Houston: Practice 2 times

Pos Car Class CPos Drivers                                Team                     Car                            Time      Gap   to 1st
--- --- ----- ---- -------------------------------------- ------------------------ ------------------------- --------- -------- --------
 1.  26 P2    1    B.Herta, M.Franchitti                  Andretti Green Racing    Acura ARX-01a              1:02.102
 2.   1 P1    1    R.Capello, A.McNish                    Audi Sport North America Audi R10 TDI               1:02.408    0.306    0.306
 3.   9 P2    2    D.Brabham, S.Johansson, D.Dayton       Highcroft Racing Acura   Acura ARX-01a              1:02.414    0.006    0.312
 4.   6 P2    3    S.Maassen, R.Briscoe                   Penske Racing            Porsche RS Spyder          1:02.472    0.058    0.370
 5.   2 P1    2    E.Pirro, M.Werner                      Audi Sport North America Audi R10 TDI               1:02.853    0.381    0.751
 6.   7 P2    4    R.Dumas, T.Bernhard                    Penske Racing            Porsche RS Spyder          1:03.117    0.264    1.015
 7.  20 P2    5    C.Dyson, G.Smith                       Dyson Racing             Porsche RS Spyder          1:03.207    0.090    1.105
 8.  15 P2    6    A.Fernandez, L.Diaz                    Fernandez Racing         Acura Lola BO6             1:03.354    0.147    1.252
 9.  16 P2    7    B.Leitzinger, A.Wallace                Dyson Racing             Porsche RS Spyder          1:03.589    0.235    1.487
10.   8 P2    8    J.Bach, B.Devlin                       B-K Motorsports          Mazda Lola B07-40          1:05.566    1.977    3.464
11.  37 P1    3    J.Field, D.Dayton, R.Berry             Intersport Racing        Creation CA06H Judd        1:06.553    0.987    4.451
12.   4 GT1   1    O.Gavin, O.Beretta                     Corvette Racing          Corvette C6-R              1:07.385    0.832    5.283
13.   3 GT1   2    J.O'Connell, J.Magnussen               Corvette Racing          Corvette C6-R              1:07.718    0.333    5.616
14.  31 GT2   1    D.Mueller, J.Janis                     Petersen/White Lighting  Ferrari 430GT              1:10.035    2.317    7.933
15.  45 GT2   2    J.Van Overbeek, J.Bergmeister          Flying Lizard Motorsport Porsche 911 GT3 RSR        1:10.374    0.339    8.272
16.  62 GT2   3    M.Salo, J.Melo                         Risi Competizione        Ferrari 430GT              1:10.377    0.003    8.275
17.  44 GT2   4    S.Neiman, D.Law                        Flying Lizard Motorsport Porsche 911 GT3 RSR        1:10.529    0.152    8.427
18.  73 GT2   5    J.Tafel, D.Farnbacher                  Tafel Racing             Porsche 911 GT3 RSR        1:10.795    0.266    8.693
19.  71 GT2   6    W.Henzler, R.Liddell                   Tafel Racing             Porsche 911 GT3 RSR        1:10.996    0.201    8.894
20.  61 GT2   7    N.Jonsson, T.Krohn                     Risi Competizione        Ferrari 430GT              1:11.769    0.773    9.667
21.  18 GT2   8    R.Kelleners, T.Milner                  Rahal Letterman Racing   Porsche 911 GT3 RSR        1:12.224    0.455   10.122
22.  21 GT2   9    B.Auberlen, J.Hand                     Panoz Team PTG           Panoz Esperante            1:12.265    0.041   10.163
23.  54 GT2   10   T.Pappas, T.Borcheller                 Team Trans Sport Racing  Porsche 911 GT3 RSR        1:12.407    0.142   10.305
24.  22 GT2   11   S.Maxwell, R.Smith, B.Sellers          Panoz Team PTG           Panoz Esperante            1:13.480    1.073   11.378