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Published: May 11, 2012

A boost gauge can be a very useful tool for measuring your turbo pressure output. Fitted correctly can be ideal for tuning purposes & look great!

A Typical Boost Gauge, Mounted on the ‘A’ Pillar

Boost gauges are usually supplied with a fitting kit which typically includes the gauge itself, a ‘T’ piece & a couple meters length of pressure pipe.
Tools needed for the job may include: screwdrivers, cutters tie wraps etc & a hammer for when it all goes wrong!

Firstly you need to decide a suitable location for your gauge; The ‘A’ pillar is a common choice along with the dash or the steering column.

Now you have a suitable location- plan a route for the pipe from the gauge to the engine bay, taking precautions to avoid the pedals & other moving parts.
To get the pipe thought the bulkhead it may be easiest to utilise a previous hole which may have a grommet containing wires (take care not to damage them!), simply make a small hole- big enough for the pipe to go through.

Once in the engine bay you must find a ‘manifold pressure pipe’, the most common would be the ‘waste gate actuator’ pipe, this runs from the inlet manifold to the actuator (maybe via a bleed valve, but that’s not important).
To connect you boost gauge pipe to this pipe you must use the T piece provided in the kit, - cut the actuator pipe & put the T piece to join them, and then connect the boost gauge to the third outlet on the T.

Next secure the pipe along its route against vibration & heat (using tie wraps or similar)
Mount the gauge in it location (many mounting pods & holders available).

Now you’re ready to test it!
Start the engine, the gauge should read around -.75 bar (-11psi),
Allow your engine to warm up and take it for a drive (its pretty difficult to obtain boost with no load) give you car some full throttle and the needle should quickly go to ‘0’ then start to rise! Hurrah you have a boost gauge!

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