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Monitoring Air Flow with ITB's?

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Old 09-07-2006 | 03:57 PM
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Default Monitoring Air Flow with ITB's?

I have been doing some research and this is the conclusion I have come to regarding monitoring air flow using ITB's so that the ECU can monitor fuel:

Vaccuum hoses are linked to each inlet to the motor that go to a MAP sensor.

Is this a correct statement?
Old 09-07-2006 | 04:14 PM
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This is not correct in terms of a 350Z. The Z runs a MAF (Mass Air Flow) sensor, not a MAP (Manifold Absolute Pressure) sensor.

Now if you're going with a stand alone ECU, then yes, you can run a vacuum line to a MAP sensor and that, combined with the TPS, will tell the ecu what it needs to know.

Originally Posted by Quamen
I have been doing some research and this is the conclusion I have come to regarding monitoring air flow using ITB's so that the ECU can monitor fuel:

Vaccuum hoses are linked to each inlet to the motor that go to a MAP sensor.

Is this a correct statement?
Old 09-07-2006 | 04:22 PM
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I am aware of the MAF v. MAP sensor thing. Cant you run a MAP sensor with the UTEC?
Old 09-07-2006 | 04:40 PM
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I remember somewhere I read that MAF's are used for better drivability.

However, if I remember correctly, there is some car manufacturer (Lincoln I think) if not a few that use MAP's to run the car and they are not boosted cars either.

Again, I could be wrong.
Old 09-09-2006 | 10:22 AM
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many Honda's run MAP sensors as well, non boosted

pick your posion..plusses and minusses to each
Old 09-09-2006 | 10:03 PM
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Originally Posted by Quamen
I have been doing some research and this is the conclusion I have come to regarding monitoring air flow using ITB's so that the ECU can monitor fuel:

Vaccuum hoses are linked to each inlet to the motor that go to a MAP sensor.

Is this a correct statement?
The ports can be connected together for a map signal,
Small lines to a common small plenum of sorts.
but anytime you are using ITB's, the use of a map sensor is very limited,
as you open 6 throttles, you lose your vacuum signal fairly quickly,
so hard to tune with the map sensor.
Most common to use TPS and RPM for tuning of engine.
The vacuum source you have from connecting 6 ports can still be used for power brakes etc.
And to use a MAF sensor will or could restrict airflow to a set of ITB's as well be sensitive to back flow from ITB's, large cams etc.
ITB's have a gulp factor that a MAF sensor can not keep up with
(Reaction time to the ITB's)

LHP
www.haywardperformance.com
Old 09-10-2006 | 09:29 AM
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I personally have only seen the use of MAP sensors linked to a common plenum. I was not fully aware that TPS and RPM were used together to tune so much.

It is really nice to find that out.
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