I'm just scanning but not tuning right now.
It's a '19 ZR1 auto.
I've been trying to learn how much octane booster or 100-oct racing gas to mix with 91-oct pump gas to keep the LT5 out of KR.
I get some strange scan data.
In fourth gear runs uphill from 1500RPM to the rev limiter, I see a fairly significant KR "hit" but, in the spark reading, I don't see the same about of spark pulled. This problem is consistent.
For example, on one run, I had a KR spike to 4.9? at 6270RPM which stepped down to 4? at the 6600RPM rev limiter then to zero yet, the spark stayed almost the same the whole time between 19.0? and 19.8?
Seems to me with 4-4.9? KR it should have been at 14.9?-15? during that KR incident.
Any ideas?