Given Turnbull has had more than 23,000 starters in his career, if he rates a horse's gate speed it is clear it has good zip.

And in Dunno Jo's case, that zip was good enough to set up victory in the Stu Valentine 4 Bloodstock Ins Pace (1,730 metres).

Driving for Oberon trainer Harry Fitzpatrick, Turnbull was able to claim the lead from barrier two with Dunno Jo ($4.20).

Such was his initial acceleration, the Blissfull Hall x Flyby gelding gapped his rivals by some 12m.

Importantly, Dunno Jo then eased off and was able to steal a pedestrian 33 seconds split for the second quarter of the last mile.

"I've never driven him before, he came out of the gate unbelievable, he was on the bit," Turnbull said. "I just hoped that he'd back off and he backed off in that second quarter beautiful, he got it really cheap and he had a bit left in the end then."

With 800m to go Dunno Jo led by a length over Lady Swiss, who headed up the outside brigade, while No Nay Never sat on his back.

Though that pair of runners, both from the stable of Georges Plains trainer Bernie Hewitt, pressured neither was able to deny Dunno Jo.

He lifted the tempo to get home in a 28.1 seconds split to win by 1.8m over Lady Swiss, with No Nay Never a short half head back in third.

It was Dunno Jo's first win in more than for months.

Turnbull later made it a winning double for the meeting when guiding Im The One ($8.10) to victory in the Central West Tablelands Plumbing and Gasfitting Pace (1,730m).

After going from barrier nine, Turnbull had the Stonebridge Regal x Im Cheeky gelding sitting three back on the pegs with a lap to travel.

Turnbull worked him clear through the final bend and he charged four-wide down the home straight, hitting the lead with around 45m to run.

Given it was the first win in 53 starts for the seven-year-old, Turnbull admitted it was a surprise result.

"This one was a bit of a shock, he's had 50 starts for a couple of placings, but he had a beautiful run and found the line good," he said.