1.1.81 boost control

[GintsK]

I can't be agree! Sorry! 
On 100% production cars "method (2)" is not used!
There is no connection to atmosphere:
port 1 - top chamber.
port 2- pressure source
port 3- bottom chamber
that's all!

Common method is this:

[AVP]

actually im sorry, the pictures are mixted up. the method i use now, is the bottom picture. The top picture is the one i am questioning if i should try.

word from turbosmart was that it wont change the characteristics though...

[GintsK]

actually im sorry, the pictures are mixted up. the method i use now, is the bottom picture. The top picture is the one i am questioning if i should try.

word from turbosmart was that it wont change the characteristics though...

I knew that!
With "(2)" your boost problems should been much harder than it is now.

[AVP]

gintis, i am now plotting down 2 excact curves between 1.1.27 and 1.1.81 on my old laptop and trying to see differences.

it seems that on 1.1.27, the car picked up faster even from 3000rpm, it went much faster to 140kpa which is my spring strength and therefore moved much easier to 170-180-200 and therefore all the way to 304kpa on 4057rpm.

the Boost DC on that run was 100% then dropped to 82 on peak boost at 4047rpm and held at 82-83 to give me 304-305kpa for the rest of the run. As mentioned before, the PID setting on that was 240/5/52 and i was using map as ref target, not DC(which was only put to 66 in mid range then up to 70 on higher revs, but im not sure if on 1.1.27 that makes any difference anyway.

so what could be the reason why when the TP is 100% open and the refDC is 100%, the car is not picking up as fast as it was???

[GintsK]

Have you possibility to post both logs?

[AVP]

i will send them to you shortly

[AVP]

you should have the files now

i tried to do the excact identical boost settings from 1.1.27 to 1.1.81 again, copying all refDC and map targets.

obviously, there are no boost offset features here as well as DC ref position so that will need to be seen how it will work.

[GintsK]

You have very advanced ignition in 100KPa and low boost areas on new firmware. It can be that cause far less energy to turbine wheel. Instead of spool turbo energy goes to heat up engine.
Try ignition map from 1.1.27

[billman]

can we also see the logs?

[AVP]

i rechecked today and i saw that the ignition timing map is identical to the 1.1.27 map. on vemstune i have 120kpa and then 170kpa, as the table is smaller and i cannot use the 140 value. Could interpolation be causing this?

i now reconfigured the table and im going to try it out today, but i usually do have high timing up to 120kpa as on cruise on light pedal press to make a small acceleration it seems to work better.

i also decreased the timing on the last runs by far on these areas, even less than 1.1.27 on the 170kpa line, but it didnt make much difference.

[AVP]

billman, you already have logs like that, but i can email them to you again

[GintsK]

Really identical?
Advance seems is the only huge difference between both logs.

Usual 100KPa advance is shifted to 170KPa.

[AVP]

in a few hours, ill send you the msq file i was using  on megatune.

what i can do, is instead of using the 120kpa line on vemstune, change it to 140kpa and keep the 170 as well and try and use interpolation between 100-140 or something. but im pretty sure it is identical. on megatune i had 100-120-140-170 lines and what i did on vemstune was to use 100-120-170 and keep the 170 line the same in both firmwares.

[AVP]

on the megatune file, you need to be aware, that as the boost is coming in much faster, its hitting areas of kpa much sooner and therefore the spark on that area is indeed less, but if it didnt, then it would be higher.

on vemstune, as it is not hitting those areas fast enough, it seems that it has higher timing

[GintsK]

Can be.

Bad thing about these both logs: 1.1.27 is not WOT at all and 1.1.81 is WOT only from 3xxx Rpm