Read Autocar's review of the Subaru Levorg
Those extra days will be vital for Subaru. While drivers Jason Plato and Colin Turkington both managed to score points during the opening three races of the campaign on 3 April with a 12th and a 13th place finish, there is still an awful lot of work to be done to get them to the very front of the field.
The team will take its time before using any of its test days. Firstly, it will take a while to assess the data. Because the car was so new (it had only taken part in a 15-minute shakedown at Brands Hatch on the Friday before the event), each of the team’s four drivers – including team principal Warren Scott and James Cole – ran differing set-ups across each session and in the three races.
So that's as many as 24 sets of data to compare. And then, once that has been established, there is the time needed to create any new parts for the car that it might deem necessary and test them. Donington takes place on 16-17 April, leaving very little for time for anything meaningful to happen.
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This was only the car’s first outing and the engine is not yet at full power, as was clear from the speed trap times. The rear-wheel-drive Levorg was almost 5mph slower across the start-finish line at Brands than the rest.
Basing any fundamental changes on a car that isn’t yet fully up to speed power-wise would be foolish. So gaining more data from the next three meetings is probably more crucial than trying to rush through quick fixes that might not work in the longer term.
But there was something more important than any of that. What the team needed most, after Brands Hatch, was rest. Building up four cars in 87 days is unprecedented and there aren’t many squads that could have done that.
The team will be refreshed at Donington Park next weekend, they will have a bank of knowledge from the data and they will be more familiar with the new beast that they are working on.
The first steps might seem like small ones, but they are vitally important as the three-year programme comes to life.