Your probably making the same rwhp with less rwtq (with all your mods) then the LS1 w/catback. I have seen several LS1 auto fbodies dyno 330-345rwhp with nothing more than intake and exhaust (this is on an auto ). Around here, stock auto Ls1's are trapping 104-105's easy and M6's trap 106-109mph stock. The cobras around here dont seem to put up the numbers people on the internet say they get. Most 99-01 cobras stock trap between 97-102mph. Let say you picked up 3-4mph from your mods, your in the range of stock/lightly modded LS1's.
I know two guys who put down over 330 RWHP in stock Z28s... (free mods). LS1s put down awsome numbers.
thats damn good, especially for the 60ft! just dropping it to a 2.0 60ft would have had you on the threshold of 12's
