After a long dyno session last night I decided (after 3.5 hours of sleep) to create a thread to both help me remember settings and experiences; create a collection of things I've found that might help others; and no doubt learn from the diverse experiences of members on this forum.
** Number one problem I've found with dyno tuning is lack of fuel delivery. Go ahead and upgrade that fuel stock fuel pump if you have hopes of moving beyond say 600 rwhp (especially in an automatic). For the dyno operator - make sure you have a fuel pressure gauge handy with some way to record.
For Automatic Cars (got to love the manual transmission cars for simplicity while dyno testing):
1. Transmission >General > Cmd Gear Control Limits: Set the Max RPM to your rev limit and Max Speed higher than what you will reach in 1:1 gear ratio. I had a very repeatable power dip at 5,600 rpm last night in a 2017 Chevy SS. Once I correlated the power dip was at 93 MPH which matched the Max Speed setting in the stock calibration, I simply bumped the value to 130 mph and finally a smooth curve. (Note this car has 3.91 gears)
2. For an unknown car I like to start making pulls in a lower gear for less time at WOT, less MPH, etc. Once the AFR and ignition timing look good make a pull in a 1:1 ratio transmission gear for the hero power/torque numbers.
3. Lock up torque converters using the Scanner for a little more power/torque - but typically only do this for that final hero power/torque graph.
Engine:
1. Engine>Fuel>General>Injector Control>Desoot Mode: DISABLE make this a standard practice to Disable. If you see a lean spike at 2.1 seconds following PE then go back and disable it like you should have done in the first place.
I plan to keep this thread updated with things that I run across, and I welcome all additions that are meaningful for the forum members.