Will Power, PenskeWill Power topped a fast morning session of Tuesday's IndyCar open test at Barber Motorsports Park.

On a morning where 18 drivers went under the official Barber lap record of 1m09.8529s, also set by Power, the Penske driver topped the charts with a best lap of 1m08.4984s. Andretti Autosport's James Hinchcliffe edged out teammate Ryan Hunter-Reay by 0.2 second to go second fastest, with Helio Castroneves just behind them.

Scott Dixon was quickest of the Honda-powered drivers in fifth, just ahead of fellow Ganassi driver Dario Franchitti and Rahal Letterman Lanigan's Mike Conway.

KV duo Tony Kanaan and Simona de Silvestro were next, with BHA's Alex Tagliani rounding out the top 10.

Track manager Mark Whitt told IndyCar.com recent diamond grinding of the track surface contributed to the fast times.

“It runs like a diamond-bladed polisher horizontal with the surface of the racetrack and takes the aggregate back down to the base," Whitt said. "We've been running 10 years so the aggregate gets exposed so we ground the aggregate to get it back down to the base, which makes a smoother surface but more grippy surface.”

The process is expected to prolong the life of the course, which is in use more than 220 days a year. Porsche driving school events and motorcycle and car club weekends followed the project before the IZOD IndyCar Series test.

The morning session was delayed 45 minutes because of a track temp below 50 degrees.

"I'm surprised they're doing it so fast," Whitt said, noting that rain all day March 11 washed away track rubber. "I'm waiting to see what they do when they get rubber on it."

Morning times:

1    Will Power, Chevy               1:08.4984    120.879 
2    James Hinchcliffe, Chevy    1:08.5729    120.747    0.0745   
3    Ryan Hunter-Reay, Chevy   1:08.7023    120.520    0.2039 
4    Helio Castroneves,  Chevy  1:08.7702    120.401    0.2718 
5    Scott Dixon, Honda              1:08.9443    120.097    0.4459  
6    Dario Franchitti,  Honda       1:09.0381    119.934    0.5397  
7    Mike Conway, Honda           1:09.0746    119.870    0.5762    
8    Tony Kanaan, Chevy            1:09.1754    119.696    0.6770  
9    Simona De Silvestro, Chevy 1:09.3779    119.346    0.8795 
10   Alex Tagliani, Honda            1:09.3810    119.341    0.8826
11   Marco Andretti, Chevy          1:09.3822    119.339    0.8838
12   EJ Viso, Chevy                     1:09.4549    119.214    0.9565 
13   Justin Wilson, Honda            1:09.4960    119.144    0.9976   
14    Graham  Rahal, Honda        1:09.5559    119.041    1.0575 
15    Charlie Kimball, Honda        1:09.6635    118.857    1.1651
16    Oriol Servia, Chevy              1:09.6774    118.833    1.1790
17    Josef Newgarden,  Honda    1:09.7673    118.680    1.2689   
18    Tristan Vautier, Honda          1:09.8132    118.602    1.3148   
19    AJ Allmendinger, Chevy       1:09.9567    118.359    1.4583 
20    Simon Pagenaud, Honda     1:10.8606    116.849    2.3622   
21    Ed Carpenter, Chevy            1:11.5741    115.684    3.0757 
22    Ana Beatriz, Honda              1:17.2520    107.182    8.7536  
23    JR Hildebrand, Chevy           1:19.6445    103.962    11.1461  
24    Sebastien Bourdais, Chevy   1:31.9743    90.025    23.4759