car: 1998 camaro z28
mods: ported tb, cutout, tsp lid
times: 13.48@104 2.0 60 ft

problem: just intalled 3400 stall
times: 13.3@100 1.8 60 ft
times: 13.4@100 1.7 60 ft

with my old times and a stall i was hoping for a 12.9-13.0, especially with those 60 fts.

seems as my car dies around the 1/8?

8.5@80 in the 1/8 mile.

my friend who installed my stall, told me i had "slack" in my drivetrain. could that be the problem? if so...what or how can i fix this problem?

 

1/8 - 1/4 8.601 85.25 / 13.174 108
1/8 - 1/4 8.578 85.04 / 13.157 107.77
1/8 - 1/4 8.559 85.32 / 13.135 107.46

Looks to me like you are missing on the top end.. usually exhaust blockage causes that.. but seeing as how your top end completely fell off compared to your original times, perhaps your tranny is slipping?
I would post this in the Drivetrain section.