Rev, I have seen some LS1's that ran a bit slower than the average, M6 car's have a higher trap speed than an A4, maybe sedanman's car is a bit stronger than he say's, when you take in weather factors and whether or not he is at sealevel and so forth! I live in Fl, the track I ran at was at sea level, it was around 60 degrees and the humidity was at 69% which is decent but not ideal by any means, I have seen LS1's stock running anywhere from 13.60 @ 103 being a slow one, the fastest bone stock LS1 I ever saw as far a a F-Body goes was a 2000 Z-28 M6 on street tires, bone stock it ran 12.81 @ 110.88 it was perfect weather and he hooked realy good, I have seen stock LS1 vettes run 12.50 @ 112 MPH and a LS6 run 11.90 @ 117 MPH, but these are not the average, just as my friend had a 90 mustang that ran 13.1 with bolt ons, he had a strong car! he even got a 12.90 with an edelbrock intake! with heads, cam, and juice he ran 11.1 @ 116!
