Dallara IR-03/05 IndyCar at Monza Circuit: Chevrolet Flat-Plane Crank V8 Engine Sound!

With great surprise I recorded this Dallara IndyCar at Monza Circuit during the Italian round of the 2020 Maxx Formula series, a championship open to '90s and modern F1 cars (up to 2013), GP2s, F3000s, Auto GPs, World Series, Superleague Formula V12s and many others.
Not being much into IndyCar, especially of the past decades, the car looked like a Dallara IR03/05 gen to me (just because I've tried it a couple of times on iRacing) but more than that I just couldn't have said.

I tried to search some info and now I'm even more confused what actually the car in this video is... unfortunately I forgot to try and look for the chassis number inside the cockpit, which perhaps would have helped me to have a more precise answer. Anyway, for what I should have understood by quickly read the IndyCar history of the first decade of 2000, Dallara introduced the IR-03 as a big update to their IR-00/02 chassis of the previous years. Further aerodynamics updates were introduced in 2005 with the IR-05, which was used until 2011. The car you see here features these last upgrades so it should be one of the IR-05, if it wasn't for the engine...

Starting from 2000, the previous engine formula was changed: displacement was dropped down from 4.0 to 3.5 litres, engines also switched to 180°/flat-plane crankshafts and it wasn't no more madatory to use production-based engines. Starting from the 4th race of the 2004 championship (Indianapolis 500) the displacement was reduced to 3.0-liters using the existing engine blocks in order to curb top speeds in the wake of several crashes including the fatal crash of Tony Renna and the severe crash of Kenny Bräck. At that time the three engines manufactureres were Chevrolet, Honda and Toyota. At the end of the 2005 season, Chevrolet and Toyota shut down their IRL involvement and so Honda became the only standard spec-engine manufacturer in the IndyCar Series starting in 2006 through 2011. The engine displacement was reverted back from 3.0 to 3.5 litres beginning from the 2007 season.

Now, the Dallara IR-05 you see in this video is powered by a Chevrolet engine but with which displacement? Looking at the valve cover, it looks like a Gen 2 3.5 V8 but I don't know if there was a further gen released in the following years and if the valve cover was different than this one (even just to designate the 3.0-litre displacement of 2004/2005). If the car showed here is one of the very few Chevy-powered IR-05 that took part in the 2005 season it must be powered by the 3.0-litre. Otherwise could it be that it was an IR-03 which was upgraded to 2005-2011 aero specs by the current owner? If this wasn't enough to confuse my ideas, on the Maxx Formula's entry list the car was marked as having a 4.0-litre engine.

If anyone has some better info and corrections to be made, I'd be very glad you could share them in the comments section, thank you!

#DallaraIR05 #IndyCar #DallaraIndyCar
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Camcorder: Canon Legria HF GX10 + Canon DM-100 Microphone
Event: GT Open 2020 Weekend - Maxx Formula Round 2
Where: Monza Circuit, Italy

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Видео Dallara IR-03/05 IndyCar at Monza Circuit: Chevrolet Flat-Plane Crank V8 Engine Sound! канала 19Bozzy92