Topic: How to calibrate (zero) your Defi Boost Gauge. (requires Defi-Link)

[GrantC]

Defi Boost Gauge Recalibration

If you are using Defi-Link electric gauge (not a mechanical),
you can let your control unit to learn 0 pressure point.

So, please try following way.

If you are using 1st generation control unit

(1)Turn your ignition switch to “ON” (but do not start engine)
(2)Select your Turbo gauge to configure warning value (LED on Turbo
gauge
blinking fast)
(3)Press REC and PEAK switch same time more than 2 seconds.
(4)Finished learning Zero point.

If you are using 2nd generation (=Control Unit II) control unit

(1)Turn your ignition switch to “ON” (but do not start engine)
(2)Select your Turbo gauge to configure warning value (LED on Turbo
gauge
blinking fast)
(3)Press REC and DOWN switch.
(4)Finished learning Zero point.

Found at: http://www.honest-bob.com/hands-on/defi-boost-gauge-recalibration

Big props to mars636 for even letting me know this is possible!

[Sleeper]

Very cool. Thanks Grant and Mars. I'll have to do this when the car returns.

[GrantC]

Yea, if they were zero'd out at Rocket then they'll definitely be off by a bit. 

[RedlineMenace.]

Just out of curiousity, how does the Electronic boost gauge get a boost reading? Does it tap into the ECU?. My Defi boost gauge is the mechanical one. I try to avoid that witch craft electrical stuff.

[GrantC]

The same as any other boost gauge. It tee's off a reference like the line going to the BPV.

On a mechanical gauge the hose runs all the way to the gauge. On an electronic gauge the hose runs to a sensor and the wires from it go to the gauge.