumps,

 

[Noobz347]

What is normal fuel pressure for your rig, at idle?

 

[Noobz347]

Base fuel pressure at regulator 6 PSI

Never mind, I missed it the first time.


None of those pumps are what you need. Pretty sure you need a pump for a Carb.

 

[jimzzilla]

What is normal fuel pressure for your rig, at idle?

6 PSI

 

[Noobz347]

I just saw @AeroCoupe running through the hallway.

He will know.

 

[AeroCoupe]

Went into the other room but I'm here...so my first question is can you post up a picture of the existing pumps? In my head this just doesn't make any sense as typically you do not use pumps that put up EFI pressures to run a carb setup. Would also like to see a pictures of the regulator as the A 100 part number is not pulling up. Also, is the tank sumped or are you feeding it from a pickup assembly where the old fuel pump hanger mounted?

 

[jimzzilla]

Yes I was mistaken about the fuel pressure regulator it is a Aeromotive A 1000

Product Info​

P/N 13204: A1000 Carbureted return style Regulator

The A1000 return style Regulator was designed for use with our A1000 Fuel Pump or similar style EFI pumps in a carbureted application. This regulator is perfect for naturally aspirated or 'blow-through' supercharged engines.

• Base fuel pressure adjustable from 3-15 PSI.
• (1) ORB-10 inlet port and (1) ORB-08 return port.
• P/N 13204 provides (2) ORB-06 outlet ports and 1/8' NPT gauge port.
• Fuel pressure rises on a 1:1 ratio when referencing boost.
• return style design provides the ultimate, dynamic fuel delivery system.
• This product is not legal for sale or use on emission-controlled vehicles except when used as a direct replacement part matching OEM specifications.
• EFI conversions will require a larger-than-stock return line for proper low pressure control.

Please see below my fuel pump set up.

 

[AeroCoupe]

Okay, now I understand what you have going on. Two more questions, what is your maximum boost pressure and is the 586 hp on a motor dyno or chassis dyno? I read you have a 12 psi pulley on the blower but wanted to see if it was actually making that much or more.

 

[jimzzilla]

I do not know what the maximum boost pressure is but the HP numbers were on a chassis Dyno.
Personally I think the 12 psi pulley is a little much but I do not have any extra room for a 10 psi pulley
due to hood clearance.

 

[AeroCoupe]

Okay, so you are well past 600 crank hp which means you need to step up to the GSL391's which can support 400 hp each in a boosted application so a total of 800hp. The GSL393's are 330 hp each so a total of 660 hp which gives you about zero room being the motor is probably making that or more on an engine dyno. Just my .02.

 

[85GTStangGuy]

Okay, so you are well past 600 crank hp which means you need to step up to the GSL391's which can support 400 hp each in a boosted application so a total of 800hp. The GSL391's are 330 hp each so a total of 660 hp which gives you about zero room being the motor is probably making that or more on an engine dyno. Just my .02.

I think you mean the GSL393's...

 

[AeroCoupe]

Yes sir and corrected.

 

[jimzzilla]

I do not know if there is a rule of thumb but 586 HP on a chassis dyno is approximately how much HP at the fly?

 

[85GTStangGuy]

Auto or stick?

I'd guess you're at least 690 fwhp.... maybe as much as 730.

 

[jimzzilla]

Auto, so I guess about 20% drive train loss?

 

[85GTStangGuy]

Auto, so I guess about 20% drive train loss?

Yea, in that area. Depending on the tranny, and how it's built, the numbers I've seen bandied about are 18-20%.