Difference between revisions of "Boost gauge"
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A '''boost gauge''' is a dashboard mounted instrument that indicates [[turbocharger]] or [[supercharger]] boost [[pressure]] in an [[internal combustion engine]]. | A '''boost gauge''' is a dashboard mounted instrument that indicates [[turbocharger]] or [[supercharger]] boost [[pressure]] in an [[internal combustion engine]]. | ||
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A Boost gauge will measure pressure in either [[pound-force per square inch|psi]] or [[bar (unit)|bar]] and many also measure manifold [[vacuum]] also in.Hg | A Boost gauge will measure pressure in either [[pound-force per square inch|psi]] or [[bar (unit)|bar]] and many also measure manifold [[vacuum]] also in.Hg | ||
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== See also == | == See also == | ||
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* [[Pressure gauge]] | * [[Pressure gauge]] | ||
* [[Rallycross]] | * [[Rallycross]] | ||
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[[Category:Auto parts]] | [[Category:Auto parts]] | ||
[[Category:Measuring instruments]] | [[Category:Measuring instruments]] | ||
Latest revision as of 07:43, 8 October 2009
A boost gauge is a dashboard mounted instrument that indicates turbocharger or supercharger boost pressure in an internal combustion engine.
A turbo- or supercharger are both engine driven air compressors and provide varying levels of boost according to engine rpm, load etc. Quite often there is a powerband within a given range of available boost pressure and it is an aid to performance driving to be aware of when that powerband is being approached, in the same way a driver wants to be aware of engine rpm.
A boost gauge is mandatory when boost pressure is being modified to higher levels 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 open longer. To avoid excessive leaning out of the engine (caused by increasing the boost beyond the fuel systems capacity) care must be taken to monitor boost pressure levels, along with o2 sensor levels.
A Boost gauge will measure pressure in either psi or bar and many also measure manifold vacuum also in.Hg
See also