Isorich lives a life of relative leisure within reach of the Wyong racecourse but he is also thriving amid the hustle and bustle of Randwick.

Wayne Seelin says he hasn't figured out why the 69-race veteran has suddenly run into a rich vein of form in Sydney, but the trainer has a variety of theories to explain the back-to-back wins.

Sydney's hard tracks and the reintroduction of blinkers for his past six starts are a couple.

The seven-year-old might finally have twigged he is a racehorse despite never living in a stable.

"He's got a big paddock. A lot of days all he does is walk to the dam for a swim," Seelin said.

The trainer acknowledges that relaxed outlook might also have been counterproductive.

"His first 30 starts he just wanted to lay on horses and run about," he said.

"He'd never really seemed to know that he's supposed to be racing. Now it's clicked."

He thought blinkers could be a contributing factor although they were not effective earlier in Isorich's career.

"He wore them for a long time a couple of years ago and they never straightened him out," Seelin said.

Seelin put them back on earlyin his spring campaign and Isorich subsequently racked up three wins and two thirds to push his career earnings beyond $500,000.

"I haven't over-analysed why. I'm just trying for more of the same," Seelin said.

Isorich won a Benchmark 84 Handicap by a head as a $21 chance and a fortnight later, at the same odds, he nailed a Benchmark 90 Handicap by a long head.

He sticks to his preferred 1200 metres in Saturday's Benchmark 88 Handicap, for which he is again at double figure odds to upstage the Chris Waller-trained favourite, New Universe.

Seelin's only concern was the rain that has fallen in Sydney with Randwick in the soft range on Friday.