LT6

[Fastereddie]

Flat-Plane Crank DOHC LT6 to Power the 2023 Corvette Z06! Details and Specs

Chevrolet released details on the DOHC 5.5L LT6 engine that will power the new 2023 Corvette Z06. It revs to 8,600 rpm, churns out 670 hp, is stuffed with innovative tech, and will power the new Corvette C8 Z06 supercar! This is the closest you can get to having a C8.R race engine in you Corvette!

www.motortrend.com

 

[centexk5]

The engine is cool. The sound is cool. The sound in a corvette is wrong.

 

[muddybuddy]

Here is a flat plan 5.3 i believe that was swapped into a c6z. Sounds sweet, but not expecting to come out of a vette.

sounds like the LT6 will be a beast.

 

[ZooMad75]

Pretty rad. Even moreso given queen Mary's edict for electrification.

 

[folkenheath]

To me knowing how engines work, that doesn't sound good, it sounds like two 4 cylinders with no torque.

However, it is a pretty bad@$$ engine, and it would work very well for a road race type car with the light high revving crank.

And with twin throttle bodies factory, it's just perfect for twin turbos.

I still don't like that you need 4 cams to change cams though, even though I sell cams.

 

[ZooMad75]

To me knowing how engines work, that doesn't sound good, it sounds like two 4 cylinders with no torque.

However, it is a pretty bad@$$ engine, and it would work very well for a road race type car with the light high revving crank.

And with twin throttle bodies factory, it's just perfect for twin turbos.

I still don't like that you need 4 cams to change cams though, even though I sell cams.

It's funny you mention changing cams or adding turbskis. I've worked on and driven each version of the Z06's from the 405hp C5, 505hp C6 and the 650hp C7. I have no idea why anybody would screw with a new one to make it even faster. Yes I understand there are people that will, but there is no way you can actually use all the power you got on the street without going to jail.

The C6 Z06 was an animal with the 7.0L and having another 165hp on top of that is pure insanity. It's a completely insane idea to have that much power in a car, same as all the hellcat variants from Dodge. But few will ever push them to the true potential they have.

One of our C7 Z06 customers was actually shocked at the difference to his Z51 C6 and freaked out by it. I strongly urged him to get some instruction from a pro. The local drag strip in Pueblo has a twisty road course off the end of the strip where they do instructional track days. Told him to sign up for a day. To my surprise he did.

He came back the following week with a much better understanding of the limits of the car and his ability. He had a ball really actually pushing the car harder than he could on a public road. But it really showed him how to handle it and with 650hp on tap he's not ever getting it to even 8/10ths on the street.

 

[centexk5]

My charger was 485hp before a few mods and even with sticky tires, anything under 3rd gear was useless and a stomp from anything below 50mph would kick the car sideways, violently at times. I couldn't imagine 650hp in a sports car on the street. I've driven plenty of 6-800hp diesels on the street and those are surprisingly easy to control with that much power. But a car? No thanks. Although I still want one.

 

[ZooMad75]

My charger was 485hp before a few mods and even with sticky tires, anything under 3rd gear was useless and a stomp from anything below 50mph would kick the car sideways, violently at times. I couldn't imagine 650hp in a sports car on the street. I've driven plenty of 6-800hp diesels on the street and those are surprisingly easy to control with that much power. But a car? No thanks. Although I still want one.

That gets to my point. I told this story before but the one an only ZL1 Camaro we got to sell got wrecked in under 24 hours from when we sold it to him. That one was 580hp. Only straight panel on the body was the hood. Folded the driver side wheels under it like doc's Delorean when it slid 50 feet down an embankment to a creek below.

I warned him too. Typical response of any red blooded male, "I know what I'm doing". Ok buddy, have at it. First drive in the car had him bang shifting 3rd at 100mph on the highway past the dealership. Came to work the next morning and the car was wadded up into a ball in my service yard. Talked to the owner the next day and he would not fess up to how fast he was going when he lost it but the level of damage was pretty obvious he was doing 100mph or better.

Point being, without a good understanding of how to handle a high HP car they are actually a danger to themselves and others. There are hundreds of pics over the web of other folks buying hellcats, gt500s, vettes and Camaros wrecked within days of the purchase because they had no clue what to do in it.

 

[folkenheath]

I agree with you on the street. My car just lights them up on on the street, I've done standing tromp on it burnouts (not powerbrake) over 1/8 mile for a charity car show before, with my sticky tires(they were nearing the end of the 2nd season anyway). Trying to use it on the street is not safe nor practical. When I worked for Honeywell at Chrysler there was several Vipers and such that would get wrecked by employees before they were even in production.

However, I'm the guy with over 1000 HP on tap in my car and actually use it at the track too. I've had guys laugh and say, it must be silly to need an NHRA license to drive your own street car you built. (I just had to renew it again actually) It's more of a street/strip or street/track sort of deal with these cars. Drive them on the street and have fun, know the local limits, but take them to the track when you want to drive them hard. Of course there are plenty of videos of people crashing these cars at the track too, at least it's somewhat safer there. Hopefully that's never me.

A future project I would like to build a protouring style 64-65 Chevelle with a procharged LS and take it to Road America. Get that kind of experience too.

I don't like cars I can't drive, or guns I can't shoot.

However, it is impressive they got 670 HP out of an NA pump gas production motor of only 5.5L. But the torque is only 460 at 6300 RPM, it's probably pretty sluggish below 3K or 4K. But I bet they have the gearing to compensate for that. I'd love to drive one. I'd love to drive a Ferrari some day too, its on my bucket list. Along with driving a drag car that has 1 hp/lb with me in it (basically a pro mod).

Normally they take the Corvette engines, and put some derivative of it in the trucks and other cars. I don't see this flat plane DOHC deal working well in a full size truck that also doubles as a light tow rig. I'd rather have the 6.2L L86 I have now in my truck than that thing, sometimes I tow up to 10,000 lbs.

I look forward to seeing what that thing does on the famed Nuremburg track. It has to be impressive and fun to drive.

 

[centexk5]

They’ve been running it already at the Nurburgring. Haven’t seen any numbers yet though.

And to brag a bit, I’ve driven a few Ferraris. One in Modena, Italy at Ferrari. There’s nothing sluggish down low about those cars. Up high is where they shine but they are nearly as impressive down low. The rate of climb on the rpm’s is stupid.

 

[ZooMad75]

I agree with you on the street. My car just lights them up on on the street, I've done standing tromp on it burnouts (not powerbrake) over 1/8 mile for a charity car show before, with my sticky tires(they were nearing the end of the 2nd season anyway). Trying to use it on the street is not safe nor practical. When I worked for Honeywell at Chrysler there was several Vipers and such that would get wrecked by employees before they were even in production.

However, I'm the guy with over 1000 HP on tap in my car and actually use it at the track too. I've had guys laugh and say, it must be silly to need an NHRA license to drive your own street car you built. (I just had to renew it again actually) It's more of a street/strip or street/track sort of deal with these cars. Drive them on the street and have fun, know the local limits, but take them to the track when you want to drive them hard. Of course there are plenty of videos of people crashing these cars at the track too, at least it's somewhat safer there. Hopefully that's never me.

A future project I would like to build a protouring style 64-65 Chevelle with a procharged LS and take it to Road America. Get that kind of experience too.

I don't like cars I can't drive, or guns I can't shoot.

However, it is impressive they got 670 HP out of an NA pump gas production motor of only 5.5L. But the torque is only 460 at 6300 RPM, it's probably pretty sluggish below 3K or 4K. But I bet they have the gearing to compensate for that. I'd love to drive one. I'd love to drive a Ferrari some day too, its on my bucket list. Along with driving a drag car that has 1 hp/lb with me in it (basically a pro mod).

Normally they take the Corvette engines, and put some derivative of it in the trucks and other cars. I don't see this flat plane DOHC deal working well in a full size truck that also doubles as a light tow rig. I'd rather have the 6.2L L86 I have now in my truck than that thing, sometimes I tow up to 10,000 lbs.

I look forward to seeing what that thing does on the famed Nuremburg track. It has to be impressive and fun to drive.

I'm not against the idea of a Z06 or hellcat, but it sure would be smart if the price included a couple of days of driver training at a qualified location using like rides.

Still, I'm betting a very high percentage of these cars are being bought for the investment and will be relegated to garage queen status for life. A small percentage will know how to handle them and the rest are going to "think" they know and end up wiping the car out.

You are in the small percentage that has the talent to build a fast car and got the experience slowly making it faster and faster and really understand how the car functions on the street and track.

Yeah as Ford found OHC engines suck on low end torque in trucks which is exactly why they went pushrod and cloned an LT engine with the 7.3 gasser for the trucks. Until GM is fully electric you'll see the 6.6 gas setting the bar and gaining on power for pulling.

 

[folkenheath]

They’ve been running it already at the Nurburgring. Haven’t seen any numbers yet though.

And to brag a bit, I’ve driven a few Ferraris. One in Modena, Italy at Ferrari. There’s nothing sluggish down low about those cars. Up high is where they shine but they are nearly as impressive down low. The rate of climb on the rpm’s is stupid.

That's awesome you got to drive a Ferrari, that has to be a small percentage of people. And it has to be gearing for the power band. I have read somewhere that the new corvette with have 5.38 rear gears. not sure how true that is, but I can believe it when it spins to 8K. But what will the freeway RPM be? What about the final OD in the trans? Can that thing hold 1500 or 2000 RPM on the freeway?

I'm not against the idea of a Z06 or hellcat, but it sure would be smart if the price included a couple of days of driver training at a qualified location using like rides.

Still, I'm betting a very high percentage of these cars are being bought for the investment and will be relegated to garage queen status for life. A small percentage will know how to handle them and the rest are going to "think" they know and end up wiping the car out.

You are in the small percentage that has the talent to build a fast car and got the experience slowly making it faster and faster and really understand how the car functions on the street and track.

Yeah as Ford found OHC engines suck on low end torque in trucks which is exactly why they went pushrod and cloned an LT engine with the 7.3 gasser for the trucks. Until GM is fully electric you'll see the 6.6 gas setting the bar and gaining on power for pulling.

I think offering a trained track day is a great idea. But I don't think it should be required. They aren't much different than side by sides or jet skis in that aspect. You can buy something that has way more capability than most drivers. The same thing was happening back in the 60s muscle cars, and the 80s with 3 wheelers.

And that 6.6 DI motor is nice, has to be a great truck engine! I just wish they would put it behind the 10 speed or something, not the old 6 speed. Why does the 1/2 ton truck get a better trans than the standard HD trans?