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Video: Horsepower Heroes dyno record shattered!

By Street Machine Magazine | 8 January 2026

The Haltech Horsepower Heroes competition is off to a flying start at Street Machine Summernats 38, with Darren Portelli’s twin-turbo big-block powered HQ Holden shattering the Aussie dyno competition record with a wild 3513hp pull in the MPW Dyno Cell. “I’ve never seen a car go anywhere near that in competition in Australia – nothing…

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Video: Summernats 38 tech day!

By Street Machine Magazine | 8 January 2026

The 2026 Street Machine Summernats 38 is here! With a bumper field of entrants, tickets flying out the gates for punters and scorching heat, it’s already shaping up to be one for the history books. Before we get into the full pace of the weekend, entrants need to go through scrutineering at GIO Stadium to…

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