2012 CCB E63

Hi all,

I have scan tool hooked up to the OBD2 port that is feeding a app on my iPhone called "DashCommand" that allows you to record all the sensors.
I have it displaying a few things, and I was under the impression these cars stock (non p30) make ~14 psi of boost for their rated 517HP?
I am only able to get high 8, almost 9PSI of boost floored on the freeway in 3, 4, and 5th gear.
Is this normal, or low?

2012 CCB E63

Found this text

From here, http://www.roadtesttv.com/drag-test-...e-road-test-tv

2012 merc amg

Is the car under performing? Maybe the number is wrong your getting. I'd think you'd be getting a code if it were that low.

efiftyfizzle

I don't think those apps measure the same boost pressure... or the amount you actually get varies by your altitude, temps, etc.

gaspam

from what i understand on that app is you have to input a few variables when you setup your vehicle such as volumetric efficiency and displacement and the app then interpolates your boost based on map/maf readings so if you have any of your inputs wrong, the calculation is going to be off...

so its not a real boost reading, its an interpolated value

kponti

Yeah those apps read crazy numbers at times. It read over 30psi of boost for me most of the time on the dyno

2012 CCB E63

Interesting,

Now that you mentioned that, I went into the app again, it does say it is 'calculated boost pressure' I will see if I can get actual data out of the MAP/MAF sensor.

Thanks everyone!

KLR CLS

Just remember that with map readings you have to subtract base atmospheric pressure. Ie 1 bar