GM has always been better then Ford bro just go to any drag strip in any part of the word at any time.

Cool video, I own a 1990 ZR-1, GM insisted on 4.4 inch bore spacing on the LT5 when it was in development. Lotus was owned by GM during this period and Mercury Marine was tapped to machine and hand build these engines. If there ever was a machine capable of breaking the world endurance records set by the 1990 ZR-1, this Z06 may be the machine. I'm a GM guy, but I respect Ford and Dodge as each has some badass machines. As a child of the 70s and 80s, I remember the days when performance died. It's so cool to see what's coming out of Detroit, great days for performance. 👍👍🏁🏁

You coming out like this being a hardcore Ford guy shows character, I'd trust my car at your shop any day....#RESPECT

Im a Nissan Versa guy. but I respect what GM did with the C8 Z06

Great video, I love when intelligence surpasses brand bias. As an LS guy, the coyote excited me in 2011 because I knew it was good which makes the general push harder, when the hellcats came out I was excited again because that pushes Ford and the general to push harder and we get stuff like this LT6, now this engine will continue to push the other 2 and we all keep winning !

Here in Australia, with our V8SC series, they stroked the coyote, Miami here, to 5.4, revs to 7000rpm, can go further, but they had to minimalise the vct as it made too much power, race series is limited to 600hp. They use the vct to match the destroked ls3 (5.7) in both power and torque. The factory coyote is so restricted its not funny. But as you're comparing factory built motors, it does make the GM mind blowing, and proof that push rod really only goes so far, in power production and reliability in the long run. As a Ford guy, and a previous Holden mechanic, I'moving this new 5.5 from GM. Bring it on.

Overhead cam engines where the valve is directly under the camshaft do not alter their valve clearance as quickly as a push road engines does. I checked a Toyota we owned as part of the 100,000 mile service and every single valve clearance was spot on. No shims needs to be adjustes

The LT6 crankcase scavenging design is straight F1 architecture

This would be be an amazing crate engine to put in a kit car

Service department's are going to thrilled about this

GM came out with Northstar series in 1990 something they were all DOHC and ran them for like 20 years. And then the Blackwing engine came out which was also DOHC. So they've definitely had engineers working on the technology for quite some time.

"Who gets these cars just to drive around" As a Corvette owner, I can confidently say 95% of Corvette owners. haha

I think its specifically "the most powerful naturally aspirated v8 ever sold in a car". Chevy also unveiled the 1004hp naturally aspirated zz632 v8 crate engine. However it's 10.35 liters, so it'll take some engineering to swap it into a miata 🥲

The new Z06 seems to be designed for one thing and one thing only, to compete against the European car manufactures in GT racing. The GT 350 on the other hand is designed to compete with the Camaro and Challenger.

I think you hit the nail on the head with the Corvette motor, larger bore, shorter stroke. Does anyone remember the 1969 Camaro Z28? Bore 4 inches, stroke 3 inches. Revved to 6500 plus way back in the day.

Ford made the 7.3 LS copy and Chevy said “hey how’s that 5.2 working out?”

Ford has made some incredible engines but they refuse to put them in a small, light weight, aerodynamic modern chassis at an affordable price.

I have no idea what he was talking about but he's made me want a Z06 a lot more than I ever did

Ive bot watched the entire video but based on title alone. Lets not forget that GM wanted to put a dual overhead cam V8 into the corvette back in the early 90s with the LT5 a motor that was WELL ahead of its time but GM than came out with the LS motor instead for the corvette. Ive talked to a few GM engineers when i worked for GM and a fee stated the LT6 was born amd developed crom the original LT5

As evidenced by Ford’s new 7.3 OHV engines, the OHC vs OHV debate will rage on. This engine is bad ass, either way!

I'm gonna repeat a comment I left on another video about the LT6... Seriously, I'm _amazed_ at what they've done here. An engine that's only 0.3L larger than the Voodoo (5.5L vs 5.2L), revving 'only' 350 rpm higher (8,600 vs 8,250 rpm)...and yet, they managed to pull almost 150 more horsepower out of it (670hp vs 526) and an extra 31 lb-ft of torque (460 lb-ft vs 429). Raising the bar of specific output from 101.87 hp/liter on the Voodoo to 122.6 hp/liter, considering the bore x stroke dimensions for accurate displacement. Sure, Ferrari had a higher number with the 458 Speciale (134.5 hp/liter for a 4.5L V8 reaching 605 hp @ 9,000 rpm), but it's still amazing considering this formula (high-revving flatplane V8) was never done by GM before, while Ferrari has decades of experience. And I think GM did their job right, making an oversquare engine with much shorter stroke (80mm vs 93mm in the Voodoo), so this thing can rev higher and handle those rpm's better too.

Ford guys just don't want to admit that LS has been smacking that ass for 20 years, but apparently now the LT is some crazy thing?

It may be a gamechanger if it becomes more widely available than in a Z06 Corvette. Put it in a Camaro and price it like a Mach I. That’ll kill Mustang sales overnight.

When going over the valvetrain, you seem to have lapsed back into Ford's mass production zone. These are hand built. You should shift your comparisons between Mustang and Corvette to Mustang and Camaro. There is no comparison between the former now.

I like your KZfaq "set" setup. It's a REAL desk setup not a staged one many KZfaqrs have. I think Corvette was diverged to compete with Ferrari, Lambo and McLauren with similar maintenance cost and usage expectations. Camaros being left to compete with Mustangs and other muscle cars. And Yes, I'm expecting to pay insane markup for one. But it's still cheaper than Lambo/Ferrari but with a hardtop for track requirement.

The Z06 sounds like an F1 car 😍

BIG hole short stroke has always been the key to the best power AND FUN>

Imagine if the Ford GT had this engine instead of the Taurus V6.

I remember when Ford stated that the Transfer case (PTU) oil was good for the life of the car on early Ecoboost SHOs. They even doubled down on the claim by casting the case without a drain plug! People cracked into them 4 years later to find the oil had turned into black pine tar sludge the consistency of cake frosting. A lot of folks burned up PTU's as a result.

Ciocca formerly Kerbeck in NJ is selling them at MSRP.

man this new Z06 about to kill the game!

GM first gave us a glimpse of this DOHC 4.2L Twin Turbo technology 2 years ago in the CT6-V Blackwing, and then for real in the Corvette C8.R 5.5L naturally aspirated V8 engine, which is the precursor to this new ZO6 mill. 👍🇺🇸

Mustang has never competed against corvette, lets start there, also this is not the first time GM have done overhead cam, the first ZR1 was DOHC

The bore is larger on the new GM engine but you're going to be disappointed when you realize not only does the flat plane of the LT6 limit it's stroke (more stroke increases the up and down secondary vibrations on a flat plane a lot, it's one of the fundamental limits of the design) but so does the skirted Y block design which is has in common with the Coyote. So far it appears the Coyote is limited to 5.8 liters due to bore spacing and being a Y block. If we removed the flat plane crank on the LT6 and went with cams with a more traditional cross plane crank and firing order, which would sacrifice rpm, you could probably punch this new engine out to a 6.6L or so. It's hard to say because we don't know how much room is in the crankcase for rod swing. It maybe closer to a 6L limit. In any event, a 4 inch bore is kinda what the Modular has always needed but never had as changing the bore spacing might not make it so "modular" anymore at the Ford factory and it hasn't really needed it to say competitive with the larger displacement competitors. I am really curious what the Ford response will be to this engine, especially since Ford doesn't currently have anything directly comparable anymore since the discontinuation of the Voodoo engine along with the GT350.

I love how this ford guy is not trying to take nothing away from all these proud GM owners&funs

I’m an import guy but very excited about this LT6 and the C8 Z06. So much respect for you for showing excitement for this engine even though you’re a Ford guy/channel. Subbed.

100% more brother 2 times x

The LT6 has the same bore spacing as the current gen V LTx, gen III/IV LSX, gen II/I small block. It still maintains the same bore spacing Chevy has had since 1955. Solid finger-follower valvetrains that aren't new. BMW M cars, pretty much all sport and dirt bikes along with plenty of race engines dating back to the 60's have used them. Machinists are already used to grinding valve tips to bring to them into adjustment when necessary. The plenum is a near copy of a 458 Italia intake and functions exactly the same. If you look at the LT6 it has 3 primary timing chains that are centered where the "cam" would be on a LT1. In fact in the cutaways it has a cam in the center of the block that drives the fuel pump and probably functions as a "cam in block" style balance shaft. Generally you only see that in engines that were derived from pushrod design like the Dodge 4.7. It's definitely exotic but not so unobtainium as people think. I'm sure parts will be much more available in a couple years and I wouldn't be surprised if the crankshaft was LTX/LSX compatible.

i loved ford till i met my legendary cousin{within the family cause his nhra history from late 60s and early 70s} and he had all chevy engines in his 1st gen mustangs. he said he sold his ford dealers for toyota in the 90s because how much he had to do warranty work. said hed give me his last 6cyl 64.5 as long as i promised to use a 383 stroker with nx. still sitting in his yard under a lean to next to his paint shop where he keeps his chevy belair draggster im so damn stoked for chevys new tech. i cant wait till crates are 5kish. would totally use one in a late 40s-early 50s buick. and the sound..... good god the roar is incredible

The damn corvette looks like a true super car.

Ford guy here and am actually excited about this new engine for GM. A lot of people who probably cant afford the car are talking smack towards Ford lol. Heck even the old Z06’s are bad ass.

Please show bore/stroke in mm. You also have an international audience 🙂

I seriously doubt that Ford is going to invest in serious upgrades to ICE’s. Even the guys at GM are quietly saying that the LT6 might be that last ICE V8 that they develop.

Awesome stuff Ken I’m a Ford Chevy guy and I can’t wait to get my hands on one of these C8’s. I was shocked at how well the regular C8 worked on the track I can’t imagine how good this thing is going to be.

The valvetrain is supposed to have some sort of diamond coating which is why they say it'll be good for life

Great video. Only complaint is I wiped my screen thinking it was dirty but it was the holes in your wall

The bore and stroke difference is a giveaway. That’s why the LT6 is a revver.

Man, when you leave Team Corvette to do what they want, those guys sure go Medieval. That's a win not only for the GM guys but for any car guy. The LT6 will find its way in the history books.

Never in my life wanted a Corvette until I saw this new Z06

Referring to the solid lifter cam over valve valvetrain design. All turbo Subaru EJ engines have had this same setup with camshafts acting directly on lifter buckets. I've seen many engines go 150K plus miles without the engine coming out for valve clearance adjustment. Usually what happens over time is the exhaust valve clearance will close up over time and the engine will burn a valve. Given how little miles get put on Corvettes, I wouldn't worry about the valve train at all.

I have a friend who is one of the designers and engineers for GM on their Corvette engines. He has been telling me since the early 2000’s that GM was eventually going to make the Corvette a mid engine car and use a flat plain crank. There are also plans to eventually have all of them or an upper echelon Corvette be entirely hand made with top of the line technology and materials, to also include the interiors as well and to where everything can be custom ordered so the Corvettes compete with the Bugatti’s, Lamborghini’s and Ferrari’s. And they will run in the mid 6 figures and start out costing at least $300k to $400k but that is apparently still a ways a way. Maybe in the C-9 or C-10, which also may be called the C-X. And yes, GM is testing several electric motors too. I don’t know all of the specifics but from what my friend has said there would be a very high powered electric motor at each wheel in addition to the engine. But what GM is trying to overcome right now is the issue of weight to power the electric motors and also keep them durable and reliable but my friend told me that the goal is to have a Corvette that will produce over 1,000 HP and Torque and lower RPM’s when combining the supercharged/twin turbo charged V-8 and the electric motors. If they do end up achieving that and releasing that kind of Corvette in the next 10 to 15 years or sooner, that is going to be insane! With these new engines, I am willing to bet that since they are essentially race engines from the factory you will be hard pressed seeing them last over 100k miles or 200k miles. Especially if the Corvette is taken to the track quite frequently. That’s the only draw back with that much stock performance. You can either have excellent performance or excellent reliability. But rarely do you get both!

I love that these engines are putting pressure on the German manufacturers.

I worked for GM for years. Specifically at Powertrain. I can tell you that the assembly process is such that they mount the block to a rolling stand that gets moved from one station to the next every 15 minutes. Every nut and bolt is torqued and checked. As opposed to mass production.

Good video dude, found it 3 months late, but we’ll done

I have a 2012 F150 4wd CC w/ a 3.5L Ecoboost and 151,000 miles on it. I also have a 2021 GMC Sierra X31 with a 5.3L Ecotec and less than 10k miles. The GMC is the most luxurious interior I've had. The wireless phone chargers really sold me. Considering than my F150 is 9 years old, the X31 makes it seem almost 20 years old. The X31 also has the best sound system I've ever heard off a lot. Bose stuff is great. That said, the engine.... the 5.3L Ecotec.... it isn't NEARLY as fast as my 9 yr old EcoBoost with 151k miles. Sure, the 5.3L has 3.31 gears and the 3.5L has 3.55 gears, but the difference in 0-60 mph is 2 car lengths. And.... I can make that EcoBoost get 22mpg under the best circumstances, and a real world average of 19.5 of hwy and 17.2 in town. I rarely drive the X31 in town, but the best mpg I can get on the interstate is about 18.6

Great thorough, informative, and straightforward analysis on both engines. Thanks 🙏

GM has a great "Ad/shortfilm" on the new zo6, think it's on Netflix or another stream. It's worth a watch!

This is the second overhead valve engine you forget the Lotus GM get together . C5 or 6 ? ZR 1.

GM probably calculates the wear in the value trane over time or revolutions. Then use the computer to make the adjusts as to wear over time. Not sure how, but if has Variable Valve advance. Maybe.

Most modern overhead cam motorcycles are solid valvetrain, spin upwards of 12K rpm, and can usually double the valve inspection interval, often not needing it at 40K+ miles. I wouldn't worry about it, modern machining tolerances really are that good.

In regard to driving around normally, the ZO6 will probably still feel quicker than a GT350 because the ZO6 will be geared shorter. Shorter gearing equals more wheel torque and it also gets the engine to higher revs faster. Additionally the DCT will downshift lightning fast and combined with the low rotating mass of the LT6 the driver will be able to get massive instantaneous power on demand. "Normal" driving will as a result be much more dramatic than in a GT350 and much closer to a Ferrari or 911 GT3 experience. Lifetime lash adjustment is nothing new. My 2003 Toyota Matrix had a solid mechanical valvetrain lash never went out of adjustment through 200K miles. Toyota recommended lash adjustment at around 100K miles but when it was measured at even higher mileage it remained well within tolerances. That's without a DLC layer.

When GM says lifetime without valve adjustment I wonder what they consider a lifetime? As an auto technician I attended a few factory classes and on a break asked that question to an engineer who kept saying lifetime this, lifetime that and he said 100,000 miles. After that he said the entire car should be scrapped. I had a good chuckle.

Any concerns about valvetrain just look at the GT3 engine. Similar ethos in both

As the owner of 2 C7 Z06s, they are amazing cars and I’m even more happy now that I’ve had a deposit down for a new C8 Z06 for 9 mos already. I’ll keep my ‘19Z and also have the C8Z. Best of both worlds.

That Z06 is one amazing engine, but I'm surprised you didn't mention the titanium rods and flat plain designed crankshaft that's really light because of much much smaller counter balances. Another factor that's high-tech is its high compression ratio that runs on pump gas and tuned intake runners that take advantage of the different firing order to get the most out of intake air pulses. This is the best of the best racing technology all combined into one, that's why it cost so much.

RPM leads as king, like Indy motors do.

This is a badass engine.

I think Chevy absolutely nailed it with their engine design and placement among it's trim levels. The lt1 makes perfect sense as a larger, more torquey engine for the street and base c8. Then the lt6 for the zo6 that screams racecar and looks to set the zo6 as a thoroughbred supercar. Who knows what the zr1 or zora will be capable of. We could easily see a 1200hp Corvette in the near future. I think turbos could push the lt6 to an extra 230hp if the internals can hold up. So a 900hp LT7 and dual 150hp electric motors up front. 1200hp and the only drawback would be loosing trunk space. Or just delete the back trunk too and add an active aero spoiler like on the Ford GT. Chevy would be playing with the hypercars. They could make that thing start at 160k and it'd still be an insane bargain. It'd be a 918 Spyder for a fraction of the price.

I love mustangs too and have been a Ford guy all my life as well,… but I cannot deny, that new corvette is bad ass

Thank you for saying Engine and not Motor, like some people do.

Iv never seen a gt350 at msrp, every dealer has always had a 30-50k mark up. So ya that changes things

The LT6 craps all over the Voodoo. It’s built from the ground up as a race engine, sharing only the bore spacing of the brilliant small block, whereas the Voodoo is completely based upon and bound by the architectural constraints of the Ford modular architecture.

Only 30 years? Nah they found out real quick in the 60’s that big block “cammer” engines were top of the pac. Then they were banned in racing for being too good. Big problem was most were adapted engines that were originally cam in block so it was never a fresh redesign it really deserved

You might note that the new Ford big block truck engine is pushrod. Horses for courses. OHC makes an engine heavier (more cams in a V type) and that weight is higher up which raises center of gravity. OHC also raise height of head which makes engine both higher and wider. There are good reasons why Chevy and Chrysler are still building pushrod V8s. OTOH, if you wish to have four valves per cylinder that is easier with OHC. But it can also be done with pushrods as in many industrial diesels. It usually makes sense to do OHC for inline engines, still only one cam so you've really added no weight or cost. But for road use in V engines OHC is questionable at times. What we really want is solenoid actuated valves which allow infinite control of timing and lift. Nice idea, but obviously not easy to do.

5:02 they get 110% volumetric efficiency from that intake.... . it may be complex...... but its basically adding ~4 PSI of "boost" on a NA motor and thats BAD ASS

I think people forget gm had the most bad ass 32 valve engine before ford's 32 valve.and it was in a Vette

Porsche had the hydraulic valvetrain in the 991.1 gt3 and it had engine issues then when the rs came out the fixed the issue by lowering rpm to 8800. Then with the 991.2 They switched to a fixed valvetrain the engine issues went away and they were able to bump rmps back to 9k. So maybe Chevy won't have any problems with it. But only time will tell

honestly with a set of cams, a cobra jet manifold on the gt350 and its legit neck to neck with the z06 power wise.

Love the videos, and really like the incite here, but time for a new chair!!! LOL

The price difference between the Z06 and GT350 goes much deeper than the engine. GT350 at its core is a modified mustang, which can be $30k. A Z06 is based on a mid engined corvette. You didn't mention the chassis differences at all

No, you’re not going to get a 6.5L with a flat plane crank. The secondary order of vibration will buzz the bolts out of the engine. For the longest time… the engines were limited to around 4.5L max. The properly named “voodoo” engine was the first time engineers went past that 4.5L barrier… ultimately you don’t get the vibration canceling that nice big counterweights in a cross- plane crank so you either reduce the size and mass of the pistons or reduce the stroke to slow piston speed… the voodoo has a max piston speed of 114mph while the Chevy is really low at 103mph good luck getting a 6.5L to live.

Ford made the motor you describe... the 6.2L SOHC motor in the F250 and the Raptor has a wider bore spacing... with sleeving the block will support some stupid displacements. Famously Roush made their 777 motor, 7.0L, 7000RPM, and 700HP. The heads on the 6.2, even though they are 2V heads, flow more than the Coyote heads. The 6.2L is the sleeper that only Livernois decided to invest in...

The Z06 engine is an amazing feat of engineering. GM has almost always hit the mark with the Corvette, but this Z06 is next level. I can't wait to see the Zr1. I'm hoping for a twin turbo flat plane engine. Let's see an 800+ horsepower mid engine Vette.

2 main points, I think your estimation on torque is over-estimated roughly 30 to 40 lb-ft at the low engine speeds - assuming this engine is capable of the same torque capacity of a 2-valve pushrod engine. This assumes this engine will be better than other 4-valve V8 engines at low speeds. Secondly and more importantly - if you add stroke to either flat plane crankshaft engine, the secondary vibration that is inherent in ALL flat plane crank V8 and 4 cylidner engines will become excessive. Horizontal vibration is inherent with all flat plane crank engines and this is directly affected by the rod length to stroke ratio (R/L) - so if you increase stroke, the rod has to become shorter and vibration is enhanced and then multiplied when you double the rpm. So a small vibration at 4,000 is likely 4x when you double engine speed to 8,000. The bottom line is Chevy did their homework and stretched the stroke and resultant rod length to stroke ratio as far as is possible to minimize (but not eliminate) the vibration. Many years ago Ryan Falconer built a 5.0L 3.00-inch stroke small-block Chevy for Formula 5000 racing and discovered it shook itself apart. He probably put the rod length at 5.7 inches which makes the R/L less than 2.00 on a 3.00 inch stroke which tends to amplify the vibration. So the bottom line is you can't stroke this engine to make more torque - it will shake itself to death. Look up secondary vibration problems with flat plane crankshafts. It's best to avoid modifying the bore/stroke/rod length design orientation in this LT6 engine for many reasons.

The 2.5 liter 4 cylinder in my Kia kicks ass overhead cam naturally aspirated . I watched a video of a f1 engine developer they started with a 3 cylinder engine to get air flow and other things worked out then scaled it up , when an engine fails at 20,000 rpm it’s messy so the 3cylinder engine saves development money

It is awesome they are coming out with another DOHC for the Corvette. The C4 ZR-1 with the LT5 is an example of a DOHC. I see other people have mentioned this. But I decided to reiterate this fact in case people are not aware or forgot.

Being a Ford guy my entire life, I never did GM or Mopar bashing. I want all to be amazing. It just pushes the limits for all of them. I would purchase all 3 and be happy. But still nothing like the sound of Mustang. Very distinctive.

I was hoping you were going to talk about the flat-plane crank. That's a pretty major factor of the new design and how it revs so high.

Pushrod gang. These are fancy, but ohv will put down more average power in the same weight/space. Adding cams/valves adds drivability, fuel economy and high end performance when rules prohibit displacement. Adds weight and takes up too much room under the hood.

The C8 and Z06 sure as hell makes up for the 2019 ZR1.

I think everyone is getting way ahead of themselves. Just wait until you see it. Also it’s safe to say we can’t compare corvette to mustang. Camaro, Mustang, challenger. Vette is swinging at the GT and all of the European supercars. It’s silly to compare these 2 cars

I don't think the GT350 would do very with with the Z06 being able to hook so well with the advantage of engine placement.

Your HP line was spot on line.

we have the C6 6.0 in our UPS trucks, but on propane. the small 500's are fun to drive.

I wish Ford would have done more with the 6.2l. Making it a quad cam 6.2 in a mustang would be pretty darn sweet.

Informative for sure we'll see how that graph plays out. I too have all Fords (F250, ST Explorer) but I have a allocation for a Z06 been on the list for over a year now. I went with the Z06 b/c the GT 500 just didn't do it for me, I wanted the GT but the prices are insane. Pretty stoked about the Z06 though.

General motors will never abandon the 4.4 bore center. It's been in every small block Chevy since 1955

Holy shit huge props to you for a tually knowing and acknowledging the existance of the mark viii

The 5.5 looks like a great engine. Imagine a 12 cylinder version of this...

This makes me happy to see because lately there has been so much talk about electric cars and there eventual take over of the market. Nice work GM for the gas power engines LOVERS. Great video and explanation of engine, well done.