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Old 09-21-2015, 06:05 PM   #1
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Default Run boost gauge from ECU MAP?

Hey everybody. I tried to search for this but I couldn't find anything on here (or on msextra).

Just curious if it is possible to run a digital boost gauge based on the MAP being read by the ECU. I'd assume you could just program an output in tunerstudio to send a voltage signal based on what the gauge expects to see from its sensor, but I may be totally wrong.

Reasons:
- only one vacuum line
- consistent pressure between gauge and ECU

Is anybody doing this?
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Old 09-21-2015, 06:07 PM   #2
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<p>The best way to do this is over CAN-bus and an arduino. As far as I know you can't just output a variable voltage based on a parameter.</p>
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Old 09-21-2015, 06:09 PM   #3
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not that I know of, because:
-doesn't matter as long as they're not leaking
-no one really cares about the boost gauge when tuning anyway, and even in normal driving it's more for economy or entertainment than anything else.
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Old 09-21-2015, 06:39 PM   #4
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Fair enough. Yeah I don't really care about monitoring the b00stz in real time besides for entertainment value. I haven't ordered a 2nd gauge to fill my other slot yet, so I'm considering something more sensible, like oil temp/pressure.
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Old 09-21-2015, 06:42 PM   #5
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I kept going back and forth on deciding on a boost gauge for the MSM and ended up not even bothering.
Tune was stop on so it's not like I had to let to actually monitor boost real time.
But you can probably pick up a cheapie to blink cool lights at you lol
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Old 09-22-2015, 11:53 AM   #6
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I did this...it leaked...screwed up everything (and I didn't know it for a long time). It's just another point of failure IMHO. Skip the boost gauge - get an oil pressure (and temp) gauge and profit.
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Old 09-22-2015, 12:02 PM   #7
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Default Run boost gauge from ECU MAP?

I have it teed off the MAP sensor line. I use a gauge because I have an adjustable EBC. And I have occasionally been happy to have it for troubleshooting (coupler blew off or wastegate not shutting completely). I at least knew why the car was behaving strangely and that I could continue back to the paddock rather than worrying about the engine.

I often adjust to run lower boost on the track to preserve the car so a gauge and an adjustment dial suit my needs.
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