Tried doing a search and to many threads came up so maybe someone knows of a thread and can link it for me, but what exactly does a 3-bar/4-bar/7-bar map sensor do? I have seen multiple threads where people suggest getting one or praise them but I have never seen a thread as to there actual function. I have also tried reading several vendor sites and they to are vague about what the sensor actually does. Can anyone help me out on this because if it does what I am thinking then I would like one but I do not want to waste money on vodoo hear say. Thanks for any input.

 

Reads pressure that is all

 

people who datalog use it to monitor boost since gauges are usually not as accurate. Stock MAP sensor only does 1 bar i think, not 100% sure. Unless you have an X.

 

So this doesn't do what I thought, glad I didn't order one. So this sensor is kind of pointless unless you log. Thanks.

 

What exactly did you think it provided?

 

1 bar is equal to roughly 14.5psi. the reason people get the 3 bar map sensors is because they are able to read higher pressures more accurately and it will allow you to log boost when you do data logs. all it is is a pressure sensor with a higher range.

 

Lets not forget we live in a 1 bar atmosphere environment too so it really only reads vacuum to ambient pressure with 1 bar. Most people get confused with the psi name stake since they only think in terms of relative pressure.

There are some other benefits to getting a pressure sensor such as the ability to go SD if thats a path thats desired. The additional IAT sensor would be required if you did though.

Edit:
Oh i guess i should mention boost control too if thats something you want to do which is controlled via a psi setting instead of load.

 

Ok my thinking was that the sensor would be used to eliminate a MBC and possibly reduce the chance of boost creep/spike but it sounds like that thinking is wrong.

 

Thats a 3 port solenoid that does the boost control.

We have a patch that allows you to control the boost with the pressure sensor and a 3 port for the ultimate in control. So in a sense you are looking at half the problem.