Paul Tracy has accused Champ Car officials of fixing the race at Surfers Paradise this weekend and costing him a victory.
The Forsythe driver was forced to let two drivers pass him in the closing stages of the race, and accused officials of trying to get Alex Tagliani's Team Australia car onto the podium down under.
Tracy was given a penalty for passing Mario Dominguez under yellow flags and had to give back the position, then had to give up another place after a failed passing attempt on the Mexican resulted in him cutting a chicane without gaining a place.
"I'm so pissed off with Champ Car and its officiating," said Tracy. "I feel that the second penalty was just a fix to get one of the Team Australia cars on the podium. It's so clear it's ridiculous.
"With Mario I was avoiding both of us crashing, and I have to drop back because of it. Basically, you are damned if you do and damned if you don't - if you make contact they will penalise you for that also."
Tracy had lost ground early in the race after he tangled with Will Power and cut a tyre, but a change of pit strategy had him back at the front in the closing stages.
"I can't even describe how upset I am," he said. "This was our race to win, the strategy worked beautifully and then they took it from us."