I have a 2009 G8 GT (L76 6.0) that I have DOD deleted and installed a stock LS3 cam. Essentially this gives me a 6.0 liter LS3, with 3.3% less displacement than a "real" one. I know that the MAF and injectors are the same between a GXP (LS3) and a GT (L76). The throttle body does show a different number. Is it safe or wise to simply copy the timing and fuel-related tables from a stock GXP file to my GT tune to create a baseline tune for my Frankenstein? I believe this would give me a HUGE head start toward finishing the tune, if doing it this way is possible or advisable. BTW, I do not have access to a dyno, so I see this as a way to get similar-to-stock-LS3 performance with proven stock durability. The LS3 stock is about a 50 HP gain over the stock L76. FYI the ECM is an E38.
Anyone out there actually done this before?
Thanks in advance,
Pat