COOPER Murray believes off-season parity changes to the Camaro Supercar have disrupted Erebus Motorsport’s set-up foundation.

The category’s latest visit to the Windshear wind tunnel last December resulted in various aero tweaks, and the Chevrolet was also lumped with ballast prior to Round 1 following Centre of Gravity testing – a process which was questioned by Team 18.

While General Motors has not cried parity, there was a very distinct form swing away from them last weekend at Albert Park.

The opening 11 Gen3 races at the Melbourne venue were all won by Chevs; this time around, the marque had zero representation on the dais in any of the four races (with 11 podiums going to Fords and one to Toyota).

Luck was Murray’s biggest problem, wiped out at Turn 11 in back-to-back races while running strongly, before being an innocent party in the dramatic Sunday first-corner melee.

Pic: Supplied/Mark Horsburgh

It’s left him last in the championship standings and likewise Erebus in the teams’ points.

“This is a weekend that will never be remembered again,” Murray told V8 Sleuth.

More broadly, he commented: “The set-up has changed a fair bit this year compared to last year at the Grand Prix here.

“I thought me and the team got around that fairly quickly here, we did a good job of it to get the car speed to where we were, from where we were on Thursday morning.”

Pressed further about that set-up remark, Murray elaborated: “Look, at Sydney we struggled a lot as well.

“We thought it was just year-on-year changes with the track, but coming to Grand Prix and having the same issues makes us think it’s got something to do with all the parity changes that we’ve done over in the wind tunnel.”

Murray as a rookie last year bagged top-five qualifying performances at Albert Park.

Matt Stone Racing meanwhile went from having five podiums including two wins across the 2024 and 2025 Melbourne SuperSprints to failing to touch any silverware this time around.

Next up is Taupō, where GM had just one podium across three races last year, achieved by then MSR driver Cameron Hill.