2023 Z06 LT6 Cut Away Interview with Dustin Gardner 

Amen, u said it!!!!

I wish they made it a hot-v like they did the engine in the short lived CT6-V Blackwing. 4.2L DOHC Twin Turbo. 550HP and 640tq.

It seems to me that we are quickly approaching the zenith of the internal combustion engine in real time. Definitely bittersweet but an awesome time to be alive!

@@graphitedak04 very surprised GM spent this much money in engineering going the opposite way of what all the others are going (EV, hybrid, and small turbo engines)

should make up for DOHC Northstar junk pile

Yeah pretty much also considering it’s hard to make TQ on this design they are over achieving so yeah this is sure one heck of an engine.

@@JerryJrsGarage a light car with ultra moder transmissions just don't need low speed torque like a 1970 Buick

@@baby-sharkgto4902 Right which is also why sport bike frame just has an engine hanging there lol. It’s light.

@@JerryJrsGarage Actually, it's because the engine is a stressed part of the frame.

I would expect nothing less than the best from an American manufacturer. This should be the expectation.

This is why the LS6 motor had big holes drilled in the main webs to allow bay to bay breathing.

Offenhauser was doing that in the 60s with wet intake manifolds, my dual port 360 runs circles around everything else

Kind of like the reverse of Expansion Chambers for the 2 stroke engines !?

Tight tolerances.

Racers put a vacuum port on the exhaust to pull a vacuum on the crankcase. But you can get a lot of oil in your exhaust doing that.

That's what this engine design reminds me of.

I looked your engine up a d it’s pretty cool. I didn’t know they made a c4 zr1

I agree! I have a '91 and it sure is a smile per mile.

Have a 92, #500 red/red. Love the car but it eats starters like crazy and the seals for the intake are getting expensive and hard to find.

@@bobolulu7615 those cars are still very fun drivers but very collectable.

Mine was a 71 slant six 225!

Beyond replacing spark plugs, change oil and filter and walnut blasting the intake valves, what would you need to do?

@@machtschnell7452 exactly you don’t need to “work” on these engines that’s the whole point.

#FORVETTE

Thank you!

I spotted that too. Lol

I thought that was him on the wall.

Had to rewind because I got distracted by those at first.

I agree with out Boost ! It must have an exhaust sound to die for !!

Like my son says “, GM make a great engine to put in a not so great car.”

Me too!!!

Me three 👌🏻

Well starting with the major overhaul for 2004 with the LH2 rear drive variant, the Northstar is a good engine. It only took 10 years.

Would add the C4 ZR1 had an OH 4 cam, 32 valve setup and it ran really well with no reliability problems. Designed by Lotus, built by Mercury Marine for Chevy. Can you believe it ?😎

The flaws of Northstars were eliminated with the LC3; at its release, it had the highest HP per liter of any production engine…

This is a motor that shares a lot of its design with an endurance racing motor, something GM knows how to build very well

@Skip R I believe that was the other way around. The production Northstar V8s predate the heavily modified IndyCar design, which itself was adopted later on into the Northstar LMP cars.

The heads are really not that wide compared to other DOHC engines. Voodoo and Coyote heads are significantly wider

Just look into '02-'03 Yamaha r1 engines. What they managed to fit under that little valve cover is amazing.

@@fordmud the engine is quite simple actually. They went full mechanical on alot of things. Having the rotating assembly run in a vaccum is quite a good idea but normally that is reserved for race engines becausr you need air/oil separators in the oiltank

What's crazy is that it still has over a 4" bore spacing which is significantly larger than the Coyote so it can be bored and stroked quite a bit.

@@tommyhallum2054 this engine, unrestricted by emissions will push 800hp at 9000rpm with just a set of cams. Its rpm limited because of the transmission....but if someone does not care about transmission reliability lol

Its not lighter, they said 1kg heavier.

When this thing breaks down it will be one expensive repair bill. A lot of complexity, hopefully its as reliable as the LS engines

Yes, I was at Petersen in mid June and Hetfield's cars are on display there.

Andy Harman: Yup…was thinking same thing. Bet some street racers will figure out how to remove that 8600 rpm fuel limiter so it won’t starve the revs.

there's a female youtuber that twin turbo'd a c-8 with almost no miles on it...there's another video of her inspecting this new z-06, i'm sure she'll be one of the first ones as soon as she can get one

Thanks, Andy. Some commented that I didn't talk back enough. I'd rather keep my mouth shut and let the expert talk. :)

There are always fools out there that think they can know no more then what the engineers know.

@@richardbaumgart2454 She it's merely an ornamental mouthpiece for the guys that do the work and they're not that bright.

Hand built 🤣🤣 The engineer bragged about the robot chosing the valve lash caps for assembly. Lifetime solid valevtrain lash . That is a physical impossibly , roller valevtrain lasts longer but still wears.

@@madmagyver9981 thats my only concern the solid valvetrain, I think thats going to be a problem after a few thousand miles. Its gonna start ticking and without being able to adjust it.

@@Jimmyxsx Do you think they didn't already put a few dozen of these engines through 100,000 miles each on a test stand? That they are going to release these to the public with that oversight and just brush it off?

@@VexChoccyMilk tests don’t always prove accurate, the LS7 had valves dropping into the cylinders lol tests vs real world are two very different things

@@Jimmyxsx LS7 was released 15 years ago

the supercharged 6.2 puts out 200 more ft.lbs. though being only .7l bigger

@@richardbaumgart2454 but how much displacement is the supercharger, because you have to add that displacement to the one from your engine

Thank you!

@Skip R Yes, for sure.... They might have some offset to lessen side-load.

Glad it was helpful!

There's a write up on one of the car magazine sites, I think car and driver or motor trend where they talk about what was done to cope with the vibrations of the engine.

@@RepEvox re: "I'm probably wrong, but the issue with the GT350 engine is block related." indeed, a block negatively affected/effected by vibrations. cast aluminum cracks, that's just what it does (ref CNC billet blocks). though many have failed due to the bottom end letting loose, a few Voodoo engines have failed in this specific way with the rotating assembly still fine.

@@joshuapullins8815 re: "I think car and driver or motor trend where they talk about what was done to cope with the vibrations of the engine." Formula One baby...!!! increase bore size, shorten the stroke. #OVERSQUARE

@@RepEvox re: "I think the point I was making is the weak point was the plasma coating for the cylinder walls." yes i know, but BOTH are issues.

The biggest issues with the Voodoo were the bore to stroke ratio and rod lengths creating insanely high piston speeds, coupled with a crank design that inherently vibrates more than a traditional flat plane design. For a design that is already prone to high levels of vibration, they added more reciprocating mass than you'd normally see in this design. And they made it so the overall forces present during the time the pistons dwell at the top/bottom of the stroke and have to decelerate/accelerate make for a lot of stresses. Couple those higher amounts of primary vibration with higher amounts of secondary vibration, and you essentially have a time bomb. Some improvements did help longevity in the later years. With the LT6, they've gone with the traditional fpc design, and gone with a very oversquared design with a pretty short stroke. Very similar to what was commonly done in the past with Indycar and F1 V8's to help them survive extended periods at extremely high rpms. Plus using connecting rods that probably weight about as much as feather with lightweight forged pistons very similar to what you see in modern Superbikes (these look very similar to the pancake pistons in the Ducati Panigale engines), I don't see excessive vibrations being an issue. Time will only tell though. But I'm sure they've done hundreds of hours of rpm sweep testing on their gimbal dyno.

Glad you enjoyed it!

Thanks, and you're welcome!

Yeah, well he and his colleagues designed it, so ....,

Mr. Moore, $8.59 already in California and it's only 91 octane. I filled up all my street legal bikes today for $3.59, and it's Top Tier 93 octane.

supposedly the special coating i think sounds troublesome to me...time will tell

They already were at their witts end there, it’s been done. Push rod engines can not sustain those power levels for many reasons. Pushrod deflection, coilbind, and valve float all lose power do to the nature of that type of engine. Also, the air scavenging efficiency is much greater with the 4 valves in this DOHC engine than a 2 valve engine, and all done with less displacement.