Two ACT titles will be decided on the weekend at the Pialligo speedway

"It's fantastic to be back on my home track; I'm really looking forward to it," Stewart said.

The previous attempt to run the ACT title had to be postponed due to rain but the National Capital Motorsport Club has a field of 14 of the 400 horsepower, 500kg speedcars, which produce spectacular wheel to wheel racing.

Expected to strongly challenge Stewart are Sydney speedcar specialists Nathan Smee, Matt Jackson and Matt Geering.

Father of two Stewart, who also races the big-winged sprintcars, described the smaller, lighter speedcars as "flighty, and very tricky to drive".

"There are no aerodynamic aids on speedcars so they are very challenging to drive; they pick up wheels and wheelstand quite easily when there's lots of grip," he said.

ACT Speedway is used so rarely that none of the drivers will know the track, and they will have very little opportunity to set up their cars to suit the track conditions.

"There's a lot of guesswork involved in setting the car up and then once you get a few laps in, you make the adjustments to go faster," Stewart said.

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"I'm really lucky because Dad built the car and knows it well; he can see what it's doing on the track and can usually tweak it to get the best out of it."

A large Stewart fanbase of family and friends is expected to turn out in the team green colours for the ACT title race.

Also on the program will be the ACT Formula 500 title decider, Limited and street stocker sedans. The gates open at 4pm with racing from 5.30pm.