2 bar vs 3 bar map

[f8tlSHO]

A two bar is good for 29.xxx psi correct? What's the point to change to a 3 bar on the SHO? Pretty sure these tunes are not doubling the stock boost.. Correct me if I am wrong.


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[BiGMaC]

Regardless of boost the 3BAR and tune mods make a better performing car due to more incremental adjustments to the ECU.  2BAR can only read 14.7 psi boost and most people actually cruise at 10-12, but if there is a spike like going WOT the 3Bar can read it and the ECU can use it.  Had mine about a year and love it compared to the 2BAR. The small turbos we have can't generate more than 18-20 psi.

 

[f8tlSHO]

Regardless of boost the 3BAR and tune mods make a better performing car due to more incremental adjustments to the ECU.  2BAR can only read 14.7 psi boost and most people actually cruise at 10-12, but if there is a spike like going WOT the 3Bar can read it and the ECU can use it.  Had mine about a year and love it compared to the 2BAR. The small turbos we have can't generate more than 18-20 psi.

Why can a 2 bar map only read 1 bar worth of psi? 1 bar is 14.5psi


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[SHOdded]

The terms "2 bar" and "3 bar" refer to absolute pressure.  When we talk about boost we talk about pressure over and above atmospheric pressure, which is defined as 1 bar or 14.7 psi.  So a 2 bar sensor can sense 1 bar worth of BOOST (14.7), and a 3 bar can sense 2 bars worth of BOOST (29.4 psi).

 

[f8tlSHO]

My brother has a 15' ecoboost mustang. He said on a 3rd gear pull he can hit 20lbs of boost with a stock tune. They have a 2.5bar map


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[f8tlSHO]

The terms "2 bar" and "3 bar" refer to absolute pressure.  When we talk about boost we talk about pressure over and above atmospheric pressure, which is defined as 1 bar or 14.7 psi.  So a 2 bar sensor can sense 1 bar worth of BOOST (14.7), and a 3 bar can sense 2 bars worth of BOOST (29.4 psi).

So basically the atmosphere is 1 bar..


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[SHOdded]

Correct.

My brother has a 15' ecoboost mustang. He said on a 3rd gear pull he can hit 20lbs of boost with a stock tune. They have a 2.5bar map


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Not the same engine as the SHO, do you know if it is the same turbo?

 

[f8tlSHO]

Yes I know it's a 2.3 single turbo. I highly doubt it's the same turbo. I would imagine it's a little bigger.


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[f8tlSHO]

Correct.

Ok, that solves that....3 bar it is..


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[FoMoCoSHO]

Different turbo, I think it is Twin scroll....

 

[PokerMunkee]

All the tuners recommend it, so I paid $60 and did it. 

 

[f8tlSHO]

I just wanted to make sure it was really needed.. Now that it's explained... 3 bar it is


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[OmaHahn]

I have the MDesign and agree with the sensor issue - mine actually frickin fell out when mounted on the side of the intake tube!!!  The solution was simple though - just rotated the CAI so the rubber grommet hole is directly on top and sensor drops straight down.

 

[BiGMaC]

I have the MDesign and agree with the sensor issue - mine actually frickin fell out when mounted on the side of the intake tube!!!  The solution was simple though - just rotated the CAI so the rubber grommet hole is directly on top and sensor drops straight down.

I just went to Home Depot and bought a tighter grommet on Ahmad's (MDesign's) pre-emptive advise. He changed it for the second and third versions... Either way it's a non-issue as long as the sensor connecting wires will reach it.