NB Boost sensor (Factory MAP sensor) calibration
#1
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NB Boost sensor (Factory MAP sensor) calibration
Does anyone here have the NB factory map sensor calibration? I was looking at putting a MS3Pro module in the factory ECU case and the module does not come with a map sensor. I was wondering if anyone has used the factory map sensor with a megasquirt.
This would come in handy for anyone running in an autocross class where you cannot add/modify map sensors etc.
This would come in handy for anyone running in an autocross class where you cannot add/modify map sensors etc.
#3
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Yes, it will be a N/A only car. Thanks for the information too. I am in the planning stages of swapping in a VVT motor, similar to what I have in my NA Racecar. Going to be sweet to have the same 145hp, but with A/C and a radio as a daily driver!
#5
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'99+ have a "Boost Sensor" mounted on the fender above where the evap canister is located.
MX-5 Miata Forum
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However, if someone does not have the data already, I should do that work.
Figured I'd just put it on a tee with the MS and a vacuum / pressure source, plot a curve, calculate the calibration constants, and publish them. I think Thumpetto007 is going to need them as well.
Honestly, it might be a month before I get to it. So whoever gets there first.
#15
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no, the ECU uses it. On the MSM mazda even refers to is at the "BAROMETRIC PRESSURE (BARO)/MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR", and not just the BOOST sensors on the other NB2s -- but it's the identical sensor and plumbing.
There's references that it uses it for fuel trims. Looking for that now, but the ECU at least knows that car goes into boost -- what it does with that knowledge is beyond me.
There's references that it uses it for fuel trims. Looking for that now, but the ECU at least knows that car goes into boost -- what it does with that knowledge is beyond me.
#18
Overboost is set by load I believe which is maf voltage + rpm. If it's the same sensor, and the sensor reads to 115kpa only, even if it did use it I bet it would only be a CL/OL trigger. Which it's not, cause we already confirmed CL/OL is triggered by the TPS on those cars. I am open to be proven wrong, but you'll need some proof.
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I'm going to plug in Rev's numbers. Likely within the week (schedule update) I'll have the MS at least temporarily hooked up to test spark and injector harness updates. At that time, I'll have a borrowed, hand vacuum pump and be able to compare the internal MAP values with this sensor's readings.
Note, Rev's values are quite close to the GM 1 BAR values, so if it is indeed a 1 BAR sensor, the numbers make sense.
Note, Rev's values are quite close to the GM 1 BAR values, so if it is indeed a 1 BAR sensor, the numbers make sense.