NB Boost sensor (Factory MAP sensor) calibration
#25
I will ask Forscan developers change the PID name in the next revision.
and it reads second IAT(after intercooler) on MSM(this is not actual for aftermarket ECU owners )
#30
Retired Mech Design Engr
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And for the empirical engineering
I started with that, with the MAP in the MS and the "Boost Sensor" connected together with a vacuum pump.
To get them to read together from 61 to 98 kPa, i ended up with these values:
0 = 3
5 = 119
Of course, I'm really only interested in 85 to 102 where I'm going be driving.
Boost Sensor Connected to tube from Manifold
Tube from Boost gauge ready to be connected to vacuum pump
Low end: MAP = 69, Baro =68
High end: MAP = Baro = 98
To get them to read together from 61 to 98 kPa, i ended up with these values:
0 = 3
5 = 119
Of course, I'm really only interested in 85 to 102 where I'm going be driving.
Boost Sensor Connected to tube from Manifold
Tube from Boost gauge ready to be connected to vacuum pump
Low end: MAP = 69, Baro =68
High end: MAP = Baro = 98
#31
Necro thread resurrection; does anyone know if there's a 2- or 3-bar sensor that is physically plug n play on the OEM harness? Rev has confirmed that the MS3 mini can read the stock baro sensor. I would prefer to run a short line from the IM and use this as a MAP with the on-board sensor on the MS3 acting as a baro correction device (yeah I am ---- like that).
#32
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The Baro sensor on that comes on the Miata is part of the pollution control system. It is called a boost sensor, but it is only a little over 1 BAR. I am using it for my Baro sensor. So no, you cannot connect it to the IM and use it for MAP. You have to do it the other way around. Use the onboard for MAP, and the other for baro.
Here is the pertinent thread on calibration
Here is the pertinent thread on calibration
#33
It might work on a naturally aspirated motor, definitely not on a turbo one.
If you really want to avoid running vacuum lines or additional wires through the firewall you could remove the OEM MAP sensor and install an off-board sensor (like the GM 3-bar one) in its place. You would need to adapt the wiring harness somehow, ideally by sourcing the proper connector to build a short adapter harness.
--Ian
If you really want to avoid running vacuum lines or additional wires through the firewall you could remove the OEM MAP sensor and install an off-board sensor (like the GM 3-bar one) in its place. You would need to adapt the wiring harness somehow, ideally by sourcing the proper connector to build a short adapter harness.
--Ian
#34
@DNMakinson thanks! I am aware of that; this thread prompted my question, hence my post here.
Exactly what I was thinking; just wondering if there was any electrically compatible 3 bar sensor out there that would save me the "hassle" of building an adapter harness. Reasoning is that it would be cleaner/easier than running a vacuum line to the MS.
It might work on a naturally aspirated motor, definitely not on a turbo one.
If you really want to avoid running vacuum lines or additional wires through the firewall you could remove the OEM MAP sensor and install an off-board sensor (like the GM 3-bar one) in its place. You would need to adapt the wiring harness somehow, ideally by sourcing the proper connector to build a short adapter harness.
--Ian
If you really want to avoid running vacuum lines or additional wires through the firewall you could remove the OEM MAP sensor and install an off-board sensor (like the GM 3-bar one) in its place. You would need to adapt the wiring harness somehow, ideally by sourcing the proper connector to build a short adapter harness.
--Ian
#35
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OK. I am pretty sure that there are (2) allowable external MAP sensors allowed on the MS3 Basic; but I don't know about the mini. Point being, that just because the mini can read the Baro, does not mean it can be mapped to the MAP input. Just not sure.
#37
What do you mean by "electrically compatible"? I doubt you'll find a 3 bar sensor that has the Mazda connector on it, if that's what you're asking.
You don't really care about the response curve (volts per unit of pressure) because you're not going to run it with the stock ECU, right?
The voltage supplied to the sensor might be an issue. I *think* the GM sensor takes 5 volts in, but I don't know what Mazda supplies to the OEM sensor. That might be an issue.
--Ian
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