Hi all,
I hope someone can shed some light on my problem!
I have a 2.0ltr 9000 with T28 3" d/pipe and highflow intercooler, I have recently fitted a Nordic custom ECU rated at 300hp. Since fitting this ECU I have had boost problems, the programme allows for 1.4bar of boost however I am hitting overboost at 1.5bar, sometimes it will only go as high as 1.4 but it will immediatly drop down to 1.0bar.
If I refit my speedparts stage 4 ECU it will now do the same as the Nordic ECU.
I did notice that my base boost was set too high at 0.6bar I have reduced it to 0.4 but still I get the same problems, also the spool up has changed, power would come in at around 2800rpm that has changed to almost 3500rpm I also tried using a manual boost controller this did help the over boost problem but did not reduce the spool up so I reverted back to using the APC valve.
I have today changed the actuator spring as I guessed that it was not able to hold boost, it will now hold boost above 1.0bar. I checked the base boost which is again too high approx. 0.7bar Ok this I can lower to 0.4 again but spool up has become even worse, power does not kick in until after 4300rpm and will hit over boost at just over 5000rpm.
I have spoken to Nordic about this problem and they said they could lower the boost in the programme however I am not sure this is the problem as my speedparts ECU was fine before I changed to the custom one.
Any thoughts!
Steve