converter break in?

[silverz28camaro]

i have a 2800 fuddle stall and after install i took it to the track and ran my best of 1.74 60' dead hook and a 12.27 at 111,

I have heard of these converters after some miles will become looser and ther for giving slightly more stall.

Question is is this true? and if so can i expect a little better 60' next year at the track

[performabuilt]

A converter generall will not become looser as that would require a change in fin angles