13 details to know about the Z06's 670-hp LT6 V-8

Asia's Tech News Daily

13 details to know about the Z06’s 670-hp LT6 V-8
© Provided by Hagerty
13 details to know about the Z06’s 670-hp LT6 V-8
© Provided by Hagerty Chevrolet

When Chevrolet unveiled the 2023 Corvette Z06 at the Petersen Automotive Museum, several development engineers were on hand to answer our feverish questions. Corvette chief engineer Tadge Juechter fielded them with grace, but the man of the hour was Chevrolet small-block assistant chief engineer Dustin Gartner. A group of current Corvette owners was in attendance, and the nuts and bolts of the recently revealed LT6 and its astonishing 670-hp output—making it the most powerful production naturally aspirated V-8 ever—was all they wanted to talk about. The DOHC engine did indeed steal the show, and Gartner was a real sport about diving into its nitty-gritty details. Naturally, we pestered Gartner with our own questions to learn about some of the LT6’s details that weren’t in Chevrolet’s press release. Let’s take a look!

The LT6 is nicknamed “Gemini”

13 details to know about the Z06’s 670-hp LT6 V-8
© Provided by Hagerty Chevrolet

If you watched Chevrolet’s launch video for the Z06, you likely caught a glimpse of a rocket that was very conspicuously placed on the engine’s front cover. In order to keep information from slipping by using any sort of identifiable nomenclature that might tip anyone off, engineers nicknamed the LT6 “Gemini”. It’s a nod to the Corvette’s link to NASA astronauts and a highlight that this Corvette team’s “moonshot”—a lofty goal to build a naturally aspirated V-8 that would surpass the LT4. In addition, Gemini is represented by the Roman numeral II to represent the constellation’s famous twins, and the LT6 has twin intake plenums and twin throttle bodies. The rocket cast into the engine’s front cover—which also has a Roman numeral II—is one among dozens of easter eggs found in the engine bay. Gartner didn’t tell us how many exactly but gave us a hint, “There are actually more inside the engine than outside,” he said. The Gemini rocket is used on each piston as well as just about anywhere inside the engine where a part would need to be marked for proper installation orientation.

Five camshafts

13 details to know about the Z06’s 670-hp LT6 V-8
© Provided by Hagerty The LT6’s DOHC heads use twin cams and finger followers to operate the valves. Both the intake and exhaust cam can be phased individually. Chevrolet

Yeah, there are two camshafts mounted above each cylinder head, each activating two valves per cylinder, but there’s also a camshaft mounted in the valley. This isn’t kind of vestigial leftover from the small-block’s evolution to an overhead cam valvetrain, either. Instead, this short, two-lobe cam drives a pair of high-pressure fuel pumps that each supply fuel for one bank’s direct injection system. Nestling the pumps in the valley between the cylinder heads and below the sizable intake manifold helped to muffle the noise inherent in those high-pressure pumps.

It has virtually nothing in common with Cadillac’s Blackwing V-8

Some early rumors indicated that the LT6 would be based on Cadillac’s twin-turbo V-8 that also happens to use DOHC architecture. That’s not the case. The block, heads, cams, and intake are all unique to the LT6, although there are some ancillary parts shared with other engines, like the twin 87-mm throttle bodies, which actually are found on the Blackwing V-8.

The pistons are made by CP Carrillo

13 details to know about the Z06’s 670-hp LT6 V-8
© Provided by Hagerty Chevrolet

CP Carrillo is known in the aftermarket for making tough, reliable pistons for racing applications and the LT6 demanded lightweight, low-profile pistons that would survive at high engine speeds. CP Carrillo is one of the most esteemed aftermarket manufacturers and seems like a good partner for supplying a tough forging for the LT6.

Diamond-like carbon coatings are used on multiple engine surfaces

13 details to know about the Z06’s 670-hp LT6 V-8
© Provided by Hagerty Chevrolet

Diamond-like carbon (DLC) coating gives metal a tough, thin, low-friction surface to reduce heat and wear. You will find it on many of the wear surfaces inside the LT6, including the mechanical finger followers that transmit lift from the camshaft to the valve as well as the piston rings.

It’s not designed for short service intervals with lots of maintenance

13 details to know about the Z06’s 670-hp LT6 V-8
© Provided by Hagerty Chevrolet

Gartner was adamant that the LT6 is not like a typical exotic car engine, “that you have to take apart every 10,000 miles” for valvetrain adjustment or some kind of rebuild. “At the end of the day, this is a Chevy. Our expectations are that of any other Corvette we’ve sold.” Thank the DLC coating for part of that durability. “It’s long-term bulletproof.” Gartner said, “Even though we have a true mechanical valvetrain that’s lashed at the plant, the surface treatments, the DLC coating, and all our validation … it’s lashed for life.”

The LT6’s front damper is aluminum

13 details to know about the Z06’s 670-hp LT6 V-8
© Provided by Hagerty Chevrolet

A flat-plane crank removes a lot of mass, somewhere in the range of 30-40 percent compared to a cross-plane unit. According to Gartner, the aluminum, viscous-filled front damper on the LT6, is also “drastically lighter” than an iron elastomer damper like the one found on the LT2. The rear flywheel-side damper is similar to the one on the LT2 but is also lighter.

It runs a 70-degree Celsius (158-degrees F) thermostat and has an abundance of coolers

While the engine is designed to run around “mid-90s to 100 degrees C” (as you’d expect), the thermostat is actually a bit cooler than most. “It’s hard to get this engine hot, hot.” Gartner said, noting that the two radiators on the side pods are dedicated to the engine and the transmission oils.

“The bulk of the hot coolant comes out of the engine, goes forward, gets cooled by three radiators, and comes back to the water pump. Most of that then goes to cool the engine. The water pump pulls off fresh coolant to the two side radiators, which then step it down even colder.” The driver-side heat exchanger is dedicated to the oil cooler, which circulates the coolant to the biggest engine oil cooler Chevrolet has ever installed. It keeps the 5W-50 oil—specifically selected because it provides ample lubrication and allowed engineers to optimize bearing widths—very cool. The passenger-side heat exchanger does the same but cools the transmission. “This is rock solid from a thermal perspective,” Gartner promised.

The intake and exhaust tuning virtually supercharge the engine

13 details to know about the Z06’s 670-hp LT6 V-8
© Provided by Hagerty Chevrolet

The plenum and large, tapered velocity stacks definitely work as intended and, as Gartner pointed out, are unique to each valve. At the engine’s 6300-rpm torque peak, volumetric efficiency is at 110 percent, and at the horsepower peak 2100 rpm later it’s still 106 percent. What does more than 100 percent mean? Answer: Each cylinder is being crammed full of air so efficiently that it’s moving more air than the cylinder displaces. That’s possible by tuning the intake and exhaust tract so that the incoming air has enough momentum to cram air into the engine as the valves are closing.

The plenum is tuned for peak volumetric efficiency, most of the time

13 details to know about the Z06’s 670-hp LT6 V-8
© Provided by Hagerty Chevrolet

The twin plenums atop the LT6 work in unison by breathing through an 87-mm throttle body. There’s also another set of valves that open up between the two plenums to allow them to work as one. Three equally-sized butterfly valves link the two sides of the plenum. Two of the three are linked together and the rear valve operates independently. Gartner explains, “At different speeds you want a different amount of communication between the two plenums to maximize the tuning at that speed. Otherwise, it would only want to tune at one engine frequency, one rpm. With the communicator valves, we can open up that tuning window where we get volumetric efficiency greater than one. Throughout the rpm band, those valves will change half a dozen times.”

That tuning will also vary depending on which drive mode has been selected. “We found at full load, if you’re tuning for max torque, you get a lot of good induction noise,” he said. That’s great for all-out performance, but it might be distracting if you’re cruising, so the communicator valves operate under a different schedule in Tour mode to keep things a bit more subdued.

Each engine will have a 20-minute dyno break-in cycle

While the car will likely have a suggested 500-mile break-in period before it should be subjected to any all-out track shenanigans, the engine will already have a 20-minute dyno break-in where it’s warmed up and put through its paces and finally run at 7600-rpm for a WOT pull.

It uses a cartridge-style oil filter

13 details to know about the Z06’s 670-hp LT6 V-8
© Provided by Hagerty Each LT6 will be hand-assembled by a master engine builder at Chevrolet’s Performance Build Center located within the Bowling Green Assembly Plant in Kentucky and will wear the technician’s signature on its intake manifold. Chevrolet

Being the largest flat-plane V-8 in production means that there will be inevitable vibrations. Having a light rotating and reciprocating assembly will reduce the severity of these vibrations, but at some point, as Gartner put it, “you have to tolerate it.” A low-torque, spin-on oil filter canister is in danger of vibrating itself loose on an engine like this, so Chevrolet opted for a cartridge-style oil filter for the LT6.

The dry sump lets the crankshaft spin in a near-vacuum

13 details to know about the Z06’s 670-hp LT6 V-8
© Provided by Hagerty Chevrolet

The LT6’s bottom end is divided into four bays, one for each throw of the crankshaft, with each one isolated from the others. A pump pulls oil and air from each bay to evacuate oil. Not only does the crankshaft not have to whip through oil, which saps power, but at nearly 80 kPa of vacuum, there’s also not a lot of air resistance either. A side benefit is that it keeps the rings at the bottom of their grooves as the pistons approach BDC for better sealing.

Two additional pumps pull oil from the front cover and the cylinder heads, but those are low-vacuum. The entire system is designed to put oil back into the tank so that it cam be ready to be pumped out to where it’s needed. It’s not sitting around where it’s getting in the way or not doing any good. As Gartner explained, “At max engine speed, there’s more oil in the tank than at any other time.”

Internet Explorer Channel Network
Asia's Tech News Daily
News Related


Einfaches Rezept für unwiderstehliche Waffeln: Mit DIESEM Tipp werden sie zu etwas ganz Besonderem

© Bereitgestellt von Berliner Kurier Leckere Waffeln sind einfach unwiderstehlich. Wenn der Duft durch die Wohnung zieht, sitzt ratzfatz die ganze Familie am Tisch. Einziger Nachteil: Wie gut sie wirklich ... Read more »

Buying the Omicron dip

Read more »

Makin menyerlah dalam bidang robotik, Ustaz Ismail sasar kejayaan berganda pada masa akan datang

Baru tiga tahun Guru Cemerlang Hifz al-Quran Sekolah Menengah Kebangsaan Agama (SMKA) Kedah ini melibatkan diri dalam bidang robotik. Dalam tempoh tersebut, pelbagai pencapaian luar biasa telah diraih oleh guru ... Read more »

Delhi Police arrests dreaded criminal Pramod Mulla

Delhi Police arrests dreaded criminal Pramod Mulla The special staff of the North Outer District arrested a dreaded criminal, Pramod Mulla who along with his friends, assaulted and robbed a ... Read more »

Nagami 3D prints "aesthetically pleasing" portable toilet using plastic waste

Discarded plastic medical equipment from hospitals across Europe was melted into a filament and 3D-printed to create the mobile toilet cubicle The Throne, designed by Spanish studio Nagami for the ... Read more »

FTSE 100 to rebound as oil rallies despite worries over Omicron variant – business live

LIVE – Updated at 07:52 © Photograph: Jérôme Favre/EPA An electronic board displaying the Hang Seng Index in Hong Kong today, where shares have dropped Rolling coverage of the latest ... Read more »

Omicron: Japan joins Israel in banning all foreign visitors as Australia reviews reopening plans

© AFP via Getty Images AUSTRALIA-HEALTH-VIRUS Japan is joining Israel in banning foreign visitors while Australia announced it will review plans to reopen borders as the new coronavirus variant Omicron ... Read more »

UK carpet maker Victoria to buy rugs division of Belgium's Balta

(Reuters) – Flooring products maker Victoria Plc said on Monday it would buy the rugs division along with UK polypropylene carpet and non-woven carpet businesses of Belgium’s Balta Group NV ... Read more »

Migrant crisis: Why do so many people head to the UK and where are they coming from?

Read more »

The ultimate festive gift guide for the foodie in your life

© Motivate Publishing Foodie gift guide When it comes to the festive season, you can never go wrong with a foodie gift. From Christmas hampers to premium cheese boards, there ... Read more »

Lizzie Bravo, Beatles fan who found herself singing on the band's song Across the Universe – obituary

Lizzie Bravo with John Lennon Lizzie Bravo, who has died aged 70, was a member of the “Apple Scruffs”, the gang of teenage girls who used to hang around Abbey ... Read more »

Mask wearing and travel testing to come into force on Tuesday

Mask wearing and travel testing to come into force on Tuesday Sajid Javid has confirmed that the new mask wearing rules for shops and public transport will come into force ... Read more »

Bangladesh doctors fear for opposition leader Khaleda Zia's life

© Provided by Al Jazeera Zia has been diagnosed with cirrhosis of the liver [File: A M Ahad/AP] Bangladesh doctors treating ailing opposition leader and ex-Prime Minister Khaleda Zia say ... Read more »

Man, 40, charged with murder of missing mum-of-two Alexandra Morgan who vanished over 2 weeks ago

A MAN has been charged with murdering a mum-of-two who vanished 15 days ago. Alexandra Morgan, 34, was last seen at a petrol station near Cranbrook, Kent, on November 14. ... Read more »

Strictly's Dan Walker hits back at trolls who call him a ‘disgrace' after making it to quarter finals

DAN Walker has hit back at Strictly Come Dancing fans who branded him a “disgrace” after he made it through to next week's quarter finals. The BBC Breakfast host, 44, ... Read more »

Royal Family's lawyers ‘on standby to take action against BBC over “unfounded” documentary The Princes and The Press'

LAWYERS for the royals are reportedly on standby to take action against the BBC for “unfounded” claims made in a controversial doc. It's claimed members of the family are mulling ... Read more »

Long Island cops investigating second French bulldog dognapping

Zushi, a 3-month-old male puppy, was dognapped from a house in Bay Shore either Saturday or Sunday. Suffolk County Police Department A French bulldog was snatched from a Long Island ... Read more »

TMC skips opposition meet called by Congress, 10 others attend

© Provided by Hindustan Times Mamata Banerjee led outfit hopes to replace the Congress to become the principal opposition force nationally. (AFP Photo) The Trinamool Congress skipped the meeting of ... Read more »

UP SI (confidential), ASI (ministerial, account) exam from Dec 4: UPPRPB

The exam for the selection of candidates to SI (Confidential), ASI (Ministerial) and ASI (Account) posts will be held on December 4 and 5, the Uttar Pradesh Police Recruitment and ... Read more »

Parliament Winter Session: Farm Acts Repeal Bill passed in Lok Sabha without discussion

© Provided by Firstpost Parliament Winter Session: Farm Acts Repeal Bill passed in Lok Sabha without discussion The Lok Sabha on Monday passed the Farm Acts Repeal Bill amid ruckus, ... Read more »

Share Market Updates: Sensex zooms over 450 points, Nifty above 17,100; RIL gains 3%

© Provided by Business Today Share Market Updates: Sensex zooms over 450 points, Nifty above 17,100; RIL gains 3% Benchmark indices were trading higher in afternoon session today, led by ... Read more »

The Farm Laws Repeal bill passed in Lok Sabha

© Provided by Business Today The Farm Laws Repeal bill passed in Lok Sabha The Farm Laws Repeal Bill, 2021 was passed today in the Lok Sabha without any discussion. ... Read more »

Kotak Mahindra Bank jumps 2.5%; what's fuelling buying in the stock

© Provided by CNBCTV18 Kotak Mahindra Bank shares recovered initial losses to move higher on Monday after the Reserve Bank of India (RBI) raised the permissible promoter holding in private ... Read more »

Sovereign Gold Bond Scheme opens today: Check price, discounts, tenure and other details

Sovereign Gold Bond Scheme opens today: Check price, discounts, tenure and other details The Series VIII of Sovereign Gold Bond Scheme 2021-22 will open for subscription from Monday, November 29, ... Read more »

Authorities to trace co-passengers of SA returnee who tested Covid-19 positive

© Provided by Hindustan Times A file photo of the entrance of the Chhatrapati Shivaji International Airport in Mumbai. (REUTERS) The Brihanmumbai Municipal Corporation (BMC) on Monday said it will ... Read more »

BMW seeks temporary import duty relief for electric vehicles in India, to launch three EVs in six months

© Provided by Firstpost BMW seeks temporary import duty relief for electric vehicles in India, to launch three EVs in six months While it may be late to the party, ... Read more »

Covid: 12 more test positive at Thane old age home in Thane, tally touches 67

© Provided by Hindustan Times Thane has so far recorded nearly 5,70,000 cases and 11,581 deaths due to the coronavirus disease. (Yogendra Kumar/HT file photo. Representative image) Twelve more people ... Read more »

Coin Master free spins and coins links (November 29, 2021)

© Provided by GamePur The main objective of Coin Master is building your village by spinning a slot machine and collecting coins to buy upgrades. Additionally, you can raid and ... Read more »

Taiwan scrambles to see off Chinese air force as Xi meets top brass

© Provided by BusinessWorld TAIPEI — Taiwan’s air force scrambled again on Sunday to warn away 27 Chinese aircraft that entered its air defense zone, Taiwan’s defense ministry said, the ... Read more »

A list of 7 makeup brands that will never let you down, ranked by a beauty editor.

© Getty Images A list of 7 makeup brands that will never let you down, ranked by a beauty editor. If there’s one thing I love doing more than pestering ... Read more »

Britain to unveil new booster guidance as Omicron variant spreads

© Reuters/TOM NICHOLSON New measures imposed due to the Omicron coronavirus variant, in London By Alistair Smout LONDON (Reuters) -Britain is set to unveil new guidance on extending the rollout ... Read more »

Living Life to the Fullest in Your 50s

By the time we hit our 50s, we will start to notice more and more changes in our body and overall health. © Provided by LionhearTV Our body’s needs have ... Read more »

Australia looks set for May 2022 election as budget brought forward

© Reuters/POOL FILE PHOTO: Australia’s Prime Minister Scott Morrison speaks as National Statements are delivered as a part of the World Leaders’ Summit at the UN Climate Change Conference (COP26) ... Read more »

Watch: Roy Keane and Jamie Carragher's furious Cristiano Ronaldo argument in full

© Provided by Extra.ie Keane Carragher Row Roy Keane and Jamie Carragher got into a major row in the Sky Sports studio on Sunday about Cristiano Ronaldo and whether he ... Read more »

China Omicron: Beijing says 'no major action' needed

As countries around the world scramble to impose travel bans to stem the spread of the Omicron coronavirus variant, China remains outwardly calm — at least for now. © Andy ... Read more »

UK economy triumph: British growth surpasses China for first time in 40 years

China is the factory of the world, but supply chain disruption and soaring energy prices are hindering the nation’s ability to keep up with demand. The world’s second-largest economy has ... Read more »

Boris Johnson should use his levelling up agenda to tackle soaring housing costs, says Theresa May

Millions of families face a cost of living crisis over rents, says Theresa May, as she urges Boris Johnson to put tackling “exorbitant”  housing costs at the heart of his ... Read more »

Timo Meier erreicht Marke von 20 Skorerpunkten

© KEYSTONE/AP/Nam Y. Huh Timo Meier ist bereits nach 16 Spielen bei der Marke von 20 Skorerpunkten angelangt. Der 25-jährige Appenzeller erzielte in der Nacht auf Montag beide Treffer zum ... Read more »

«Ich bin mir sicher, dass ich wieder der alte Tauli werde»

Taulant Xhaka steht beim 3:1-Sieg des FCB in Luzern in der Startformation – etwas, was in dieser Saison nicht mehr selbstverständlich ist. © Foto: Martin Meienberger (Freshfocus) Zupackend in Luzern: ... Read more »

Das «Ja» zum Covid-Gesetz war eindeutig – das fordern die Befürworter nun

© keystone Teaserbild «Die Demokratie funktioniert», sagte Gesundheitsminister Alain Berset nach dem klaren «Ja» zum Covid-Gesetz. Denn 62 Prozent der Stimmberechtigten haben sich zum Covid-Gesetz – und damit zum Corna-Zertifikat ... Read more »
On free-english-test.com you will find lots of free English exam practice materials to help you improve your English skills: grammar, listening, reading, writing, ielts, toeic