GP3 rookie Alex Lynn and his Carlin team dominated the second and final day of GP3 testing at Estoril on Friday.
The Briton, joining the series after finishing third in the Formula 3 European Championship, topped both the morning and the afternoon sessions from team-mate Emil Bernstorff.
Lynn's best time of 1m28.553s, set in the afternoon, was the benchmark, as both him and Bernstorff were the only drivers to break into the 1m28s barrier.
Jimmy Eriksson was the first non-Carlin driver in third for Koiranen, while Roman de Beer put the Trident car fourth in the timesheets. Another Carlin driver, Luis Sa Silva, completed the top five.
The session started on a wet track following the overnight rain, but drivers were able to switch to Pirelli's medium tyres at the midway point.
A total of five red flags interrupted the action, the first caused by Robert Visoiu in the morning when he spun and stopped on track.
Yesterday's pacesetter Dino Zamparelli stopped on the circuit twice during the day, while Santiago Urrutia and Melville McKee caused the other two stoppages.
Spaniard Roberto Merhi was the only new face in the test today, joining Status in place of Richie Stanaway.
The next GP3 test will take place at Jerez on 10-11 April.
Morning times Pos Driver Team Time Laps 1. Alex Lynn Carlin 1m29.266s 25 2. Emil Bernstorff Carlin 1m29.489s 34 3. Dino Zamparelli ART 1m29.583s 31 4. Melville McKee Jenzer 1m29.609s 27 5. Nick Yelloly Status 1m29.682s 32 6. Marvin Kirchhofer ART 1m29.700s 47 7. Jimmy Eriksson Koiranen GP 1m29.816s 22 8. Alex Fontana ART 1m29.898s 28 9. Robert Visoiu Arden 1m29.929s 34 10. Roman De Beer Trident 1m30.138s 30 11. Jann Mardenborough Arden 1m30.292s 30 12. Patric Niederhauser Arden 1m30.302s 31 13. Luis Sa Silva Carlin 1m30.372s 25 14. Nelson Mason Trident 1m30.445s 32 15. Roberto Merhi Status 1m30.480s 41 16. Dean Stoneman Manor 1m30.505s 29 17. Pal Varhaug Jenzer 1m30.752s 18 18. Santiago Urrutia Koiranen GP 1m31.125s 18 19. Patrick Kujala Manor 1m31.325s 30 20. Ryan Cullen Manor 1m31.392s 38 21. Adderly Fong Jenzer 1m31.799s 19 22. Victor Carbone Trident 1m31.981s 37 23. Alfonso Celis Jr Status 1m32.377s 29 24. Carmen Jorda Koiranen GP 1m35.576s 32 Afternoon times Pos Driver Team Time Laps 1. Alex Lynn Carlin 1m28.553s 31 2. Emil Bernstorff Carlin 1m28.774s 43 3. Jimmy Eriksson Koiranen GP 1m29.259s 28 4. Roman De Beer Trident 1m29.276s 28 5. Luis Sa Silva Carlin 1m29.331s 18 6. Dean Stoneman Manor 1m29.333s 28 7. Alex Fontana ART 1m29.442s 23 8. Dino Zamparelli ART 1m29.468s 11 9. Nick Yelloly Status 1m29.538s 33 10. Marvin Kirchhofer ART 1m29.553s 11 11. Patric Niederhauser Arden 1m29.744s 16 12. Patrick Kujala Manor 1m29.838s 23 13. Victor Carbone Trident 1m29.921s 28 14. Nelson Mason Trident 1m29.935s 29 15. Melville McKee Jenzer 1m29.961s 18 16. Roberto Merhi Status 1m30.010s 22 17. Santiago Urrutia Koiranen GP 1m30.041s 20 18. Robert Visoiu Arden 1m30.066s 24 19. Pal Varhaug Jenzer 1m30.162s 32 20. Alfonso Celis Jr Status 1m30.199s 27 21. Jann Mardenborough Arden 1m30.235s 38 22. Adderly Fong Jenzer 1m30.237s 23 23. Ryan Cullen Manor 1m30.327s 24 24. Carmen Jorda Koiranen GP 1m30.599s 20