Shock Tech: IFP Shocks, Remote Reservoir Shocks and Emulsion Shocks

August 18, 2020

Emulsion Shock

  • Oil and Nitrogen are mixed together in the main shock body.
  • Mixing shock oil and Nitrogen makes the damping inconsistent.
  • Single shock body, no reservoir.
  • Very little room for Nitrogen results in higher pressures.
  • High pressure = high friction = high temperatures = poor ride.
  • Both Nitrogen and shock oil are now being forced through the valving, instead of just oil.
  • Very high pressure makes the seals squeeze hard = wear out quicker.
  • Emulsion shocks are for someone on a budget, and not concerned about performance.
  • Fox discontinued the 2.0 smoothie emulsion shocks.

(IFP) Internal Floating Piston Shock

  • Oil and Nitrogen are separated by a floating piston.
  • Oil and Nitrogen are both in a single shock body.
  • Very little room for Nitrogen. Pressure can get very high.
  • High pressure makes the seals squeeze hard = wear out faster and worse ride.
  • Not as much shock travel because the IFP needs room to move.
  • Nitrogen fill port can be very difficult to access.
  • Most 2.0’s are only rebuildable by the factory (expensive, or not an option)
  • IFP shock would be adequate for a mostly street driven vehicle that sees very little high speed off-road use. These are considered a “throw away” shock once they are worn out.
  • Average price for an OEM fit 2.0 Fox IFP Shock $170/each

Remote Reservoir Shock

  • Oil and Nitrogen are separated by a floating piston inside the reservoir
  • Main shock body dedicated to oil. Secondary reservoir holds some oil and mostly nitrogen.
  • Nitrogen in reservoir keeps pressure on the shock oil in the main body. Pressure is stable
  • Nitrogen pressure helps with tuning, forcing oil through the main piston valving.
  • Stable pressures keep the shocks seals happy, and will last longer than IFP & Emulsion shocks
  • Reservoir shocks come in a variety of shock sizes & lengths. 2.0, 2.5, 3.0, 4.0 
  • Piggyback shocks are also considered a remote reservoir shock
  • Reservoir shocks have an option to add a compression adjuster (DSC or Mid Speed)
  • Most Fox and King remote reservoir shocks are fully serviceable & tunable
  • Remote reservoir shocks should be used on any vehicle that wants better performance and comfort. Endless tuning options allow for the best ride quality.
  • Average price point for a 2.0 Aluminum Body Smoothie Shock: $280.00/each
King Racing Shocks tuned from AccuTune Offroad