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It's like anything else. Your engine is mapped for a stock configuration, air flow, back pressure etc. So when you change one of those parameters the PCM compensates by adding or subtracting fuel while in closed loop. This is all well and good until you go to WOT or open loop. Now you will have slightly more fuel added to what's already commanded by the PCM. It's not really a big deal but not optimum either. The worse case is you run slightly rich.
Once tuning software comes out for the LS7, you can get it tuned and all will be right with the world once again.
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He's a freak of nature having only one eye. Oh, and one other thing, sig by the Hillbilly!
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