Boost gauge

Source: Wikipedia, the free encyclopedia.
Boost gauge on a Ford Focus RS (left)
30 psi Boost gauge
Top: Turbo/APC boost gauge in a Saab 900

A boost gauge

boost pressure[2] in an internal combustion engine. They are commonly mounted on the dashboard, on the driver's side pillar, or in a radio slot.[3]

Turbochargers and superchargers are both engine-driven air compressors (exhaust-driven or mechanically driven, respectively) and provide varying levels of boost according to engine rpm, load etc.[4] Quite often there is a power band within a given range of available boost pressure and it is an aid to performance driving to be aware of when that power band is being approached, in the same way a driver wants to be aware of engine rpm.[5]

A boost gauge is used to ensure excessive pressure is not being generated when boost pressure is being modified to levels higher than OEM standard on a production turbocharged car. Simple methods can be employed to increase factory boost levels, such as bleeding air off the wastegate diaphragm to 'fool' it into staying closed longer, or installing a

air-fuel ratio meter that monitors the oxygen sensor.[7]

A boost gauge will measure pressure in

psi, bar or kPa; many also measure manifold vacuum pressure in inches of mercury (in. Hg) or mm of mercury (mm Hg).[3]

See also

Notes

  1. ISBN 0-83760-160-6
    .
  2. ISBN 1-56091-683-4
    .
  3. ^ a b Knowling, Michael (7 October 2008). "Basic Hands-On - How to Fit a Boost Gauge". www.autospeed.com. Retrieved 15 May 2024.
  4. ^ Markus, Frank (5 March 2024). "Turbocharger vs. Supercharger: What's the Difference?". www.motortrend.com. Retrieved 15 May 2024.
  5. ^ Voronov, Dmitry (2 April 2019). "Forcing the issue: Making big power around a road course". BBA Media. Retrieved 15 May 2024.
  6. ^ "How Does a Boost Controller Work?". Turbosmart. 27 October 2021. Retrieved 15 May 2024.
  7. ^ Neophytou, Stavros (20 October 2023). "Air Fuel Ratio Guide: How To Keep Your Engine Safe". Kelsey Media Ltd. Retrieved 15 May 2024.
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