"We're looking a bit further out saying, where do we go from here? We're not throwing the whole car away. Our engine partners are willing to carry the brunt there," he continued. But he admitted that aero kits might still fail to become a reality despite his newly-unveiled technical plan.
"If the team owners disagree with it, there's not a majority there that keeps it going, we'll drop it," he said. "We won't ram it down their throat. We need everybody in the game, we need everybody to bring into this and make it happen." But he added that the IndyCar management itself was still firmly committed to the concept of aero kits and that the idea hadn't gone away simply because Randy Bernard had exited as series CEO at the end of 2012.
"If we didn't feel we need to develop IndyCar in this direction, obviously we don't need to be doing this. The league thinks we do. We've gone to great lengths to explain why we think that's necessary and we're going to move forward with that plan."
Walker said that of more immediate concern to him than aero kits for the rest of this year is tackling the problem of the current car's tendency to lift into the air during accidents. He said that this was the result of the flat bottom of the current chassis and that the series was looking at several ways in which this could be tackled.
"One component of this car is the capability of lift. It has a huge flat bottom. We know it needs that perfect storm to create lift with these cars," explained Walker. "We said we have to address lift. We're going to look at that aspect. Open-wheel cars in general, even NASCAR, all have had to deal with that.
"In the good old days when I started racing, they didn't have flat bottoms like now. It wasn't an issue. You'd probably roll over before you take off. Nowadays the component of downforce and the larger area underneath the car, we have a lift component.
"So we said let's look at it from multiple angles. Do we reduce it, put trap doors in it? We haven't got the answer today," he admitted. "All I can tell you, we, IndyCar, are going to spend a bit of money researching a floor as soon as we can that reduces the lift potential of this car."
Walker admitted that such revisions were likely to see a medium term drop on the speed of the current car but that in the longer term work was underway to enhance speed without compromising driver safety.
"It's our belief that speed does count. Speed is a differential that IndyCar has. They are the fastest cars in the world, in the closed circuit competition, if we want them to be. They have been and they still have some considerable records."
Particularly important to the series is the 100th running of the Indianapolis 500 in 2016, for which the series hopes to see set a new generation of speed records to supersede Arie Luyendyk's existing qualifying benchmark of 236.986mph set all the way back in 1996.