The EFI tunes are definitely the way to go. The stack can perform but certainly not as well as the EFI.
Give JK a call, his LB7 tune runs really well and is being improved. His LLY tune is great, I love running it for a daily driver.
2002 LB7 D/A 2WD. Suncoast Stage V. KD EFILive Tuned, KD N2O, KD 40 Over Injectors, MDP Custom Fuel System, KD MEGA Filter, BD Turbo
2005 LLY D/A 2WD. KD Headlight Booster, KD 4/5 Exhaust, Suncoast Stage V, KD EFILive Tuned.
LB7:12.8@108 #2 Only 11.92@115.62 #2W/N20
LLY: 471HP & 990 TQ 13.58@100.57
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