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Saw BoostPressureActual hit 2455.82. I assume this is in millibar?
Thread Starter
AudiWorld Super User
Joined: Apr 2002
Posts: 2,712
Likes: 7
From: Birmingham, AL
Saw BoostPressureActual hit 2455.82. I assume this is in millibar?
What is that in PSI? I looked at the calculators online and it gave me something ridiculous like 35PSI.... I've got the log if anyone would like to see it... There is an application out there that Ray from Bham has and I can't find it. His numbers looked right. Help?
Thread Starter
AudiWorld Super User
Joined: Apr 2002
Posts: 2,712
Likes: 7
From: Birmingham, AL
The car seems to be acting better now for some reason. First gear is gone in a bout a second...
2nd is gone in about what seems to be ~2.5 seconds...
It still doesn't seem quite right... Now that I have ECUx running and know how to use it, I will log it and see what all you guys think.
It still doesn't seem quite right... Now that I have ECUx running and know how to use it, I will log it and see what all you guys think.
AudiWorld Expert
Joined: Mar 2000
Posts: 29,189
Likes: 5
From: Raleigh, NC
best thing to do is to log the ambient pressure, and subtract that for each log
That's how I have my ECUx graphing set up, ensuring that no mater what the ambient pressure is, the displayed relative boost is always correct.
My boost (PSI) graphs show this data:
Act_Boost_PSI:
=(L2-J2)*14.5/1000
=(BoostPressureActual-BaroPressure)*14.5/1000
where BoostPressureActual & BaroPressure are ECUx variables that are logged in mBar. REgardless if the current barometer pressure is 1000 mBar, 700mBar (Colorado?), or anywhere in between, my PSI graphs account for it and show real relative boost pressure.
<img src="http://ctny.audiworld.com/mark/s4/ecux/graphs/boost_mbar.GIF">
<img src="http://ctny.audiworld.com/mark/s4/ecux/graphs/boost_psi.GIF"><ul><li><a href="http://ctny.audiworld.com/mark/s4/ecux/">http://ctny.audiworld.com/mark/s4/ecux/</a</li></ul>
My boost (PSI) graphs show this data:
Act_Boost_PSI:
=(L2-J2)*14.5/1000
=(BoostPressureActual-BaroPressure)*14.5/1000
where BoostPressureActual & BaroPressure are ECUx variables that are logged in mBar. REgardless if the current barometer pressure is 1000 mBar, 700mBar (Colorado?), or anywhere in between, my PSI graphs account for it and show real relative boost pressure.
<img src="http://ctny.audiworld.com/mark/s4/ecux/graphs/boost_mbar.GIF">
<img src="http://ctny.audiworld.com/mark/s4/ecux/graphs/boost_psi.GIF"><ul><li><a href="http://ctny.audiworld.com/mark/s4/ecux/">http://ctny.audiworld.com/mark/s4/ecux/</a</li></ul>
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