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How Does A Boost/Vacuum Gauge Work?


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When your normal driving the engine is sucking ( vacuum ) the you go into wot the engine gives a blowing effect ( boost) that's how the gauge reads only if your boosted in a way, turbo or charged if you have it on a n/a motor there is no boost for it to read

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How does it read boost? When the air in the intake manifold becomes a pressure that is higher than barometric the pressure will move from the intake manifold to the hose and up to the guage. If the guage is working correctly it will show boost.

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  • 5 weeks later...

Hate to bring a topic back up, I'm about to put one on, a Autometer Ultra Lite II Boost/Vac gauge that's mechanical, where did you hook it up at on the manifold?? I mean, where's the best place to tie it into for a good accurate reading??

Edited by Bad Company (see edit history)
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