I recently acquired a P2K GP9 with factory QSI sound, 2008 run. It runs slow next to my fleet of P2K engines with TCS T1 Back-EMF decoders. I do have Decoder Pro available.
Where should I start to get the QSI to run with the TCS engines?
Decoder Pro looks to have PID adjustment for the Back-EMF in the QSI chip.
Mike WSOR engineer | HO scale since 1988 | Visit our club www.WCGandyDancers.com
Get the engine just underway with CV2.
Then speed match it to the same throttle setting as your fastest engine when doing what you feel is its maximum scale speed by adjusting CV5 (V-Max). CV5 may be the highest voltage setting number possible for the QSI, or it may be considerably less. If the range is 0-255, start with 200 and adjust in lots of 30 up or down until you are close, then go to lots of 10.
-Crandell
I think I found the main problem. The new engine has the 14:1 gearing, and most of everything else has the Athearn-style 12:1 gearing. The QSI says (F10) it tops out at 71 smph. I think the older P2Ks go faster.