Gemma Mac sold for $41,000 as yearing last year. Photo: Supplied.

Juvenile filly Gemma Mac showed she was on track for her big race assignments when breaking the Wyndham track record on Sunday.

The Cran Dalgety trained pacer set a new mark for two-year-old fillies when pacing a 1.55.4 mile (1609m) to beat her own age and sex.

Gemma Mac was having just her second start after running second on debut behind Major Sass at the same track on Thursday.

The Paul Court trained 3yr-old also won yesterday to remain unbeaten in two starts.

Gemma Mac took 1.4sec off the previous two-year-old fillies’ mile record set in 2013 by Bootie Bromac.

Dalgety sent the pacer south with the hope her trip would help prepare her to compete in upcoming fillies features.

Judging by her excellent win, it looks to have worked already.

“I wasn’t expecting her to go that fast, but obviously we are wrapped with her effort to do that.”

“With the two meetings on the Thursday and the Sunday it was a good chance for her to get some experience against her own sex, so it worked out really well.”

Gemma Mac is one of three fillies Dalgety has stepped out so far this season.

Woman In Gold finished second in front of stablemate, Dr Susan, in Pearl Harbour’s Young Guns Fillies heat win at Alexandra Park last month.

Dalgety said there was little between his trio on ability

“The three of them are very similar.”

“We will keep driving on and try to get to the stakes races that are coming up.”

Gemma Mac was given no favours in her track record breaking run.

She was forced out of a battle for the front after a hot early speed.

Driver Tim Williams then worked the filly from last to outside the leader, Total Diva, at the 1000m.

Gemma Mac did not let that tough trip stop her from scoring an impressive two-length victory.

The Art Major filly was not the only promising youngster Williams drove to victory over the weekend.

He scored with two-year-old gelding, Copperfield, who overcame an early gallop for an impressive win at Addington on Friday night.

Williams drove Enhance Your Calm to win the Orari Challenge Stakes in his first start as a three-year-old on Saturday.

Dalgety was unable to attend Sunday’s Wyndham meeting as he was at the Australian Pacing Gold yearling sale in Melbourne.

He purchased a colt and filly by Bettor’s Delight.

Gemma Mac was offered by Winton breeders Todd and Fleur Anderson at last year’s Christchurch yearling sale.

Dalgety secured the filly for a large group of owners for $41,000.

The Andersons will offer a full brother to Gemma Mac at this year’s sale.

Dalgety’s star pacer, Pat’s Delight, has moved in to quarantine ahead of his return to New Zealand.

The four-year-old disappointed in last month’s Four-Year-Old Bonanza at Melton, won by Poster Boy.

That prompted Dalgety to end the horse’s Chariots Of Fire campaign in favour of a freshen-up.

“He probably still should have won that, but he got sick a few weeks ago and that might have knocked him.”

“I haven’t really got a game plan, but we will probably get him ready for the Taylor Mile and the Messenger.”