Quote:
Originally Posted by scalbert
FYI, I downloaded the 2.0.2 map (to reload the default values) and went for a drive. Everything was fine and it responded as it should with a single exception. One time when in 3rd at 3k revs, I floored it and hit 18 PSI and then it quickly dropped to 13 PSI and slowly ramped up from there; as it should.
When I floored it just below 2500 RPM, it went to 13 PSI without a spike.
I floored it at 4000 RPM in 3rd and no spike
I even gave it about 50% throttle at 2500 revs, which brought the boost up to about 10 PSI, and then floored it and it went to about 13 - 14 PSI without a spike.
So, the issue would not be seen in the majority fo the cases. You really have to look for it.
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Well, I just got back from some more testing
. I couldn't get a laptop sorted in time so no data logs, but I'm going to validate Scalbert's results...
With default 2.0.1 settings:
WOT@2200rpm - no spike
WOT@4000rpm - no spike
I hit a 17+ psi spike must of the time when suddenly going WOT between those two ranges (2800rpm seemed like the magic number). Usually this was in 3rd but I got it to happen in 4th too.
Also, I saw some oscillation up to 15.2 psi above 6000rpm whilst in 3rd (didn't have much time to observe this though!)
Reduced the torque settings by 5% (i.e. 95% to 2000rpm, then down to 85% @3000-4000, then back to 95%@6000):
WOT@3000rpm - max boost I could provoke was 16.4 and it was down in the high rpm band too.
The spike is definitely still there with the reduced settings but not so large.
I'm going to keep these 5% reduced settings alone for now.
Scalbert, do you have any data logs you can share?