We present a search for a massive quark (t) decaying to Wq and thus mimicking the top quark decay signature in data collected by the CDF II detector corresponding to 2.8 fb^-1. We use the reconstructed mass of the t quark and the scalar sum of the tr
ansverse energies in the event to discriminate possible new physics from Standard Model processes, and set limits on a standard 4th generation t quark.
This proceedings describes the XFT stereo upgrade for the CDF Level 2 trigger system. Starting with the stereo finder boards, up to the XFT stereo track algorithim implementation in the Level 2 PC. This proceedings will discuss the effectiveness of t
he Level 2 Stereo track algorithm at achieving reduced trigger rates with high efficiencies during high luminosity running.
