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Just dropped a forged rod and piston LS3 into my 2009 4wd Avalanche 6l80. Had to dyno it in 3rd due to MPH on the dyno.
engine specs 2012 LS3 11:1 Summit Pistons and Gas Ported Rings K1 Rods TSP L92 stage 1 cam 218/228 Summit LS3 Rockers 1-7/8” Long Tube headers
Dynojet Dyno
Truck has 377 hp/tq with a nice torque cure and the HP peaks at 5500 and only lost 7hp at 6500.
Is there a why to see what the numbers would be in 4th gear? I feel like this should be a 400hp combo and 4th would show that. I’m happy with how it drives and was expecting 380whp so it’s pretty on the money.
Looks on par to me. My wife's 2011 Camaro SS with a hot cam made 418 if my memory is right. That's thru a 2wd 6l80 with probably smaller wheels and tires than your truck. It's a Howard's hot cam so similar cam specs.
I’m thinking the 130psi oil above 5k might of killed a few hp. Texas speed said the cam should pull to 6200. He ran it out to 6800 and it never dropped power.
Forged LS3 Dyno 
