Quote Originally Posted by Fast355 View Post
Leave the altitude bias alone. Not sure why people just program this out with no knowledge of what it is actually there for or what they are doing by removing it. The weird datalog SA is because the logging aoftware is not recognizing a negative number. Zero'ing the bias is adding that much timing to the whole timing map. If it was a bias of 9.81 and you set it to zero, you have added nearly 10° across the entire spark map.
How can you accurately say "with no knowledge"?

I can accurately state, you don't know everything!

dave w