The famed Mighty Mouse is on the brink of claiming the Motul Pro Am Class victory in its final Yokohama World Time Attack Challenge after Rob Nguyen beat his Friday best to set a 1:26.441s.

On Friday the Honda CRX set a new front-wheel-drive lap record, a marker which ultimately stood for less than 24 hours.

A fast lap this morning was spoiled with a wiggle at Turn 6 as Nguyen negotiated the back of Corporate Hill, an effort which proved the precursor to his jaw-dropping lap.

The second session of the day saw Nguyen millimetre perfect around Sydney Motorsport Park, setting the best time on a set of used Yokohama tyres.

Nguyen is confident there’s more to come too, with a set of brand new tyres up his sleeve which he’ll bolt on later today.

Also improving was Sami Sivonen in the Audi R8 1:1, who moved into second in the Motul Pro Class with a 1:29.190s effort.

Sivonen is the leading non-Japanese car in the field and the only non-Japanese car in a podium place across all four Yokohama World Time Attack Challenge classes.

The flying Finn’s effort saw William Au-Yeung demoted to third in a class that boasted three different nationalities in the top three; Australia on top from Finland and Canada.

Early in proceedings, Au-Yeung had improved on his Friday best to set a 1:29.252.

It closed the gap to class leader Nguyen, but the Canadian was unable to push the front-wheel-drive Honda Civic faster and he fell behind the Audi R8.

Nguyen has two more sessions this afternoon to improve his time, and the Spares Box Superlap Shootout this afternoon as Mighty Mouse’s competitive career edges towards a winning finale.

Follow all the action live on live.worldtimeattack.com