Scuderia Toro Rosso's technical director Giorgio Ascanelli has ruled out introducing an F-Duct system in the near future.
The Italian said his team would rather focus its resources on other areas that will help the Faenza-based squad improve its performance even more.
"That's because if I have 10 euros in my pocket and I'm hungry, I buy two sandwiches with it instead of three grams of caviar," Ascanelli told Autosprint magazine.
"Maybe we'd be able to find some advantages after five months of development, but in that same time span we can improve even more by developing other parts of the car.
"That kind of system is no good for those who, like us, began to get the wind tunnel to work properly only in November."
Ascanelli also said that early indications suggest the system only works well in clean air, but does not help much when it comes to overtaking.
"I dare not comment on that. But judging from what we have seen in these early races, it looks to be that way," he said.