after a tuning session that i had on a dyno to check my timing and knock(all was ok) i couldnt get the boost to not oscilate on spool on the runs. After not wanting to spend too much time on the dyno, i decided to fix it on the road. However i was unsuccesful, until i realised that my newly rebuilt wastegate was sticking open as the valve was scoring on the guide!
A secondhand wastegate later, and i was back in business.
On the dyno with the oscillations and 1.68bar on the redline it made 368.7whp (dyno dynamics)
on my virtual dyno excel sheet i managed about 374whp on 1.87overboost and 1.68 at the redline.
here is a dyno chart (comparison) vs an RS2 with K27/26 tuned to 2.2bar overboost and gradual reduction on a newly rebuilt engine and ported head.
I must say i am not impressed with the way vems logs the rpm. On 2 out of 3 runs during the mid range 4800-5300rpm the rpms almost flattened out, when the boost was 300kpa! I am not sure if that was happening because the VE table had 300kpa as the top bin, and for some reason there was a problem of the log.
Then on the final run, which was a slight downhill, the rpm log was ok, and virtual dyno measured 429whp, which i cannot take as true!
for anyone wanting to see a log with the flatspot on the revrange i can email the log if you give me the email address.(uploading the log on a server is much to time consuming).
I have now dealt with the PID settings on the boost and left it to 1.9bar overboost and 1.8 till 6000rpm and 1.7bar at 6500 tailing off at 7300.
Car has a beautifull midrange and it gives almost around 470-480hp crank which is brilliant!