Stock ECU & TMAP

[gmustangt]

Can the OEM TMAP & OEM ECU read and make adjustments on pressure signals?

Or since intended use was for vacuum only, the ecu will only read vacuum and can't process a pressure signal?

*I'm talking a 100% stock ECU, not a reflash*

 

[tdbaugha]

It reads absolute pressure. Manifold Absolute Pressure (MAP). So "vacuum" is still a positive value. Pretty sure it only reads up to ~1.25 bar. So you can't use it boosted.

 

[inspector01]

Can the OEM TMAP & OEM ECU read and make adjustments on pressure signals?

Or since intended use was for vacuum only, the ecu will only read vacuum and can't process a pressure signal?

*I'm talking a 100% stock ECU, not a reflash*

I have not looked at the tables inside the stock Polaris Ecu, but from experience with others, speed density setups on N/A engines are usually mapped up to say ~15 psia, but the sensor can still read above that, it will just run the same values as it would at 15psia. So essential yes, the ecu can read it, but it will run the same values for anything above 15psia. I would assume it's likely similar on these.

 

[gmustangt]

I have not looked at the tables inside the stock Polaris Ecu, but from experience with others, speed density setups on N/A engines are usually mapped up to say ~15 psia, but the sensor can still read above that, it will just run the same values as it would at 15psia. So essential yes, the ecu can read it, but it will run the same values for anything above 15psia. I would assume it's likely similar on these.

This^, is a better way of putting it.

Like you said im curious to the values in the polaris table. I know the bosch tmap can do it, but dont know on the polaris table values.

If the ECU is mapped to 15psia as a max. Then regardless of 15psia, 20psia, or 25psia the input would be the same.

 

[ez-ryder]

I remember a post by someone. They had bought turbo kit for a dragon.
The PO had the stock map sensor in the charge tube.
It ran but with a check engine light on.

 

[gmustangt]

Found my answer.

The polaris table is mapped to 14.7psi (sea level) and thats it.

It is an absolute sensor , so it could read boost from a turbocharger above sea level.