I just googled the combine records... check it out:
Most 225 Pound Reps
51 - Justin Ernest, (DT), Eastern Kentucky - 1999
45 - Mike Kudla, (DE), Ohio State - 2006
45 - Leif Larsen, (DT), Texas-El Paso - 2000
44 - Brodrick Bunkley, (DT), Florida State - 2006
43 - Scott Young, (OG), BYU - 2005
42 - Tank Tyler (DT), North Carolina State - 2007
42 - Isaac Sopoaga, (DT), Hawaii - 2004
41 - Terna Nande, (OLB), Miami (OHIO) - 2006
41 - *Igor Olshansky, (DT), Oregon - 2004
40 - Zach Piller, (OT), Florida - 1999
40 - Justin Blalock (OG), Texas - 2007
40 - Manny Ramirez (OG), Texas Tech - 2007
38 - Tony Pashos, (OT), Illinois - 2003
38 - Craig Page, (C), Georgia Tech - 1999
38 - Jeff Smith, (C), Wyoming - 1999
37 - *Wayne Hunter, (OT), Hawaii - 2003
37 - *Haloti Ngata, (DT), Oregon - 2006
37 - Roberto Garza, (C), Texas AM-Kingsville - 2001
37 - Victor Leyva, (OG), Arizona State - 2001
37 - Moran Norris, (FB), Kansas - 2001
36 - Gabe Watson, (DT), Michigan - 2006
36 - *Vince Wilfork, (DT), Miami - 2004
36 - Liam Ezekiel, (ILB), Northeastern - 2005
36 - Scott Peters, (C), Arizona State - 2002
36 - Makoa Freitas, (OG), Arizona - 2003
http://forum.sbrforum.com/nfl-handicapping/72068-nfl-combine-records.html