Resolved Fuel pressure high at 52 new FPR same thing

Well, there you go. Increases voltage output boosting flow. I’m wondering if that’s what is happening now with my CVf racing alternator.

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

Battery dwell has an effect on this too.
 
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If you see fluctuations in your AFR or fuel pressure... Just regulate it. :D


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.
 
If you see fluctuations in your AFR or fuel pressure... Just regulate it. :D


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.
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.
 
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.


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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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%.
 
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