Specified Vs actual Boost figures

[jimbamboon]

Hi guys, i've been having what i think are some issues with my boost not 'feeling' like its not pulling as strong as it used to be. I ran a log on VCDS in 3rd gear and have attached the results. Do my requested versus actual values look ok? Sometimes actual seems to under read and sometimes over read. What about the duty cycle of the N75?

Thanks in advance

TIME stamp RPM Load Requested boost Actual Boost N75


1.17 960 24.1 1000 1010 0
2.08 1600 71.4 1180 1010 100
2.99 1840 88 1660 1150 100
3.9 2160 109 2050 1350 100
4.8 2560 141.4 2230 1710 100
5.71 3080 191.7 2240 2530 77.3
6.61 3640 191 2300 2270 78.8
7.52 4240 189.5 2290 2280 79.2
8.42 4800 188 2240 2200 82
9.33 5400 18 1000 1960 99.6

 

[Dan1720v]

That looks fine boost wise.

 

[jimbamboon]

Perhaps it's my lack of understanding but I converted the mbar values into psi taking into account atmospheric and it looks like my actual values dont meet the requested on a lot of occassions. My car is supposedly stock, but there seems to be a peak of 22psi in the actuals Need to add that this was 3rd gear towards redline run

specified | actual
0.0 | 0.1
2.6 | 0.1
9.6 | 2.2
15.2 | 5.1
17.8 | 10.3
18.0 |22.2
18.9 |18.4
18.7 |18.6
18.0| 17.4
0.0 |13.9

 

[hpoolsteve]

Im having the same problem. I have no idea if my are correct or not

http://www.seatcupra.net/forums/showthread.php?t=352280