Okay so I'm in the market for a 5 Bar map I'm trying to find out the difference between the brass 5 bar and the stainless steel 5bar besides the price everything else seem to be the same..

 

MAP/Pressure Sensors | AEM

 

Brass will break easier

 

The brass ones are for instrumentation and reference only. If it's for the ecu to read, you need to use the steel one.

What is your setup? What engine management? Why a 5 bar sensor? Are you really planning to push 60+ lbs of boost?

 

If it's going into the block, head or intake manifold (aluminum). I use the brass ones. Stainless doesn't play well with aluminum.

 

x2

 

88mm bore h22 s366 2000cc injectors on e85 with aem ems goals of 650 whp or more that's the reason for the 5 bar

 

How much boost does it take to make 650?

My point is that you want to use the lowest rated sensor you can get away with while still leaving a little bit of head room. As you increase range, you lower resolution... the steps between points will be bigger and the overall tune will suffer with a sensor that is too large if you don't need the whole range.

I'm really thinking that you might want to go with a stock-style 3 or (more likely) 4 bar map sensor until you know you need a 5 bar, or at least consult your tuner to get an idea of what boost levels you'll be expecting.

In any case, if you do decide to run the AEM as your ecu's MAP sensor you'll need to use the SS version.