Dyno'd 2) LS7's today.

[jeff s]

On the engine dyno. Both engines were within 3 HP of each other. Tried a number of different things. Best results were with Cats and Air filter in place.
566.6 Hp and 521 lb ft engine #1
563.8 and 516.8 lb ft engine #2
We use an 06 ZO6 ecu with drive by wire pedal assembly. Still maintains std GM cold start mapping, AC anticipate signals and full sequential injection unlike some others out there. Idle smooth at 650-700 rpm.
445 lb ft at 2750 rpm.
What an incredible engine GM has given us.