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Resolved Fuel pressure high at 52 new FPR same thing

  • Thread starter Thread starter afjLX
  • Start date Start date Dec 28, 2024
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Noobz347

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#81
  • Jan 4, 2025
  • #81
afjLX said:
Well, there you go. Increases voltage output boosting flow. I’m wondering if that’s what is happening now with my CVf racing alternator.
Click to expand...

Not just the alternator but also our 36+ year old electrical system that was never really all that great to begin with.

Battery dwell has an effect on this too.
 
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afjLX

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#82
  • Jan 4, 2025
  • #82
Noobz347 said:
Not just the alternator but also our 36+ year old electrical system that was never really all that great to begin with.

Battery dwell has an effect on this too.
Click to expand...
I’m also running an optimum battery and new 4awg power and ground wires everywhere.
 
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Noobz347

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#83
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If you see fluctuations in your AFR or fuel pressure... Just regulate it.


It has an adjustable dial but seriously, I set it when I installed it and haven't touched it since.

A/C on/off, headlights, radio, etc,... it just doesn't matter. The pump voltage stays rock solid.

I have a similar component for my coil called a Boost-A-Spark. Does the same thing for coil saturation.
 
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afjLX

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#84
  • Jan 4, 2025
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Noobz347 said:
If you see fluctuations in your AFR or fuel pressure... Just regulate it.


It has an adjustable dial but seriously, I set it when I installed it and haven't touched it since.

A/C on/off, headlights, radio, etc,... it just doesn't matter. The pump voltage stays rock solid.

I have a similar component for my coil called a Boost-A-Spark. Does the same thing for coil saturation.
Click to expand...
Thanks for the recommendation. I want to add one eventually. And a power adder too. I want to make sure I have a solid foundation before doing anything extreme.
 

Noobz347

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#85
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I posted images of my FPR here: https://stangnet.com/mustang-forums/threads/kasl-customs-channel.928257/page-4#post-9424527 for somebody that discovered that his super duper FPR wasn't gonna fit.

You can see that it's [tight] in there. I had to cut about half of the vac stem off to make it fit.
 
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afjLX

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#86
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Sweet setup!!! Love that color too!!!
 
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Noobz347

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#87
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afjLX said:
Sweet setup!!! Love that color too!!!
Click to expand...

Yeah, that dude has a nice ride going. If you subscribe to his channel, tell him Stangnet sent you.


I'm still waiting for him to release the [first ride] video after the KB install. If he puts his mom in the car, it should be amazing.
 

AeroCoupe

lube between the nut and the face. I know my lubes
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#88
  • Jan 4, 2025
  • #88
Checked my records and I have the GSS307 which is the low pressure unit. The GSS340 is the high pressure. According to the paperwork I have they both put out 255 lph at 45 psi. Above 70 psi is where the GSS340 still provides flow and the GSS307 drops off significantly. Here is a site that has the flow rates of the 190, 255, and 255 HP pumps which shows the 255 and 255 HP are 1 gal/hr different at 50 psi.

Auto Performance Engineering - Walbro fuel pumps specs

High performance Walbro fuel pump sales and more by Auto Performance Engineering. Since 1997, APE has been THE place to find a Walbro fuel pump!
autoperformanceengineering.com

I would still like to see these pumps compared side by side on the same test station. You know return line size and length play into back pressure on the pump which affects the ability of the regulator to turn the pressure down.
 
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Blown88GT

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#89
  • Jan 11, 2025
  • #89
FYI. The Kirban FPR is now 3X the price they used to be. A replacement diaphragm is now the cost of what the entire FPR was. Dollar cost over the past 10 years is 33%, not 300%.; over the past 15 years, it's 45%; over the past 20 years, it's 62%.
 

Noobz347

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#90
  • Jan 11, 2025
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AeroCoupe said:
I would still like to see these pumps compared side by side on the same test station. You know return line size and length play into back pressure on the pump which affects the ability of the regulator to turn the pressure down.
Click to expand...

Fuel Flow Forensics

Jun 1, 2017
fuel flow forensic
  • Noobz347
  • bap boost-a-pump fuel flow fuel flow forensics fuel pump
  • Mustang Reference Material
 
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AeroCoupe

lube between the nut and the face. I know my lubes
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#91
  • Jan 11, 2025
  • #91
Nice! Thanks man!!
 
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