MAP Sensors

so how does the BARO back up the MAP from inside the glovebox?

like i said earlier, I do not know EXACTLY how it operates, and I dont have a datasheet of the MAP or BARO sensors to comment further.

I ask you this, why do all manuals group these two sensors together?
Why does the code group these together?

As a stretch, why can G-sensors be mounted inside the car and give a reading also?

I dont have the answers, Perhaps you can enlighten us all !

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Originally Posted by ProECU

I know for a fact that the BARO sensor is used in the code as a backup to the MAP sensor when there is a problem with the MAP sensor.

I dont actually know what the BARO does, exactly, however it must function similar to the MAP based purely from what ive seen in the code.

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see my friend - you might need to get a clue,

if you are basing your comments COMPLETELY on your *interpretation* of the code,

and i am basing it on what someone else has written - and accords with commonsense.

whilst i completely admit that i may have been wrong in this thread, maybe it is my turn to be right about the BARO?

nice info tinker. question: The baro is limited to atmo level pressure ie anything less than 100kpa, 1000mbar or 1 bar absolute as u can tell that it takes inches of mercury as its reading? Or can the baro read above inches of mercury and take above 100kpa?

btw, im still thinking about how the NA engine can see "boost" without an externally generated force that makes the cylinder take above 100% VE. Theoretically, I dont see how.

Not having a go at ya dave, just asking. i think its great we having this talk :)

You are not right about the BARO! :)

thanks for that, what would you like to be enlightened about that is not contained in the excerpt copied from the tech2tech site?

it says they are the same sensor, and measure the same thing, and are used to trim the PW of the injectors, but the MAP has the most biggest influence on PW by far...

Both the BARO and MAP sensors can see boost in absolute terms.
The max the MAP can see is about (approx) 1700mBar and since BARO shares the same voltages, (and i think Honda intended it whis way) so too can the BARO.

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Originally Posted by pornstar

btw, im still thinking about how the NA engine can see "boost" without an externally generated force that makes the cylinder take above 100% VE. Theoretically, I dont see how.

:)

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through a carefully designed intake and only when the car is moving (probably rapidly)...

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it is through 'ram air'

imagine the throttle open and you blowing air at 200km/h towards this open throttle,

similar to a turbo perhaps?

yes, it will only be marginal, but *theoretically* it is possible.

and is used most *practially* on motorbikes.

Quote:

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Originally Posted by ProECU

Both the BARO and MAP sensors can see boost in absolute terms.
The max the MAP can see is about (approx) 1700mBar and since BARO shares the same voltages, (and i think Honda intended it whis way) so too can the BARO.

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so what is your point?

the BARO is not the backup for the MAP sensor...

Quote:

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Originally Posted by ProECU

like i said earlier, I do not know EXACTLY how it operates, and I dont have a datasheet of the MAP or BARO sensors to comment further.

I ask you this, why do all manuals group these two sensors together?
Why does the code group these together?

ANSWER: 'cause they are the same sensor, like the ECT sensor and IAT sensor are.

As a stretch, why can G-sensors be mounted inside the car and give a reading also?

ANSWER: due to them not measuring changes in air pressure

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