Originally Posted by Cobb Tuning
It's hard to say why a car will knock without seeing logs and other factors like the overall health of the vehicle/sensors etc. For every vehicle that has the kinds of issues you are describing there are many more that don't.
That said, logging is always a good idea, it can tell us how well, or not, a car is running. We use it every day to diagnose issues or even to put fears to rest!
And I do understand this. I know you guys are a quality company. I naively think that since the difference between stage 1 and stage 2 on 09+ wrx's is so small, Tim may have been too aggressive with the timing on stage 2 probably even against his will. After all, you guys are in the business to sell downpipes among other things. This is purely speculation and I would have to talk to him about it and show him the logs I have. In the end... "For every vehicle that has the kinds of issues you are describing there are many more that don't" is absolutely correct and I might just be one of those stray data points.