IRWIN Racing’s Mark Winterbottom enjoyed a ‘successful’ hit out at Winton Motor Raceway today as part of a crucial in-season test day.

The IRWIN Racing and DEWALT Racing Commodores completed over 200 laps combined in cool, dry conditions at the regional Victorian circuit prior to the upcoming Winton SuperSprint next week.

After a tough couple of events at Symmons Plains and The Bend, Winterbottom used the test day to try a number of setup items on the IRWIN Commodore.

Over 110 laps were turned between he and his endurance co-driver Michael Caruso as the team looks to roll out competitively at the next Supercars round at the venue.

Caruso completed a strong day behind the wheel as he continues to build up to his appearance with ‘Frosty’ at the Bathurst 1000 in October.

Attention now turns to the next round of the 2021 Repco Supercars Championship at the Winton SuperSprint on May 29-30.

Mark Winterbottom, Driver – #18 IRWIN Racing Holden ZB Commodore

“It was a big day with around 100 laps completed between [Michael] Caruso and I,” said Winterbottom.

“Test days are not glamorous, they’re always the hardest days for our crew all year with big changes thrown at the car between every run and no chance to stop in order to maximise the track time we have.

“It’s a mentally and physically draining day but the car didn’t miss a beat and we got some good feedback from the changes we applied today.

“I thought the car was pretty strong today. We were here earlier in the year for our pre-season test and at the end of that day I hated the car, but I finished up today really happy with where we are at.

“The super soft tyre compound comes into effect when we race here next week, but all-in-all we had a successful day, we go home happy and keep our heads down and prepare for the next round.”

Michael Caruso, Co-Driver – #18 IRWIN Racing Holden ZB Commodore

“It’s been a strong day for the IRWIN Racing car, it ran really smoothly with all the changes we threw at it, we completed over 110 laps so we certainly got our money’s worth from the track hire today,” said Michael Caruso.

“It was good to be here at the test today as these laps are so valuable, we’re not too far away from the big race of the year at the Bathurst 1000.

“These laps really come in handy to familiarise myself with the car and everybody in the team.

“Really looking forward to having another crack in the car at some more ride days and test days soon.”