Preliminary testbeam results for the CDF Tile-Fiber End Plug
Upgrade Hadron Calorimeter (HCal) are presented.  Data were taken at incident
momentum range of 5 to 230 GeV/c during 1996-7.  The discussion of the pi-p
energy response difference is motivated by the proton contamination in the
hadron beam.  Three effects which result in the pi-p response difference are
studied.  Measurements of the pi-p energy response were done at 5.4 and 13.3
GeV/c.  The data agree with a calculation based on the three effects.  The
calculated proton contamination correction is applied to all the hadron data.
The linearity and resolution of Hcal to pions are presented.  The e/h
parameter is extracted from the measurements of the response of Hcal to pions
and positrons.