my procharged hemi we use timming , i have a FAST ecu and a digital 7 ing box but its all done though the FAST , even when my air charge temps go up it takes out timming to compensate for the heat. its a big learning curve hope to get some better passes next year its been 160mph in the 1/4 on street tires and a base tune at 3960 lbs

606 hemi pump gas best 9.60 at 142mph on motor
05 hemi daytona 1500 go-mango 4wd quadcab
2007 hotrod mag pump gas drags runner up, roadkill nights dodge big tire winner 2018 2019 back to back