The 2023 Corvette Z06 has made its long-awaited debut, appeasing American performance enthusiasts with a naturally aspirated, flat-plane crank V8 engine producing an impressive 670 horsepower.
Chevy says the all-new 5.5L LT6 V8 featured in the 2023 Corvette Z06 is the highest horsepower naturally-aspirated V8 ever offered in a production vehicle. The engine features a lightweight, low-inertia rotating assembly with a flat-plane crankshaft, enabling a sky-high redline of 8,600 rpm. Other highlights of the dual-overhead camshaft motor include an all-aluminum cylinder block, forged aluminum pistons, forged titanium connecting rods, an active split intake manifold with twin 87 mm throttle bodies and a racing-inspired dry-sump oiling system, among more. Output is GM-estimated at a healthy 670 horsepower and 460 pound-feet of torque.
Power in the 2023 Corvette Z06 is sent to the rear wheels through the eight-speed dual-clutch transmission with a shorter 5.56 final drive ratio, further helping to give the Z06 superior acceleration over the Stingray. Chevy’s now-familiar electronic limited-slip differential is also present and works with a new track-specific Performance Traction Management system to put power to the pavement. Available when Track mode is activated, Chevy says the Performance Traction Management system in the Z06 offers five settings of torque reduction and brake intervention, allowing the user to tailor it to their needs when out on the track.
Braking in the “standard” Z06 is handled by a set of 14.6-inch-diameter front and 15-inch-diameter rear Brembo brake rotors, along with front six-piston and rear four-piston Brembo calipers. The 20-inch front wheels are shod in wider 275/30ZR20 tires, while the larger-diameter 21-inch rear wheels are wrapped in a set of 345/25ZR21 tires. Michelin Pilot Sport 4S ZP tires are standard equipment as well. These standard models offer available Magnetic Ride Control suspension and are equipped with monotube shock absorbers front and rear.
Customers who crave even more performance can opt for the available Z07 Performance Package. The Z07 pack takes the performance of the C8 Corvette Z06 “to its zenith,” Chevy says, adding larger, carbon ceramic 15.7-inch-diameter front rotors and 15.4-inch-diameter rear rotors, along with stickier Michelin Sport Cup 2 R ZP rubber, FE7 suspension with specially tuned Magnetic Ride Control 4.0 dampers, and available carbon fiber wheels that deliver a 41-pound reduction in unsprung mass. All Z07-equipped models also receive a full carbon fiber aerodynamics package with a larger front splitter, front-corner dive planes, a rear wing and an underbody strake. The aero kit produces 734 pounds of downforce at 186 mph.
Inside, the Z06 offers available carbon fiber-wrapped steering wheel, carbon fiber dash/door trim, three different seat choices and six seat belt options. A head-up display is also standard, relaying important information to the driver even while their full attention is on the track ahead.
Chevy says the 2023 Corvette Z06, which will be offered in both Coupe and Convertible body styles, will have a total of twelve available exterior colors from launch, along with seven interior colors and six different brake caliper colors. There will also be eight available wheel packages, including six finishes on the standard forged aluminum wheels and the aforementioned carbon fiber wheels. Production of the 2023 Corvette Z06 will begin at the GM Bowling Green Assembly plant in summer 2022. Chevy has not yet confirmed pricing or fuel economy figures, but mentioned a 0-to-60 mph time of 2.6 seconds, and Z07-equipped cars can circle a 300-foot skidpad at 1.22 g.
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Comments
0-60 was mentioned 2.6 seconds
yea I saw that too, likely with the * one foot roll out
From what I gather, they are handicapping the gen V small block to give people something they always wanted, because this may be the last gasoline powered Corvette. The 6.2 could easily make 575 hp, and if they had the same aero, weight, and final drive ratio, the small block would cut this 5.5’s @$$ on a track. I realize gm wants to show Europe they can too, but don’t give up on the small block so easy. I was honestly hoping to see a twin turbo lsx type engine under the hood of a C8, but I guess that’s just a dream.
lolol this isn’t even close to being the last gasoline powered Corvette.
Sorry, but you are wrong… 575 is a stretch for the NA conventional LT engines, and does not provide the global excitement this does. It also would not win on the track as the LT6 making 100 more HP at a higher RPM gives the engine a mechanical advantage when it comes to gearing compared to the lower revving pushrod engines. DOHC make more average power over a wider range of RPM, that simply the facts. They also can do more special cam phasing which helps meet emissions, and make them more drivable. Yes, the LT6 sounds better too.
LSX is a race engine, not a street engine, does not meet emissions, and won’t last through the warranty period. You will see a twin turbo version of the LT6 in the ZR1 in 2023
You’re full of it and know not of what you speak. As an engine builder 1000hp out of a specified carbureted engine is now routine, granted that is no emissions and with very good components. This is using a basically stock block.
Sure, 1000 HP is easy today but for an OEM to market a car it has to meet current emissions, and last through the warranty period with any idiot driving it. The engine also has to fit in the engine compartment. In the C8 you have very specific space, and thermal requirements. OEM’s also rate cars with SAE NET HP, do you know what that means?
Please go into detail on what I am full of, the more detail you provide the more I will embarrass you when I reply
BTW, a an engine builder you do not think making engine HP at higher RPM is a mechanical advantage? Thats one you really should do your homework on, as in every form of racing they build engines to turn the maximum rpm they can mechanically, or is allowed, suppose there is a reason for that? Not too many low RPM torque motors win in racing. Every class of racing engine I have worked with, more RPM is the common denominator to winning, An NA engine is just an air pump, and if you can make it work more efficient at higher speed then your competitors, you win. It was true when I started in the 1980’s just as much today.
Tadge Juechter has previously stated they had reached the limit of how much power the C7 chassis can put to the ground being a front engine car. The C7 Z06 with so much torque 650lbs-feet @3600RPM especially has trouble in the corners.
The faster (MPH) you exit a corner the quicker you reach top speed down the straight leading to the next corner, correct?
The C8 Z06 still has plenty of torque with 460lbs-feet, it just arrives later in the rev range @6300 RPM. More of a corner exit speed RPM and with 2300 higher HP RPM’s left the gap between the C7 and C8 is going to grow corner after corner on the track.
Nürburgring has 154 corners, any guess’s to a lap time for the C8 Z06?
C8 Z06 will embarrass even the C7 ZR1, with ease on the track, and be easier to drive to boot.
Precisely my point!
The only 1,000 hp NA motor that I know of is the 632 ci. It makes 1004 hp. Small motors with less ci even when pushed beyond 10,000 rpm do not make 1,000 hps.
Donavan LT engines can make an easy 575 HP and still be streetable. As far sa the LSX not lasting past the warranty is also not true. Those engines are very durable, and easily last way past warranty time. Could easily go 100,000 miles plus if need be.
God, I wish John Lingenfelter was alive to work his magic on this LT6!!
Well then, you should be pleased to know there are other tuners like Hennesey doing similar magic. The problem though, the encrypted ecus and the amount of integration these electronic systems have within the entire vehicle’s total control package. These may never be able to be cracked. Maybe, if they have the right people, they can develop a replacement that will play well with the rest of the systems on board. Currently, the best ones I have heard of thus far are added ecus that control additional fuel and air that piggyback on the GM systems, so they can still operate the car. But, even that has limitations. The best solution is that GM allows for 3rd party tuners in some way, maybe a subscription or licensing arrangement. Til then, its going to be a different world with tuner C8s, as has been the case thus far.
Best you avoid doing battle with that person for they know everything there is to know about engines and no one else knows anything. Don’t tell anyone here about the Audi TDI prototypes that dominated not long ago. Yeah, those engines rev’d so high and produced very little torque, not, LOL. Being fast has nothing to do with how many RPMs an engine can turn, it has everything to do with managing the power band with respect to getting that power to the ground. And last I thought, more torque helped getting out of corners. The mid engine moving the mass to the rear over the rear tires does help, and changes how the car handles literally, but, then, have to ask, why Mercedes, BMW and Aston are all competing in the same GT based series with, yep, you called it, front engine sports cars. Maybe they didn’t get the memo. As far as high HP LS and LT motors, best no one talks to Mast, Blueprint Engines, or Edelbrock. Shhhh, lets keep that a little secret of ours. And don’t tell anyone, I am running an SBC Gen 1 with 10.5 CR, full roller, solid lifter cam, EFI, 550HP, turns 7500 RPM all day long, on pump gas, will pull higher on race gas. Just depends on how you build them. But, let’s not let that get out either.
Emissions is the key
It is, and 2023 Emissions are tough… With the OHC, and separate intake and exhaust phasing you can adjust a lot, which helps meet emissions. There are some cool tricks and gadgets in the LT6 heads and intake. This was likely the most difficult part of designing and tuning this engine.
The half ton trucks are getting new power plants for the 2025 generation. I bet we see a carryover/update of the 2.7, maybe an updated 3.0 depending how the world feels about diesel by then, and any V8s on offer might be DOHC. I’m not sure we’ll see another generation of OHV V8s
I think in 2025, the trucks will see several hybrid options. Hybrids make so much sense in half ton trucks, and ford has been very successful with their F150 Hybrid. Personally for a half ton truck I would only be interested in EV, as none of GM’s engine offerings impress me today. 6.2 is a gas guzzler, 5.3 is weak, 2.7 is ok, but I do not like 4cyl, and the 3.0 duramax is the best option, but does to do it for me. For the price they cost today, I would just buy an HD (oh Ya I have a 2020 Denali HD) so much more capability and power for the money. The HD’s also hold their value better.
The 6.2 is NOT a gas guzzler. I have 213k miles on mine – in a Sierra 4×4 crew cab – and have averaged 20.6 mpg over the entire life of the truck. At least two mpg better than any 5.3 I’ve owned, and better than my Duramax.
Wow, you have done great with fuel economy, my 6.2 experience was not as good, best combined driving cycle in my old Denali pickup was 15 mpg, and usually got worse than that. I drive my HD diesel hard, and never been that low, my worst tank was around 14.8 mpg, in snowy conditions, but highway I usually get just over 20 mpg (calculated on fill-ups). Best tank, 24.5 mpg.
DOHC is what we’ve been waiting for.
The Corvette or Stingray has never looked good with a spoiler on the rear and what is going on with the side door area ??? Chevy trying to build a cheaper Ferrari or Lamborghini, Wow
Step aside sir there are plenty of people that love it and wait months for delivery.
Yea because they can’t afford the above cars mentioned.
An affordable exotic that can actually be DRIVEN. However, there WILL be a first year for C8 Z06 also, beware.
If you watched any of the vids, they mention it’s because of additional cooling needed.
Masterpiece, Can’t wait to see more details, the laps time and see it in person.
Incredible. Bravo to all of the engineers and designers. Truly a feat.
Was the Ring times released?
It never ran a clean lap… Tesla Model S Plaid (and a BMW prototype) crashed and killed C8’s chances at a clean lap due to guardrail damage and track closure (was reported in the Media). Unofficially a lap was timed with traffic on the track at 7:12 So it will likely be in the very low 7’s, maybe high 6’s when they get a chance at a clean lap.
They went to the ring again afterwards on a different session.
Ya, but it was raining, wet track
This basic engine has been available for a few years, Mercury Marine has produced a DOHC LS marine engine with 750 hp for quite sometime!
Again, Apples and oranges.. Mercury engine does not meet emissions, is 7L, and is rated in gross HP, not SAE NET.
The LT6 is done by Cosworth, if you want to go see it they are in Shelby Township outside Detroit where they are making the parts.
As a renowned engine builder you claim to be I figured you would at least know that.
Wow ,the base z06 with no rice z07 kit is insane. 5uck the overpriced and noisy 911. I love it. Well done Gm.
That’s strange most people enjoy hearing the engine. You must like EV then. You can say what you want but the 911 will always be a great car and have a huge following.
911 is a good car, it just sounds like an angry Camry
Yea that is a ridiculous statement. Thank god nobody takes you serious.
Thank god nobody agrees with you.
Hmm well people are agreeing with me but I see you are getting downvoted. Which isn’t a surprise given your past comments on here.
Andrew You need to hear the RSR Porsche’s on the track or even live. They are the best sounding of all. When I heard them at the track, I got goosebumps everytime they flew by.
I’m guessing 150-170k after dealer mark up?
Corvette Conti not marking them up, and plenty of other dealer will not either, but plenty will, it pays to do your homework before ordering.
GM won’t allow mark-ups on new C8s unless they want to lose future “allocations”, says Rick Conti
Right now as I type 20k mark up for a 2022 Corvette at Stevens Creek Chevrolet in San Jose California. MSRP $89,195.00 and I guarantee they won’t lose allocation privileges.
Ya, by law GM cannot control their dealers on pricing , they are a separate businesses, and GM would have big legal problems if they cut off franchise dealers. GM could buy their franchise, but other then that dealers can basically do what they want.
Without a factory allocation slot there will be no vehicle delivery. Watch it on YouTube yourself. I own one and don’t b1tch about the added expense of piloting a truly unique vehicle.
P.S. From day one a group of elite volume dealers pledged no “mark-ups” would be allowed to ensure volume sales my dealer had over 200 sales of C8s in 2020, not one was sold for over sticker.
Run that by a lawyer versed in franchise, and anti trust law… GM cannot cut off a dealership for that specific reason without offering to repurchase the franchise at what the franchisee feels is fair market value as it would violate USA anti-trust law. Dealers can pretty much do whatever they want, and if GM plays hardball with them, they will be in court and GM will lose. This is what sucks about the franchise dealer model.
Watch Rick Conti on a regular basis to keep up on the truth. He updates at least twice a week and shows and reads all the update memos right from GM on his youtube channel.
Come on, at the core of the matter Conti is a salesman, Not a legal expert. This gets right to the core of franchise law, and GM will tell you that. GMC is fighting the same thing on the HummerEV, and bottom line GM told reservation holders you have to work it out with your dealer. Smart way to do it is to work out a deal before you order, and get it in writing. GM can strongly suggest they prefer cars to go at MSRP, but cannot force dealers to abide, just like they cannot force dealers not to rip you off on extras you did not ask for, and rip you off on warranties or financing.
85K base price and go to a reputable and there will be no markup.
Can’t wait to see people crying about dealers overcharging on these.
Don’t know what dealers mark up but my dealer in Charlotte will not mark them up. I even got a $1000 off on my C-8 convertible.
Finally a mid-engine Corvette with a DOHC engine! An amazing achievement for gm. It took a long time getting here but bravo to Tadge and his team. They’ve created a monster and the personification of many Corvette dreams for 50 years. This is the engine the C8 deserves. I seldom say bravo to gm any more because most every thing comes out compromised but this car looks to be deserving of accolades. I still wish for a Bill Mitchell design to house the wonderment of the chassis and engine but the ZO6 is a improvement on that front too so, well done Corvette team! I’m impressed.
I don’t care what anyone says this orange is such a cool color, I’m so glad they decided to show the Z06 in it. Now to just see this in person 😁
Thank god, for what Chevrolet knows best (as much as they don’t want to admit it), the American V8.
What is the curb weight?
The lighter Z07 coupe is 3434lbs. Not sure what the heavier base Z06 will be, or the convertibles.
Where did you find that weight? That would be remarkable if true
Thedrive.com
“A Z07-equipped Corvette can achieve 1.22G of grip around a skidpad, and it’s also the lightest version of the car at 3,434 pounds. Chevy doesn’t note how much heavier non-Z07 cars are or indeed how much more the convertible weighs, though it does note that since the C8’s chassis is so stiff, there’s no difference in the suspension tuning between the coupe and convertible Z06.”
Wow, Sweet, so it is 250 lbs lighter than a Z51 which C & D scaled at 3689, thats amazing. I was assuming 50-100 lbs off would be great
Don’t understand the downvotes?
People can downvote what they want doesn’t matter if you understand or not. Do you seek the approval of random strangers on the internet?
If you comment and say “GM is the best! America!” You will get countless up votes, if you speak with intelligence and facts you’re likely to get down votes
No you get downvoted because people just don’t like you.
this community is toxic. Too many old boomers here. Downvote me now Boomer 😉
Then leave if you don’t like it. Bye bye
The only toxic person I see here is you trying to call people you don’t know boomers which is the most overused word this year. If you have such a problem with this community I’m sure others would be pleased to have you there and I doubt anyone would miss you here.
I saw it on TheDrive but I believe TFL Car also reported it. And yes that’s a remarkable curb weight and undercuts a Turbo S by approx. a couple hundred pounds I believe (3600?)
6000 pounds
Awesome car, a beast. I’m sure GM nailed the performance.
But I wish the design team worked better. It’s not bad, but it’s not good. Well, I say to a supercar…
Chevrolet shows once again it is the flagship division of gm. Always has been, always will be. Such a shame gm hobbles Chevrolet without proper sedans. As much as I like my Impala I would love to see what Tadge Juechter and his group could do with the alpha chassis.
Chevrolet cannot sell enough performance sedans to justify the development cost, not going to happen. The Cadillac sedans are enough.
The Omega platform could’ve been truly great
It did not sell… If you cannot make mode selling the caddy version, the chevy version is a sure loser.
Sometimes I think GM doesn’t give Chevrolet what it deserves. Chevy is always falling behind Ford cause there’s a GMC ou Buick which is intended to be better.
Just how is GM falling behind Ford, and if you think the C8 Z06 is what falling behind is I’d like to see your idea of what Chevrolet could do with a bigger budget?
GM neglects all the brands at times, and some of the products are just hideous, and others like this Z06 fantastic.
There are not enough car enthusiasts outside the circle to create few performance RWD sedans. Anymore, Chevy is an appliance with two performance vehicles. The brand is better off IMO and is doing fine and their customers seem to think so as well while the majority general buying public are not car enthusiast and could care less about the Corvette and Camaro.
That’s because majority of the car buying public need more room then a small 2 seater corvette and a camaro which is only tiny. The camaro is done for 23 it’s gone.
Saw this on another site, this should make those buying the ZO6 happy.
In a General Motors first, every engine will be put on a dyno, run through a 20-minute break-in, then tested to make sure it’s working as advertised before being installed in a new Z06.
That is awesome..
This is what you call, a Ferrari from general motors! 2.6 seconds to 60 is utterly crazy.
For that comment you sir have a 5 day no talking ban it starts now. We will see you Sunday.
What’s a Ferrari?…. 🤣🤣🤣
It sounds like a Ferrari.
Your 5 day no talking ban restarts every time you talk before the time is up. So now we will see you Monday
Zack
Quit joking around, you are making up nothing but nonsense
James I don’t give 2 shyts what you have to say now piss off. I’ll say what I please you don’t like it downvote it and move on.
Hope you are enjoying making up nonsense.
The nonsense is you comparing this to a Ferrari. So I agree with zack you deserve a no talking ban for that one. That was one of the stupidest statements I have ever seen on here.
I am comparing it to a Ferrari because it has a naturally aspirated v8 flat plane crank that sounds like a Ferrari. There direct rivals, gm was also benchmarking the Ferrari 458 Italia. What’s so stupid about it?
James go troll somewhere else you aren’t the website dictator here. You don’t get to control what people say on here so beat it troll. You must be a real jerk to think you have that much power.
James people can say what they please if you don’t like it then start your own website where you can control what people say, but this isn’t your website and you aren’t in charge.
The King clueless Andy Has finally spoken. I hope you enjoyed your days insulting people and calling people !diot.
Get off my nuts tom. I already have 2 kids I don’t want a 3rd go find someone else to get you pregnant.
5 day ban? See you on monday? What in world are you talking about? Grow up a bit.
The guy who trolls people constantly when they say they don’t like something about Cadillac tells someone else to grow up LMAO you can’t make this stuff up.
It’s called facts.
No it’s called your opinion. You get angry when someone says I don’t like the lyriq you call them idiots and all kinds of names. Funny thing you make it out like you designed the car or are an executive at gm but we all know that’s not the case you just stalk this website and YouTube waiting for Cadillac things to pop up.
I am not a big fan of the lyriq myself when it comes to that cheesy grill led thing. I don’t get angry at people who don’t like the lyriq, it’s what they say, for example “oh, Cadillac lyriq will fail like how the elr did” well the facts don’t prove it because the lyriq reservation filled out in 13 minutes so how? I state real facts, I make opinions based on facts.
courious how long these engines last, after 15 years in tuning ls and lt engines i am not overexcited, with a stock lt4 c7 z06 i not manage one round on the Sachsenring racetrack ( only 2.8 mls long) in Germany where iam from without the car going overheated in limpmode, and when i see the vibrations of these flat crank engines (Shelby f.e.) iam curious how GM had getting the job done.
Cosworth designed the LT6 or at minimum helped GM a lot. It should last, pretty well, GM will have software designed to protect the engine. If you tune out the protection, you are on your own.
On the C7 Z06, ya supercharged engines and overheating on the track, are a known issue. I have seen the Supercharged Vette, and Camaro’s overheated, and limping. It’s Lame, and supercharger 101, is you waste so much energy turning the supercharger that is just lost, so the engine has to work so much harder for the net energy produced, thereby generating so much more waste heat.
of course i not speak about outprgramming security meassures (no serious tuner need to do this, especialy not with our high speeds in Germany), dont get me wrong i love the Corvette (i have a 700 hp forged and supercharged C7 Stingray) ,just saw that in the beginning you have to be carefull (at ALL manufacturers),
and i can drive on the Sachsenring as long as i want 😉
Callaway Cars hasresolved the overheating issues on the C7.
Love it! That all Red interior is awesome! The Burnt Orange paint is as well! The widebody does wonders for the C8!
There’s a lot of delusional EV fanboys dislike bombing posts, in here.
Or Ford/Dodge fan bois coming in here solely to downvote lmao
What’s funny is you thinking fans of dodge or ford care enough to come on here to downvote comments about the corvette instead of excepting its gm fans that have a different opinion then you.
Or people that just have different opinions then you and you don’t like it so you try to say oh well you must like ev
This will be an exceptional car by the sound of it. But it won’t stop from here. There will be three more ultra high performance models coming. The Z06 could be the benchmark bar none.
IMO, it would be foolish for GM giving them away under $100K. This car should be low volume somewhat with an asking price of $100K w/ optional Z07 package starting at $120K. Anyone who can afford to get the Stingray can easily can afford the Z06.
Exactly what I said, This car is not going to be cheap. GM may advertise a starting price of $89 or $95K but that is BS, you will never see one built in that configuration. These cars will be $99K to $139K and an amazing value at those prices.
And my dad can whoop your dads ass. Man some of you sound , act , and have the intelligence of elementary school paste eaters. I like corvettes, but only 1 problem, all gm pales in comparison to the no. 1 manufacture FORD. Put that in your chevette and get smoked by a coyote. Ool
Rear end is still ugly.
Still no manual transmission option.
Corvette further losing its identity with an over-head cam engine.
Congratulations to the Corvette team for the great work!
The Z06 with 670HP and 679.29PS (EU-Norm) with the 5.5Litre LT6 has become the best series super sports car. The output per 1st liter displacement is almost identical to that of the special series Porsche 911 GT3. Here I think the LT6 is already great in series production and I think the Corvette team will soon bring an evolution of this engine. Call it Corvette C8 Z06 GT3 with 707HP. I would like to remind you that this Corvette LT6 engine is technically the best production engine. You can only compare with the great BMW M V8 engines from the E39M5, E9xM3 and the BMW M V10 super engine from the E60M5. These BMW M engines had a single throttle valve for each cylinder (8x in the V8) and the response was better than comparable Lamborghini V10 / V12 engines at the time!
The then E-boss Gerd R. was also an eternal fan of these technologically highest quality engines like the Corvette Team today with the LT6 Super engine.
I was hoping to see some different unusual colors for the Z06, like a bright green or a passion purple, but looks like it will be pretty much what they had in 2022 models, it’s great though we may can do combination colors on the interior!
2023 looks wonderful. BUT WHAT IS THE STATUS OF THE 2022 CAMARO I ORDERED ONE 4-8-21 NOT A SINGLE WORD FROM ANYONE
How much over the sticker are you willing to pay this time ? More money than BRAINS !!!
with that motor its time for a new Z/28
Wonder if the modified body lines will carry over to the 2023 Stringray as well.
LOL, a lot of Corvette haters showing up to downvote even innocuous comments with the faintest praise for this best ever Vette…
Haters? So people that have an opinion that is different then yours means they are haters?
Alls I see is people who can’t afford it commenting including you.
After a long wait for the C8 Z06 I am absolutely in love with the results! 670HP is more than expected,although true to form DOHC engines struggle to make the torque that pushrod engines produce.Oh well,460 is still pretty good and it sounds amazing. 8600rpm’s is impressive and should increase track times. Way to go Chevrolet this car is a dream come true for many Corvette fans.
I love the arrest me orange color!
Nobody cares what you love.
Andy I care.
I nailed the torque prediction. I’m super impressed with the power. I honestly didn’t expect them to raise the bar. 13.0 bar BMEP at 26.0 m/s average piston speed. I still doubt it’s only using cam phasing. I can’t wait for the inside look at the engine. They will write books about the LT6…and the starter is in the valley just like the LT5.
Go to Engineering Explained’s YT channel. He has a vid up explaining the engine
Cool you want a cookie?
After arguing for months with GM *authority* claiming 550-600 lb-ft, yes, I want a cookie. Cough it up Alex 🙂
104.25 mm bore and 80 mm stroke. Much different than GMA’s intel of 97x93mm. The LT6 looks like a Yamaha R1 superbike engine (except for the flat plane crank). Lower piston speed, super light parts, double springs (no dropped valves if one breaks). I can see how they got that power, and that it should be reliable.
AWD Easter egg? Driving nanny? Another reason? 11:50ish mark of the video the front wheels spinning at a pretty high rate.
This is a fantastic achievement! Very nice car! Only gripe is with the “flat plane” layout , rest of the engine looks amazing. Why did GM go that route, the sound? As a crankshaft manufacturer I know the flat crank architecture is a real vibrator especially with longer strokes. The 4 counterweight design, as this engine has, makes it even worse. With the correct design, you can make a cross plane V8 that will easily rev past 8500 (see BMW S65) with good torque & without all the vibration drama. Ford gave up on the “Voodoo” flat crank, they even tried different rod pin phasing. We make a lot of flat V8 cranks, all short stroke small displacements which work very well keeping secondary vibration to a minimum.
Sound was not relevant to the flat plane decision; many hours were spent making the sound palatable, whereas a cross-plane V8 naturally produces a beautiful sound. The flat plane decision was based on the enhanced performance potential. Yes, a cross-plane can hit 8,600, too, but it’s not as efficient doing so.
Obviously, a large portion of this engine’s potential is realized in the 4V heads (compared to the LT2’s 2V), but the efficiency at very high RPM is enhanced to another level as a result of the flat plane crank. Because we don’t have a good power curve yet, let’s look at what we do know: The LT6 makes 460 ft lbs at 6,300 rpm, while the LT2 makes 495 hp at 6.450. The 460 ft lbs corresponds to 552 hp. That’s 57 more horsepower, at 150 fewer RPM, from 0.7 liters (about 42 subic inches) less. That’s “why” 4V, OHC, flat plane, and (a lot) of intake tuning.
I really wish someone would not have mentioned the “fish face” on the sides though. Ruins it for me because that is what I see when I look at it now. That needs to change.