Boost Pressure Switch (Hobbs Style), Normally Open (NO), 5psi or 15psi, 1/8 NPT or Vacuum Nipple, Relay Trigger for Water Methanol Injection
Boost Pressure Switch (Hobbs Style), Normally Open (NO), 5psi or 15psi, 1/8 NPT or Vacuum Nipple, Relay Trigger for Water Methanol Injection
Boost Pressure Switch (Hobbs Style), Normally Open (NO), 5psi or 15psi, 1/8 NPT or Vacuum Nipple, Relay Trigger for Water Methanol Injection
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  • Load image into Gallery viewer, Boost Pressure Switch (Hobbs Style), Normally Open (NO), 5psi or 15psi, 1/8 NPT or Vacuum Nipple, Relay Trigger for Water Methanol Injection
  • Load image into Gallery viewer, Boost Pressure Switch (Hobbs Style), Normally Open (NO), 5psi or 15psi, 1/8 NPT or Vacuum Nipple, Relay Trigger for Water Methanol Injection

Boost Pressure Switch (Hobbs Style), Normally Open (NO), 5psi or 15psi, 1/8 NPT or Vacuum Nipple, Relay Trigger for Water Methanol Injection

£26.00
£26.00
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Take control of boost-activated hardware with the Standard Hobbs Switch from Nforcd. This compact, normally open pressure switch closes at a set boost point to trigger accessories such as a secondary fuel pump or to add an extra safety layer for water methanol injection systems. Simple to install and highly effective, it is a popular choice for turbocharged and supercharged builds.

  • Available with 1/8 inch NPT thread or vacuum nipple connection
  • Choose your activation point: preset 5 psi or 15 psi
  • Normally open circuit that closes at the selected boost level
  • Rated up to 6 amps, ideal as a relay trigger for higher current devices
  • Great for secondary fuel pump staging and WMI flood protection
  • Clean, straightforward installation for boost-referenced control

Recommended uses:

For WMI safety, select the 5 psi option and run the solenoid ground through the switch so the solenoid can only open when the WMI system requests flow and boost is at or above 5 psi. For staging a secondary fuel pump, choose the 15 psi option and use the switch to trigger a 30 amp automotive relay rather than powering the pump directly.

What is a Hobbs switch? It is a simple on off boost pressure switch. In this case it is normally off and closes at a defined pressure to provide a ground signal for your chosen accessory or relay.

Basic wiring overview:

  • Connect one terminal to a solid chassis ground.
  • Connect the other terminal to the ground trigger wire of the accessory or relay.

Order your Standard Hobbs Switch from Nforcd today for reliable, boost-referenced control. Professional fitting and wiring are available at Nforcd in Warwickshire. To request a quote, email Sales@nforcd.com.