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Kirkham Motorsports

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  • 1 Post By strictlypersonl
  • 1 Post By bcrumpley

 
 
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Old 02-10-2021, 03:48 PM
eschaider's Avatar
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Cobra Make, Engine: SPF 2291, Whipple Blown & Injected 4V ModMotor
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Quote:
Originally Posted by Grubby View Post
I prefer a mechanical pump.

Have you built 600 hp cars that used a good quality mechanical pump without issues?

My engine builder is on the fence and wants to go the route that will guarantee no engine issues.

John

You are pretty much at the upper end of the flow capacity range (possibly over it) for mechanical fuel pumps, John. One gallon is essentially 3.8L so 140 gph is 532L. The time dimension on all of this is hours so you are looking at 532 LPH with no reserve capacity. Give yourself 15% head room and you are at 610/612 LPH. This number is unattainable with traditional automotive mechanical pumps, you need electric.

My suggestion would be two TI Automotive F90000267 Fuel Pumps. Each one is 420 LPH. This is a link to the pump => F90000267

Th easiest way to mount the pumps is with a pump basket that goes through the top of your fuel tank. If you have a fabricated tank you will need to weld a flange to the top of the tank. If you are repurposing an gem tank you can buy a pump hat that is designed for your tank (very likely). Here is a link to a dual pump hat for an 03/04 Cobra tank using two TI automotive pumps, click here => Fuel Pump Hat

Fore Innovations has been making fuel system components for supercharged Ford OEM vehicles since the 03/03 Cobra's. I use one of their triple pump hats for my engine with three 255 lph FGT pumps only because ten years ago these bigger pumps available today were not available then.

Almost forgot you will need to run a fuel pressure regulator to bring the fuel pressure down to 6 or 7 psi for the carbs(s). The fuel pump hat has a return port for the fuel the pressure regulator bleeds off through the return line to hit your target 6 or 7 psi number.

The register on the top of the fuel tank is just a simple ring with a bolt circle to match the pump hat and a recess for the OEM fuel tank gasket. BTW these fuel pump hats use OEM Ford fuel level sensors. In the FWIW bucket Fore also has all the plumbing hardware to simplify the job. His prices are very competitive in the US. I am not sure about down under pricing so you might be able to get some of the hardware less expensively by sourcing locally. It is worth checking around.


Ed
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Last edited by eschaider; 02-10-2021 at 05:33 PM.. Reason: Spelling & Grammar
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