Prodrive Racing Australia team principal Tim Edwards says the squad’s 2017 Virgin Australia Supercars Championship was “OK” rather than great.
The Ford outfit - which becomes Tickford Racing in 2018 - won four races and finished with three drivers between fifth and eighth in the standings led by Chaz Mostert, who with Steve Owen claimed its first PIRTEK Enduro Cup.
While Mostert also remained in mathematic title contention until the season finale in Newcastle, Prodrive often played second fiddle to the fight between Shell V-Power Racing and the Red Bull Holden Racing Team.
"It was an OK year, certainly wasn't a great year by our own standards," Edwards told Supercars.com.
"I'm pleased that we made some good inroads into the top two [teams] in the back half of the year.
"That bodes well for 2018. But it was an OK year.
"You never describe a year that you obviously haven’t won a Bathurst or you haven’t won a championship as a great year."
Winterbottom finished one spot behind Mostert in his first season with engineer Brendan Hogan, but endured his first winless campaign with the team he joined as Ford Performance Racing in 2006.
"[For] Frosty, the year certainly didn't start well," Edwards said.
"He had some mechanical issues with his car that sort of put him and his engineer on the back foot from the start of the year and then that almost puts you in a bit of catch-up phase.
"So that certainly impacted their championship for a bit.
"We also had some work to do on the car, it’s not all about the drivers. We didn’t give the drivers the best car that we could for the first part of the year.
"And that was not from lack of trying, you’re always endeavouring to find new things and new ways of doing it and we saw us come out of Darwin and we’d thrown the kitchen sink at it to try and find some pace and we got that wrong.
"So you’re always trying. But certainly the improvements we've made to the car really in the back half of the year, they were just an extension of the learnings that we that we got in the first part of the year."