My previous comment holds true though. I think you could get a New Edge GT into the 12s without full suspension, but suspension upgrades certainly help!!!
+1, you'd need a lot of power to get a new edge GT into the 12's w/o suspension. 98COBRA281 is a great example for how effective suspension mods are. He has a UPR k-member, upper and lower control arms, FLSFC's, and has run into the 11's w/ a N/A NPI headed 2V car.
Now it isn't easy obtaining the kind of 1/4 mile times he has, but considering he has done this N/A with only 330 RWHP is very impressive IMO. In fact, there are many with well over 400 RWHP that can't break into the 11's. Suspension set-up is definitely just as important as the engine/drivetrain.