switched to a 2800stall is it slipping

[Blkt6]

went from the stock converter to a 12"2800 stall.from a dead stop it slips a little compared to the stock.Is this because of the higher stall?

 

[Berman]

Yes.

 

[Two Lane]

What brand did you purchase? How much faster does your car feel ? Is your converter a lock-up or non-lock-up? Any track times yet?