Rain washes out Milwaukee test

Sam Hornish Jr had the fastest combined practice speed at 164.868mph in the Team Penske Dallara/Toyota. Team-mate Helio Castroneves was second quickest at 164.582 mph, and Scott Sharp was third at 163.707mph in the Delphi Dallara/Toyota.

"Being able to come and run here for a day has certainly been beneficial, but we would have liked to run today and work a bit more on the race set-up," said Team Penske president Tim Cindric.

Reigning IndyCar Series champ Scott Dixon said the one day's testing was good enough to develop a base set-up.

"I think we're not too bad," said Dixon, who was fourth quick on the chart at 163.332 mph in the Target Chip Ganassi Racing G Force/Toyota. "We're only a tenth and a half (of a second) off of the top time, and I think we found enough (speed). It will be a pinch having to find it when we come back, but we're all right."

The IndyCar Series returns to Milwaukee for the ninth round of the series on July 25, it will be the first time IRL has raced at the historic circuit.