RPM's drop too low... torque converter?

[mowrey96@yahoo.com]

I have a Vigilante 3600 Torque Converter (thanx TBYRNE!). I had it installed and the car was dyno-tuned. I haven’t had time to bring it back to have it tweaked, but I will. I am trying to self-diagnose the problem. When I punch the throttle and let off quickly, the rpm’s drop to between 200-600 rpm’s. Occasionally it stalls. This sucks in traffic. Could this be related to the torque converter? In a manual transmission, the flywheels inertia keeps the engine from stalling. What keeps an automatic from stalling (nothing, in my case)? I guess it may just need to be tweaked on the dyno, but I thought I would throw it out there to see if anyone has any ideas.

Mod’s:
99 Coupe
Automatic
Vigilante 3600
Head and Cam package
Vararam
Ported TB
78mm Fast Intake
Long Tube Headers
GHL Exhaust

 

[c4c5specialist]

HI there,
Your inertia theory is exactly correct. When you take a smaller torque converter and install it, you change the rotational inertia.
This is what is causing your stalling condition. I am sure that you can tune it out.
Allthebest, c4c5