maxgee

iTrader: (5)

What's the best way to go about setting this up in hptuners for drag racing?
1. Can I build boost on the line retarding the timing?
2. What range of rpm should I retard the timing; I assume in the range I'm launching from?

darkhorizon

Not really.

I made a switch that defaulted the IAT sensor to -30c, and it pulled 49 degrees of timing. This gets you to 0 degrees advance.. but it wont ever get you to 0BTDC timing.

Might be different in some of the LS2 pcms, but most you cant command less than 0 degrees advance.

Frost

iTrader: (45)

There is a Max Spark retard limit table that can be set as low as -25 in HPTuners (for GenIII V8 anyways). I know for certain that this table is the keeper of the 'floor' for spark.

darkhorizon

I can command less than 0 degrees, but it will never actually go less than zero in the 2cyl per coil waste spark systems I work with?