Claygate's Sam Bird headed the time sheets on the second day of official testing at Snetterton, Norfolk, on Tuesday.
In a field of 25 drivers, the 20-year-old posted a best time of 1.02.298 in a late run in the afternoon.
"We had been testing different aspects of the set up all day Monday and yesterday morning" said Bird, "and it proved to be very productive."
"I'm very happy with the way testing has gone so far and I'm continuing to learn with every day on track.
"Carlin is a great team to work with and I'm relishing the challenge ahead."
Testing continues throughout March with the first race at Oulton Park on Easter Monday.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereComments are closed on this article