Inaccurate 4bar Map Sensor

[moruha]

Hi, just one question, is there a way I can match the reading in the MAP Sensor and in my Boost gauge, the problem is that my boost gauge is reading 9 psi of boost while the Map sensor only read 5 psi..

Is there a way to correct this??

Thanks in advance

[Spunkster]

No there is not. Is this a mechanical or electronic gauge?

[moruha]

its a mechanical gauge.

[Spunkster]

Where is the pressure source for the gauge?

[Hondata]

Also : what elevation are you at?

[moruha]

from here:

<a href="http://s105.photobucket.com/albums/m207 ... G_0337.jpg" target="_blank"><img src="http://i105.photobucket.com/albums/m207 ... G_0337.jpg" border="0" alt="Photobucket"></a>

http://i105.photobucket.com/albums/m207 ... G_0337.jpg

And my elevation is 2240 meters (7350 ft) above sea level.

[Hondata]

I can't see where you boost gauge is connected, but the difference is because of the way your boost gauge reads and your elevation.

The MAP has an absolute reference, so 5 psi is 5+14.7 = 19.7 psi absolute.

The boost gauge reads boost relative to atmospheric pressure, which is 78 kPa / 11.2 psi absolute. So at 19.7 psi absolute pressure, the boost gauge will read 19.7-11.2 = 8.5 psi relative, which is close to what you said it reads.

[moruha]

thnks for the explanation...

Just one more thing, so how much boost Iam actualy getting into the engine, 9.5 or 5?

Thanks ind advance.

[Hondata]

19.7 psi absolute pressure, so 5 psi as sea level.

[moruha]

thank U for all the explanation and your time!