Manufacturers

Adjustable Regulators

Fuel pressure adjustments allow a tuner to change the amount of fuel delivered per unit time from the injector. Any changes affect the fuel curve globally, so re-mapping the ECU's software is critical whenever pressure is turned up or down. Please consult with one of our staff with any questions. It is critical that your combination of injector and fuel pressure is optimal for the amount of power that you care to produce.

For those who wish to calculate mass flow themselves, we offer the following formula:

F2 = (√P2/√P1) x F1

F2 = New flow rate (lbs/hour or cc/min)
F1 = Old flow rate (lbs/hr or cc/min)

P2 = New Pressure
P1 = Old Pressure

Example: We have an injector rated to flow 315cc/min at 43.5 psi (3bar). That combination does not flow enough fuel to reach our desired output. So, we wish to determine how much will it flow at 58psi (4bar):

F2 = (√58 / √43.5) x 315
F2 = (7.616 / 6.596) x 315
F2 = 364cc/min

Fuelab Adjustable FPR

Fuelab Adjustable FPR

Fuelab Fuel Pressure Regulators are designed for EFI applications running between 1.72-6.3bar (25-90psi) fuel pressure. Use this part to consistently...
$189.00
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VW/Audi Adjustable drop-in FPR

VW/Audi Adjustable drop-in FPR

Dial in your air/fuel ratio while keeping your stock fuel rail. Or, place in a USRT fpr adaptor and use with a high-flow fuel rail. Don't forget...
$65.00
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Fuel Pressure Gauge

Fuel Pressure Gauge

Highly accurate pressure gauge for engine bay placement. Liquid-filled to dampen vibration from the engine. Use T-fitting (not included) to install...
$30.00
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Gauge Adapter

Gauge Adapter

T-fitting allows gauge fitment to stock fuel lines.
$12.00
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FPR Mounting Adapter (6AN)

FPR Mounting Adapter (6AN)

Properly adapt a factory fuel pressure regulator to your high-flow fuel rail with the confidence that it will not leak. This adapter features a trio...
$69.00
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Fuel Rail Fittings Kit (6AN)

Fuel Rail Fittings Kit (6AN)

Complete fitting kit for -6AN fuel rail and our FPR Mounting Adapter. Attach directly to one of our fuel rails and any other. Or, mount remotely....
$45.00
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FPR Adapter Kit (for Schimmel VR6 intake manifoild)

FPR Adapter Kit (for Schimmel VR6 intake manifoild)

Use this adapter kit to fit a standard format fuel pressure regulator to a Schimmel VR6 intake manifold. The main thread is 3/8 NPT. Barbed...
$140.00
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ORB Plug (6AN)

ORB Plug (6AN)

Need to plug the extra -6AN hole in the side of an adjustable fuel pressure regulator or far side of a fuel rail? Use this o-ring sealed plug.
$9.00
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