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      04-21-2013, 10:20 PM   #1
Chriskm3
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P3 boost gauge.

How to verify the boost reading shown by p3 gauge. My biost reading are high co pared to olther identical kits and more importantly the readung seems to flauctuate every pull. My gauge version is 2. Not the 2.1 which allows for self calibration within the configuration menu. Would a mechanical gauge be more precise ? Does a 2.1 version gauge utilize same boost sensing hardware?
Thanks guys. Stay safe
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      04-22-2013, 12:21 PM   #2
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I'm not sure which settings you have available, but you want to ensure that your Boost reading is set for Analog and select the N54 engine (same parameters for the readings that are displayed on the gauge).
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      04-22-2013, 05:52 PM   #3
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M33 pointed out to me that the P3 doesn't read accurately if you try to get a reading after redlining and shifting to the next gear. To get an accurate reading of max boost you should redline the car and then ease off the gas, not shift. Just wait like 5 seconds or so after redlining and then press the recall button. My readings were much more accurate this way.

Hope this helps.
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      04-22-2013, 06:17 PM   #4
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Quote:
Originally Posted by NikB316 View Post
M33 pointed out to me that the P3 doesn't read accurately if you try to get a reading after redlining and shifting to the next gear. To get an accurate reading of max boost you should redline the car and then ease off the gas, not shift. Just wait like 5 seconds or so after redlining and then press the recall button. My readings were much more accurate this way.

Hope this helps.
Great. Thanks I'll give it a shot.
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      04-22-2013, 07:18 PM   #5
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thats correct! shifting creates a boost spike because of the vanos system. redline it and let off gas then hit recall. Mines accurate....
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      04-24-2013, 11:41 AM   #6
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Mine does the same thing. my gauge is saying I boost 7.5psi on a 550 vt1 kit. I believe this boost gauge is reading a bit high
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      04-24-2013, 02:51 PM   #7
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You either have to stare at it or just let off the gas at redline. If you shift, you'll record a spike as posted above.
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      02-27-2016, 09:46 AM   #8
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It's been happen with me I had 9.0 PSI as spike,today I will let gas before shift
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