1991 TransAm GTA 5.7L, SLP cat-back, and custom tune with a narrowband O2 sensor = 14.4 @ 97mph with a 2.4 60'

3.8TransAmon thirdgen.org just ran off the 14.4 in 90* heat with on a very humid day, with no track prep whatsoever. We're pretty sure that on a good day she'd knock down a high 13 pass.

 

Low-mid 14's if you know what you're doing.

 

Listen to your dad, he knows what he is talking about. And get a new mechanic because he is an idiot and has no clue what he is talking about.