FORT WORTH, Texas -- Verizon IndyCar Series teams are taking various approaches in their attempt to find efficient downforce with their Chevrolet and Honda superspeedway aerodynamic platforms on the 1.455-mile, high-banked Texas Motor Speedway oval in preparation for the Firestone 600 on June 6 (8 p.m. ET on NBCSN).

Experimentation during the late-morning practice included an asymmetrical rear wheel guard winglet (right side on No. 3 Chevrolet of Helio Castroneves and left side on No. 2 Chevrolet of Team Penske teammate Juan Pablo Montoya), two winglets on right side of No. 14 Honda of Takuma Sato and one of other side, and road course tire ramp flicks and underwing diffusers.

"Wirth Engineering comes to us with their suggested kit and then it's really up to the teams," said Graham Rahal, driver of the No. 15 Rahal Letterman Lanigan Racing Honda. "You saw to start the session the Andrettis had the speedway wickers.  We had the road course winglets on the back. (James) Jakes had none. That's a huge change in downforce and drag levels obviously between those three options.

"What we've been pretty strong at I think this year on the engineering side is keeping it relatively simple. Our guys looked at it and said, 'Well, we think this is best.'  From here we're going to try this. If that works, then great. If it doesn't, then we'll just qualify conservatively and just focus on the race."

A sampling: