IMSA GTP 101: The Acura ARX-06's Internal Combustion Engine

[@Jt7166]

I absolutely love how open these GTP teams are being with their cars, it’s almost hard to believe

[@TheNecromancer6666]

Not really. Its not like P1 where there is a fierce development race. Its BOP Racing.

[@RB26N]

@@TheNecromancer6666 BoP is lame. made for people who want gokart like racing everywhere ffs.

[@TheNecromancer6666]

@@RB26N IT has its pros ans cons.

[@RB26N]

@@TheNecromancer6666 it has its pros for sure but i bet most teams and engineers want a proper duel , if everyone is going to be on same level regardless what engine, aero etc u have then it takes out souls of race car. the variety of cars their engine etc is just for visual sake , the variety in performance is what matters most. now u have no advantage weight wise or aero wise if u go for smaller engine but at cost of low HP or torque and vice versa. in the end the cons outweigh pros imho.

[@TheNecromancer6666]

@@RB26N As an engineer I Agree. But it needs a budget cap. Remember when Audi, Porsche and Toyota ran P1 cars wirh 200 to 300 million Budgets?

[@bigman1247]

Stunning to see a small high-revving engine in IMSA. I'm honestly still in shock they did it in the first place. My favorite little deal with this engine so far is the antilag mid-corner. The sound is so brutal and choppy, yet it's followed by that smooth, suspiciously Indycar wail.

[@ciello___8307]

mazda had the 2.0 four cylinder in their DPI so its not unheard of. Though this motor with indy roots is pretty nuts for a endurance racer

[@Omnis2]

This video needs to be saved for posterity when this car will one day be in a historic series or museum somewhere.

[@mattknupp59]

IMSA rocks. Love the openness. Awesome for motor heads.

[@snafu0o0o]

So this has been amazing series of videos. Love the nerdy details and opportunity to even see and learn so much of this. Makin the racing even more exciting.

[@williampaoli9057]

If you think about it, Acura and Honda are really on top of it especially with their recent domination in F1 man Honda has a very high ceiling right now and I wasn’t surprised to see them come back enough one I knew they weren’t going to just when the championship and end it

[@8power0]

THIS CHANNEL IS THE BEST THING ON KZbin,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, THAT ACURA ENGINE IS TRULY HIGH-TECH WE HOPE THERE WILL BY MANY MORE HIGH-TECH VIDEOS TO COME . WE LOVE THIS CHANNEL CAN'T GET ENOUGH !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[@paulreilly3904]

I only discovered this channel because of the Daytona 24. But it's brilliant coverage with amazing access. Thank you guys from the UK.

[@sprintermaximus]

So impressive the packaging. Car sounds amazing as well. I cannot wait until Saturday.

[@rlhmarines]

❤ I’m loving the technology displayed by all of the new GTP cars.

[@piakleros]

amazing insight from these engines!!! imsa is gonna be fire this year!!!!

[@briandeiwert5911]

If IndyCar ever gets their engine formula figured out and a 3rd engine manufacturer into the series I hope Honda/Acura can put this into the series as was originally intended. Having the data from running essentially the same engine for a year or more in IMSA would be amazing.

[@budyeddi5814]

Love the peek into the engine bay. I Hate that you didn't discuss the ALS though

[@zsteinkamp]

Marshall, I love this series you've put together. A man so in his element is a beautiful thing. :)

[@bcsa]

dear lord, where else can you see such a close-up from a brand new powertrain?

[@st4xor]

Love how it purrs off-throttle ❤️

[@HelmutSenpai]

Can’t wait to watch this V6 dominate the class

[@VirtualRyders]

Wow, I like how they pass air to the clutch plate assembly. Like brake ducts.

[@anels9]

I think for the next coming years, endurance racing is looking very promising in NA and europe. Its so nice to see such different designs, sounds and technology.

[@JuanAntonEgo]

Luv the footage u all get!! That's why I'm ur new subscriber . Great work!!😁👍

[@shredofmalarchi]

Thanks for showing Acura!

[@atlantiacallaecia3676]

I need to work. Stop sending me awesome vids in my labour hours! 😝😘

[@WilfredVeltman]

The turbo seems to be a bit on the small side. Which is good for response. It would also imply low boost levels and therefore an engine delivering a high non-boosted / atmospheric base power. Correct? And if so, is that the result of high compression ratio's enabled by direct injection and perhaps by turbulent jet ignition as seen on Honda's F1 and SuperGT engines?

[@Phipsi333]

dont forget that it's two turbos, so one turbo gets only powered by three cylinders

[@Jarlefinken]

It’s a twin turbo V6, so 1,2l feeding each turbo. I would also think they are using some of the technology from F1 and SuperGT, like pre-ignition and maybe variable intake runner length.

[@D3Vlicious]

As far as HPD have stated, they've worked with HRC in Japan on applying F1 knowledge to how they work the hybrid system, the side effect of which is supposedly the car's unique sound. That said, who knows what else they learned from HRC.

[@robstaccs6128]

@@Jarlefinken There no JIT aka Pre-ignition mention in this video.

[@arndtcraftrace9522]

These are BW EFR7163 units likely to have same specs as their IndyCar engine program... running fairly low boost pressures ( 15-18psi ). As for the exhaust side ( pre/post turbine), all pretty std racecar turbo workings... other than necessary control logic running the EWG. From the mileage'd out units I've held, they certainly don't appear to be ran hard at all, which would indicate, they run a very efficient N/A engine, to begin with. Lot of respect to HPD, Oreca, MSR, and WTR for putting these cars on the box, under such a short/challenging timeframe.. Incredible!

[@argapadan42]

*T H E M A G I C I S I N S I D E*

[@stargazeronesixseven]

HONDA's Acura 2.4L Twin~Turbo V6 >>> Light & Reliable ... Impressive ... Notice Acura seek a lot of others' expertise to make their engines , motors & cars performed even better! 🌍💜

[@ciello___8307]

one of the coolest power units of the rulebook

[@oliver199610]

Amazing insight in these videos! Was wondering what changes they made to the Indy car engine to make it work for endurance?

[@X8X8X8X8X8X8X8X8X8X]

While I appreciate the approach, I believe the large turbocharged engine approach from BMW and Porsche is, as BSport mentioned, the best approach in a BoP formula, as it allows them "to cover all bases". In a pure series of engineering excellence, Honda's approach might turn out to be the best.

[@Jt7166]

Honda didn’t really have a “large” engine to use. This was being developed for Indycar and repurposed for GTP. I’ve watched those videos and he makes some great points, but given how light this engine is and the strategist use of ballast I would almost guarantee this 2.4L engine has a much lower COG than the others. And that matters too beyond just BoP. Not to mention Acura and Mazda has plenty of success in DPi with smaller output than Cadillac or Nissan previously

[@TassieLorenzo]

"the large turbocharged engine approach from BMW and Porsche is the best approach in a BoP formula" I disagree, HPD are here to win. HPD will have chosen the best approach. Acura have certainly embarrassed BMW and Porsche so far. 😉 "Honda didn’t really have a “large” engine to use." They could have used the dry-sump 3.5 twin-turbo V6 from the NSX if that was better. It seems it would not be!

[@X8X8X8X8X8X8X8X8X8X]

​@@TassieLorenzo I am sure they are here to win, and their acceleration out of slow corners was impressive. Potential design advantages due to BoP can be better assessed after a year than a race.

[@Elkins82ify]

Thank you for this behind the scenes footage and info! I could listen to these guys all day!! Thanks again!!

[@regibson23]

Would love more features like this with the other classes.

[@d00dEEE]

What's the port on the back of the primary intake plenum connected to (see 6:06 where you can look in and see the filter)? Do they have a valve to vent off pre-intake pressure to better control boost when the ICE comes off throttle or something?

[@AmbientMike]

Fantastic coverage!!

[@huntGRN]

Incredible. Thanks Marshall!!

[@jacoblangston4765]

I KNEW IT....I KNEW IT WAS THE HPD INDY CAR MOTOR IN THE ACURA

[@Patrick-bu5vy]

If Honda/Acura ever make another NSX it should have a detuned version of this engine.....

[@kanggesruk1622]

Power of Dream!!!

[@stevemcrichards8768]

Class of the field as far as I'm concerned everyone is playing catch up to Honda. Now is the ARX06 going to Le Mans? Is that a certainty for this year?

[@rolandotillit2867]

I'm guessing the fuel injectors are on the exhaust side?

[@Dragonson575]

I get the impression that this engine is heavily inspired by the Honda engine in F1

[@BrotherJP333SP]

Acura are going to be slugging it out in the trenches this year. I think they are going to be on the sharp end especially when it comes to reliability.

[@XLTBlarg]

I hope to see this Acura fighting Toyota in WEC or at least Le Mans in the future. Turbo V6 hybrids are engineering masterpieces.

[@BrotherJP333SP]

@@XLTBlarg Absolutely, maybe they will decide to take part in '24. At least we'll get to see Toyota face off with Porsche and Cadillac.

[@trainman9119]

Can you imagine this Acura GTP but with double the cylinders (V12 😂), no restrictor plates at Le Mans? Can you say Porsche 917 on steroids?

[@fittipaldi7326]

Japanese engine .. french engineer and he throws in a “Top Notch.”

[@321-Gone]

Pier was talking about the cooling distribution. I wanted to hear what he had to say but you cut him off.

[@brandonrose9545]

Correct me if I'm wrong, but that looks like a tiny little McLaren badge behind the stiffening bar on the intake plenum. Anybody know the significance behind that?

[@drewgalbraith4499]

Wouldn’t be surprised if the teams are all using a McLaren ECU as. Spec part for IMSA to monitor engine stats and hybrid usage

[@cademckee7276]

@@drewgalbraith4499 I believe all the cars use Bosch and Cosworth for the electronics. Bosch for the powertrain side and cosworth for the car side

[@silvy3047]

That is definitely a McLaren badge

[@lesnordman1387]

Thank you for this. Pierre, Merci beaucoup! It is tres difficile to speak in this crazy English language. 🙂

[@collinthomas6288]

Incredible

[@funnyshorts6830]

Honda brought f1 technology to gtp.

[@bukwok]

F1 1.6liter V6 hybrid engine is possible finish a 24 hours race..? single engine for something like 12 F1 races .

[@MV-yp8il]

#Indycar derived 💪❤️

[@cdmobley1]

Beautiful

[@DM0407]

surprised to see screw clamps on whatever it is under the radiator.

[@AlistairMaxwell77]

this should have been the new indycar engine.....

[@svenmartin840]

Same engine family as your Accord or Civic totally awesome!!!!!!

[@budyeddi5814]

No sir, Indycar derived. IIRC their previous iterations do have the J series based engine from the Accord and Odyssey though

[@notboeingnotgoing5483]

That is along way from the Buick grenades in IndyCar. Really worried about the future viability of my beloved open wheel series when you look at what HPD and the other OEMs are doing engine wise in the International marijuana smugglers racing association. Hey IndyCar, wake the F up....no new manufacturers ....no new engines...old chassis...leads to no series. As NASA used to say "no bucks $$$, no BuckRogers". Great video

[@XLTBlarg]

What?

[@ALHEALY9110]

😎Cool

[@hieuphan6771]

let'go my favorite brand HONDA POWER OF DREAM

[@Acura_mechanic]

😮

[@Slowcarfastbeans]

A2W intercooler sounds risky for endurance racing.

[@Omnis2]

Shouldn't be a problem. Besides, they have the water pump sitting right there and it looks like an easy swap in case of failure.

[@RimsJobs]

Is this the K24 engine?

[@TassieLorenzo]

No, it's the "AR24e".

[@TheNecromancer6666]

Still that's 670bhp at the wheels. Its not a 670bhp engine. It has around 770bhp.

[@robstaccs6128]

Props to HPD on this build. But comparing it to its arch rival brand Toyota. Its not even close on the engineering side. No JIT or bespoke hybrid system. If HRC were to build a car to attack Le Mans it would have all those things.

[@jimclarke1108]

Not much Tesla in there😁

[@KimiWallrus]

These rules are about as bad as the new Nascar cup cars! What is the fuel milage difference? Does the V6 get a bigger tank than the V8? I'll bet it uses more OR they run twice the boost but either way nobody should have to rap their head around a car that charges during excelration because the rules allow for an extra amount of power as long as everyone plays nice and doesn't cheat the 670hp rule. What the...

[@mardono1]

Let him speak his own language and do subtitles, he is struggling with English.