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Yes it can and does happen. But hen again the LS6 will dump extra fuel in at WOT no matter what. I have found that if you are willing to cut the shroud and install 30# injectors you will make a lot of HP.
Running the Blackwing will not make the engine run rich all the time. I ran it for months alone and my AFR was not too bad. You will not get much of a HP gain ith the BW alone though.
edv I have the blackwing with an after market air bridge and a silicone coupler, Halltek said that combo will give you 380 at the wheels , I have not noted a power loss and the car seems much more responsive and stronger. Gas mileage seems the same?? Mine is a 2002, there are way too many opinions on this most seem good so do not panic too much :crazy:
I am going to have it dynoed, but I took it out today and seems better then yesterday. I Only have about 50 miles on the blackwing, but it felt good today. Wow 380rwhp, I hope mine pulls that! :yesnod: