Jack Roush signs autographs at MIS. Dave Marr photo

Jack Roush has an plan.
But he's not sure he wants NASCAR to follow it.
The owner of Roush Fenway Racing wants the stock-car sanctioning body to inspect and send to a wind tunnel two cars from each manufacturer following each Sprint Cup race.
That way, Roush believes, everyone will know whether Ford, Chevrolet or Toyota has an advantage over the others in important areas like downforce.
"They don't want to introduce a reason why one manufacturer has an advantage," Roush, whose company owns three Ford-backed Sprint Cup teams, said Sunday, explaining why he doesn't think NASCAR will take up his idea.
Competition in Sprint Cup racing is close, Roush said, noting that all three manufacturers placed a car in the front two rows for the start of the Pure Michigan 400 at Michigan International Speedway.
"I think NASCAR is happy with that," Roush said.
What makes Roush nervous about NASCAR checking out two cars from each manufacturer after each race?
"My fear is that they might do the test and find that Ford is not at a disadvantage," Roush said.