Radium Engineering FPR Spring- Wide Range | Universal (18-0046)

An adjustable regulator's range lives in its spring, and this one widens it.

The Radium Engineering FPR Spring, Wide Range is the tuning spring for Radium adjustable fuel pressure regulators: swapping into the regulator to shift its adjustment window, opening base pressure settings the standard spring does not reach. The service and setup part for systems whose pressure targets sit outside the factory-fitted range.

What You'll Feel

• Base pressure targets reached that the standard spring could not hold
• The regulator matched to unusual injector, pump, or fuel-system math
• A serviceable regulator staying serviceable, springs swapping instead of regulators replacing

Features

• Wide range spring for Radium adjustable fuel pressure regulators
• Shifts the regulator's base pressure adjustment window
• Direct service part; verify compatibility with your Radium FPR model

The Details

Regulator springs set the force the diaphragm balances against, and the adjustment screw only moves within the spring's authority, which is why unusual targets need the spring swap rather than more screw: the wide range spring re-centers the window. Installation follows Radium's regulator service procedure, with pressure verified on a gauge after reassembly and the vacuum reference behavior confirmed before the tune leans on it. Match the spring to your specific Radium FPR model per the documentation.

Kit Includes

• 1x Wide range FPR spring (18-0046)

Applications

• Radium adjustable fuel pressure regulators (verify model compatibility)