I need to do some boost logs, to see if my cars been remapped, ive owned my R for a month now, and when i bought it, it had instructions in the manuals for a Revo SPS1
Just need to know what psi its boosting at.
Thanks in advance
Craig.
VAG-COM won't tell you your boost in PSI. It will give you requested vs actual boost via the MAP sensor and the figures are in mbar inclusive of atmospheric pressure. Log block 115 to see these figures.
You will need a fully registered copy of VAG-COM to do this, the demo version won't allow you to log anything over block 10 or so.
1. Connect cable to car, start engine and run the VAG-COM program.
2. Click on "Select Control Module" then click on "Engine".
3. Click on "Meas. Blocks" and select 115 in the first number section. Titles will apear under the 4 little windows, they'll be "Engine Speed", "Engine Load", "Spec. Boost" and "Actual Boost". Note the figure under actual boost at this point and write it down.
4. Click on "log". Start driving. Use a straight piece of "private" road and get into 4th gear at 3000rpm (don't start any lower than this).
5. GET A FRIEND TO DO THIS PART. Click on "Start". You are now logging.
6. Foot to the floor all the way to the rev limiter.
7. GET A FRIEND TO DO THIS PART. Click on "Stop". Click on "Finished Go Back". You can now exit the VAG-COM program.
8. Open the VAG-COM folder on your computer and then open the Logs folder. Your log file should be in there under a name something like "LOG-01-115-xxx-xxx.CSV". Open this file with Microsoft Excel or if you don't have that Notepad will do.
You should see something like this:
Code:
Group B: '115
Engine Speed Engine Load Spec. Boost Actual Boost
TIME 700-6800 RPM 15-150% 990-1800 mbar <=1800 mbar
STAMP /min % mbar mbar
0 1800 22.6 960 980
1.01 1920 41.4 960 960
2.02 2200 96.2 2050 1270
3.04 2680 142.1 2160 1950
4.03 3280 170.7 2180 2220
5.05 3880 160.9 2180 2120
6.06 4440 163.9 2130 2160
7.17 5080 157.1 2060 2060
8.17 5560 152.6 1950 1990
9.18 6000 145.1 1900 1890
10.18 6400 136.1 1910 1850
11.18 6760 131.6 1890 1850
12.2 6160 11.3 960 1070
13.28 5520 12 960 1020
14.4 5080 12 960 1010
15.4 4680 12 960 1010
Find your highest figure in the Actual Boost column. Subtract the actual boost figure you wrote down earlier. The figure you have now is your actual peak boost in millibars, to convert this to PSI, simply divide it by 68.9. In summary, that formula is: Peak Boost at full throttle - Actual boost at idle / 68.9
NOTE: This is only accurate at or around sea level. If you live 7000ft up in the mountains, it won't be accurate.
Hope this helps.
