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Exclusive! C8.R Corvette 5.5L DOHC V-8 Pics and How the Flat-Plane Crank Alters Its Iconic Sound

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There’s A New Engine In The C8.R Corvette, And It Sounds Nothing Like Its Predecessor.

They say beauty is in the eye of the beholder, and although that’s true, it can also be in the ear of the listener.

Since the Corvette first hit the streets back in the 1950s, it was imbued with the beautiful and nearly magical sound of V-8 performance. It was a deep, bass-filled rumble that just oozed a feeling of power. Over the years, the sound emanating from Corvettes, both on the street and at the track, had a distinctive note that became synonymous with the car. When the Corvette moved to the LS1 in 1997, the firing order was tweaked a bit, and although the sound did change, it still had that deep rumble that we all love.

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Chevrolet is super secretive of its new mill for the C8.R, so much so that it covered up the back hatch to keep out prying eyes. About all the team will say is that it’s a 5.5L DOHC V-8 fitted with a flat-plane crank. Power numbers are limited to 500 hp and around 475ish lb-ft of twist, but that’s all it will say. In fact this picture is about as close as you’re going to get to seeing the new C8.R engine.

But the only thing constant in the world is change. For the C8.R, Chevrolet Racing really changed things up with its new mid-engine marvel, but it wasn’t the engine placement that ended the car’s iconic sound signature. It was the engine itself. Gone is the deep baritone exhaust note, replaced instead with a high-pitched Ferrari-like sound. Think puberty in reverse. And although we love the sound of a wound-out Ferrari or other Italian supercars, having that pitch emanate from the back of a Corvette is something that will be hard to get used to. We’re not saying the sound is bad—it’s actually pretty badass—but it’s not even close to the sound signature we’ve come to associate with Corvettes.

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The real culprit here isn’t the new 5.5L DOHC V-8 that Chevrolet moved to. Instead, it was the choice to go with a high-revving flat-plane crank. This drastically changed the firing order of the engine and eliminated the classic American V-8 sound that’s typical with the firing sequence of a traditional cross-plane crank. But we know what you’re thinking: “Well, this is just the race car, so I’m going to be able to get my V-8 rumble fix from the production car!” Well, yeah, for now. You see, for Chevrolet Racing to run this new DOHC flat-plane crank mill in the C8.R, it has to, according to the rules, run a similar engine in at least 300 production cars. So does this mean that an eventual C8 Z06 variant will lose its iconic exhaust note?

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Chevrolet Racing tried hard to give race fans a great-sounding engine. And although the new 5.5L engine in the C8.R does have a unique sound, it’s nothing like we’ve grown accustomed to.
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New Corvette Had ‘Reason to Go Back Out’ After Long Delay

Corvette “had reason” to take its No. 4 car back out on track after lengthy repair…

The “tough lessons” of the No. 4 Chevrolet Corvette C8.R’s tumultuous Rolex 24 at Daytona debut gave Corvette Racing confidence going forward with its new car, according to team manager Ben Johnson.

The silver No. 4 Corvette spent eight hours in its garage during the IMSA WeatherTech SportsCar Championship season-opener after a cracked bell housing resulted in an oil leak.

Having pitted at around 11 p.m. the car eventually returned to the track close to 8 a.m. but it still managed to be classified as a finisher, albeit 327 laps behind the GTLM class winner.

While not divulging the extent of the oil leak and associated damage, Johnson explained why the team kept its car in the garage for so long.

“To fix the problem we had to move the engine back,” he told Sportscar365.

“We tried to do it with the engine installed to expedite it but then we realized that if we wanted to get it back on track, we had to take time to take the engine out and put it back in.

“We just took our time to make sure that there was nothing else. At that point, we were no longer in contention, but we had reason to go out and just understand where else the car may have issues.

“It was just kind of a test session after that.

“I think we will go back and disassemble the whole car. We have some issues to address with the oil leak.”

Oliver Gavin, who shared driving duties in the No. 4 with Tommy Milner and Marcel Fassler, said the Corvette crew “wanted to be methodical” about its repairs which added to the length of time it spent in the garage.

The Englishman suggested that the car was starting to show signs of promising pace that it could have taken through the night had the leak not occurred.

“It was really tough on the guys, eight hours of working from midnight until eight in the morning, it was crazy,” Gavin told Sportscar365.

“As soon as that happened, we knew that our day was done and that we wouldn’t be challenging. It was a shame because up to that point, our car had just started to come along.

“It wasn’t super strong right at the start, but we were gaining on it as we went through the race. Could we have been in the mix at the end? Who knows. But there was a lot that we’ve learned from this.

“As a team, we figured a lot of stuff out today. Testing is great but you really see exactly where you are when you come to a race and see where your competition is.

“We’ll take that away and process the data to see how we can make ourselves and the car better for Sebring.”

The No. 3 Corvette fared better than its sister car with Antonio Garcia, Jordan Taylor and Nicky Catsburg bringing home a fourth-place class finish on the lead lap.

Johnson said that this car’s run wasn’t entirely straightforward, but it held up well enough to remain in contention for a podium heading into the final two hours.

“We had a slight clutch issue at one point, but we had fixed it after the first stop that we witnessed it, so it wasn’t a time loss,” he explained.

“But nothing held up that car specifically again.  We were really happy that all the execution, pit stops, driver changes… all things that you don’t get to test in anger until you reach the race, all went super well.”

Johnson added that the Rolex 24 has given the Corvette team confidence ahead of its next race outing at the ‘Super Sebring’ endurance racing double-header weekend in March.

“Coming away from our first race with one car on the lead lap… the issue with the oil leak is obviously very apparent, but when we looked at it we realized it’s a pretty simple fix,” he said.

“I think it raises everyone’s confidence that we can get through some of these early tough lessons and move on to Sebring in a much better spot.”

Source: Daniel Llyod for Sportscar365


Corvette Poised for Sebring WEC Return

#3 Corvette Racing Corvette C8.R, GTLM: Antonio Garcia, Jordan Taylor, Nicky Catsburg

Corvette Racing set for COTA-Sebring double FIA WEC run with C8.R

Corvette Racing looks set to contest the 1000 Miles of Sebring, in what would be the second consecutive FIA World Endurance Championship outing for the new Chevrolet Corvette C8.R.

Sportscar365 has learned that provisional plans are in place to run the Sebring WEC race alongside its two-car factory GT Le Mans class program in the Mobil 1 Twelve Hours of Sebring the following day.

It would come as one of the prerequisites from the ACO, which has stipulated that the Pratt & Miller-run team must run in at least two regular-season WEC races in order to be guaranteed a pair of GTE-Pro entries for the 24 Hours of Le Mans.

The team ran the Shanghai WEC race in 2018 in addition to Sebring last year with its previous-gen Corvette C7.R.

While declining to comment or confirm on any WEC plans beyond its COTA entry, Corvette Racing program manager Doug Fehan said that it’s been their intention to run two regular-season races in the 2019-20 WEC season.

“Right now, that’s the plan but we’re running down a road,” Fehan told Sportscar365.

“We haven’t refined what exactly that plan is going to be. I couldn’t give you every detail and widget.

“We’ve been busy for a couple of years trying to race and design, build and develop the new car. This adds to the challenge of all of that.

“I think most people would understand that we don’t have it completely defined yet.

“It’s a case of dealing it in an orderly fashion.

“We can’t become overwhelmed too much with what’s going on down the road when we have to focus on what we need to accomplish [in Daytona] in a couple of weeks.”

While set to give the new mid-engined GTE contender its competition debut in the Rolex 24 at Daytona later this month, the car’s second race will come just four weeks later at Circuit of The Americas, with a single entry having been submitted for the WEC replacement round.

Fehan said details on that program, including drivers, have yet to be determined.

He explained the reason for doing the additional WEC races is to “try as best we can” to support the globe-trotting championship.

“We understand the value that has to the sanctioning body and the value to the global fan base,” he said.

“We know it’s important but they also know the business side of it that prevents us from doing both things. They get that.

“I think they also appreciate how hard we’re trying to make all of the accommodations we can to keep the ball moving down the field. 

“It’s not easy for us and they know it’s not easy for us and they appreciate that.”

No Issues in 2019 ‘Super Sebring’ Endeavor

Fehan said the team faced no issues in its double-duty endeavor at Sebring last year, in what was only the second-ever time the team raced three cars between two different series on the same weekend. 

In addition to its over-the-wall crew and several other staff, drivers Antonio Garcia, Jan Magnussen and Mike Rockenfeller took part in both Friday’s eight-hour WEC race and the around-the-clock IMSA enduro the day later.

“That worked out great,” Fehan said. “We were lucky because we had enough equipment.

“It’s not like you can piggyback what you have set up. You’ve got to have a completely additional set of stuff.

“Between stuff that we had in stock and stuff that we had for the Cadillac program, we had enough in place.

“That system is getting better and we learned from that on all the things we did right and all the things that we know we could improve upon.”

Source John Dagys; SportsCar365


Most Expensive 2020 Chevy Corvette Convertible Costs $113,955

Configurator with pricing info is up, so we’ve decided to max it out.

We’ve been periodically checking Chevy’s website for the Corvette C8 Convertible configurator ever since it went up at the beginning of October to see if there’s pricing available. You can finally know how much the desired spec is going to set you back as the configurator now has all the pricing details included. Much like we did with the coupe a few weeks ago, we’ve decided to max out the online builder in an attempt to find out how much a fully loaded Stingray Convertible costs.

We’re not going to go through each and every option as we did in the previous post because most of them are identical. It’s worth pointing out the convertible commands a $7,500 premium over the coupe and it starts at $67,495 for the entry-level 1LT. Go for the better-equipped 3LT and the price jumps to $78,945, and then you can add this $995 Long Beach Red Metallic Tintcoat paint and a dual racing stripe also priced at $995.

The most expensive options available for the C8 Convertible are the $5,000 Z51 Performance Package and the $4,850 Grounds Effect Kit, but on top of these, you can also add the $2,095 grille insert and $1,145 side mirror caps both finished in visible carbon fiber. Another pricey option is the $2,695 wheel set measuring 19 inches up front and 20 inches at the rear, with a five-spoke design and a Performance Pewter-painted finish.

If you truly want to go all out with the configurator, Chevy will be more than happy to provide you with a two-piece leather travel bag set for $1,450 as well as indoor and outdoor car covers each priced at $460. Inside, a carbon fiber trim adds $1,500 to the final bill, while the Competition Sport bucket seats are an additional $500.

With all the boxes ticked, you’re going to end up with a 2020 Corvette Stingray Convertible that costs $113,955, plus an additional $110 worth of dealer-installed

As you’re probably aware by now, production of the C8 has been delayed until February 2020, so it’s going to be a long wait to park the new Corvette in your garage.

Hit the source link below to play with the configurator and see if you can beat our price.

Hit the source link below to play with the configurator and see if you can beat our price.

Original source: Adrian Padeanu; Motor1


FAMILY OF STEVEN HOLCOMB RECEIVES OLYMPIC SILVER MEDALS IN HIS HONOUR

Late USA driver in two-man and four-man bobsleigh teams upgraded from bronze at Sochi 2014 after disqualification of Russian medallists

Two and a half years after his untimely death, the family of bobsleigh driver Steven Holcomb will receive two silver medals from Sochi 2014.

Holcomb piloted the USA two-man and four-man bob teams which finished third at the Games.

But they were promoted to silver in both events after Alexandr Zubkov, the driver of Russia’s original four-man and two-man gold medal sleds, was disqualified for doping offences with brakeman Alexey Voevoda also subsequently excluded.

Holcomb, who led his country to its first four-man title in 62 years at Vancouver 2010, died in his sleep at the Olympic training centre in Lake Placid in May 2017 aged 37.

Steven Langton, brakeman in the two-man and a pusher in the four-man, are also set to receive two silver medals at Tuesday’s Team USA Awards in Los Angeles with pushers Chris Fogt and Curt Tomasevicz collecting four-man silvers.

USA’s greatest bobsledder of his generation

A native of Park City, Utah, Holcomb started out as a ski racer before switching to sliding in his late teens.

He was originally a pusher and was part of Brian Shimer’s team ahead of the 2002 Games in his hometown of Salt Lake City before a hamstring injury at the worst time saw him replaced by Dan Steele.

Holcomb then switched to driving but there was a problem – his eyesight.

After laser surgery in 2000 had failed to make a difference, he was diagnosed with the incurable degenerative eye disease keratoconus which leads to the thinning of the cornea.

Deciding not to tell anyone, Holcomb wore hard contact lenses and ahead of Turin 2006 found that his sight was getting progressively worse to the point that he thought he could go blind.

In his autobiography, ‘But Now I See: My Journey From Blindness to Olympic Gold’, Holcomb admitted he should have said something sooner but that “because the only lengthy conversations I’d had about my disease had been with myself, I always came up with the most horrific scenarios for what would happen if I confessed now”.

Having managed to pass a vision test for international competition by memorising the letters on the eye chart, he took sixth place in the four-man bob and 14th in the two-man in his first Olympic Games.

But his eyesight soon deteriorated to the point that contact lenses were not up to the task making cornea transplants in both eyes, and four years out of the bob, the only feasible course of action.

Faced with that prospect, Holcomb’s already fragile mental health worsened and he attempted suicide by taking multiple sleeping pills washed down with bourbon whiskey.

Incredibly, he survived and decided to come clean about his sight issues.

His team-mates and coaches set to work and put him in touch with Calfornia doctor Brian Boxer Wachler who fitted special implants in 2008 which improved his vision markedly without surgery.

The procedure soon became known as the Holcomb C3-R.

Holcomb was able to return to the circuit and became world champion a year later at Lake Placid before securing his greatest triumph at the Vancouver Games of 2010, piloting the ‘Night Train’ – with pushers Tomasevicz, Justin Olsen and Steve Mesler – to gold.

Popular with his team-mates and bobsleigh crowds for his outgoing manner, and his ‘Holcy Shuffle’ dance, Holcomb built on his Olympic title with three golds at the 2012 Lake Placid World Championships – two-man, four-man and mixed team.

USA retained that mixed team title a year later before Holcomb headed to Sochi for his third Games.

Bronze medals in both the four-man and two-man saw Holcomb join Pat Martin as his nation’s most decorated Olympic bobsledder.

The next couple of seasons were not quite as successful, although Holcomb was ranked second in the 2016-17 two-man World Cup standings thanks in part to a victory over Canada’s subsequent PyeongChang 2018 two-man gold medallist Justin Kripps at Lake Placid.

He was still on course to pilot a Team USA sled at PyeongChang but in May 2017 his best friend, world champion skeleton racer Katie Uhlaender, broke into his room at the training centre in Lake Placid having not heard from him for two days and discovered his body.

Holcomb was later found to have alcohol and prescription sleeping tablets in his system having appeared to have passed away in his sleep.

His 60 World Cup, 10 World Championship and three Olympic medals made him one of the most decorated drivers in the sport’s history.

Medal reallocation from Sochi 2014

Six months after Holcomb’s death, Zubkov was stripped of his medals from Sochi 2014 for doping offences.

And in March this year, following the application of the Olympic Medal Reallocation Principles, the teams below Russia were promoted with Holcomb’s two-man and four-man teams upgraded to silver.

Langton, Tomasevicz and Fogt released a statement at the time saying, “It’s unfortunate that our results were not official in February of 2014 and that we’ve had to endure the long process to see justice finally served.

“We are happy that we now can celebrate and be proud of the silver medal accomplishments.”

Latvia’s four-man team, piloted by Oskars Melbardis, were upgraded to the nation’s first ever Winter Olympic gold medal with John Jackson’s Great Britain sled promoted from fifth to third with Russia 2 also disqualified for doping having been originally fourth.

Jackson said, “Disappointingly, it is a medal we should have received on an Olympic podium in 2014. Cheats have cost us that moment, along with other nations too.”

In the two-man, Switzerland’s Beat Hefti and Alex Baumann were awarded gold with Melbardis and Daumants Dreiskens taking bronze after Russia 2 were also excluded for doping.


How the C8 Corvette’s Dual-Clutch Has Changed Since We Drove the Car

The new Corvette has an eight-speed Tremec DCT. We weren’t crazy about it in the pre-production C8 we drove, but engineers tell us the final version will be better.

For the C8 Corvette, Chevrolet abandoned the traditional manual and torque-converter automatic for a new, eight-speed Tremec dual-clutch. And in our Performance Car of the Year testing, the gearbox was the weakest component in the pre-production C8 Stingray we had on hand. It’s part of why the Corvette didn’t win.

In automatic mode, the DCT dolled out nice, snappy shifts, but when using the paddles, it could be clumsy. Too often we found ourselves running into the rev limiter, or having downshifts denied after a paddle pull. But, the C8 we drove wasn’t a finished product. There’s been development work since we drove the car, and that work will continue for the foreseeable future. At a powertrain engineering seminar held by Chevy last week, we asked Glen Hoeflinn, controls program manager for the DCT, what will change from the car we drove.

“Maybe you get some humpy-bumpy shifts here, you get a little bit of that there. That all gets refined out,” Hoeflinn said. “It’s in final refinement, and then it’s in final checks and looking what we’re doing and making sure that it’s behaving exactly [how] we want.”

“That’s what we’ve done since the car that you had. Doing all that refinement and making sure it’s ready to go for everybody across the all the cars.”

A dual-clutch presents unique challenges, no matter what sort of car it’s in. “There’s a lot of pre-selection interaction that goes on in the background,” Hoeflinn said. “It’s the same choreography” between the engine and transmission, he added, but without the “luxury” of a torque converter, there’s a lot more programming work involved.

As you’d expect, the transmission has different automatic shift strategies for the various drive modes, which adapt in real time. The more aggressive, the more spirited you drive, the more aggressive the car’s going to respond,” Hoeflinn said. “As you start to relax, the car’s going to start to relax.”

The DCT uses latitudinal and longitudinal accelerometers, and looks at information like throttle position and steering angle to gauge how the car is being driven, and react accordingly. For example, in Track mode with the transmission set to automatic, the car will downshift aggressively when the driver is braking hard into a corner, and hold upshifts until corner exit.

The C8 has two manual modes. If you pull a paddle while in Drive, you get a temporary manual mode, which automatically times out, or can be exited sooner by holding the upshift paddle. In this mode, the car will automatically upshift at redline. If you press the M button in the center console, you get full manual mode. There’s no time out, and the car won’t upshift at redline.

There are two other neat tricks available for drivers to exploit. First, if you hold the downshift paddle, the DCT will serve up the lowest possible gear. Do that while braking, and the transmission will keep downshifting as engine speed allows. And second, pulling both paddles at the same time is equivalent to pushing in the clutch pedal on a manual car, which allows you to rev the C8’s new V-8 as much as you want.

In the C8, the paddles are directly wired to the transmission control module (TCM) for quicker response times. “In other applications, from the paddle, the wire will go to the body control module and then from the body control module back over to the transmission. You have obvious latency there,” Hoeflinn said.

“It could be 25, 30, 40 milliseconds from the time you pull, to the time that transmission actually got the message. When you wire them directly from the paddle straight to the TCM, we’re getting the message instantaneously.” This doesn’t mean the paddles will give you a downshift that over-revs the engine—the TCM prevents that—it just helps reduce delay.

One of the headline figures of the C8 Corvette is its incredible acceleration. We timed a pre-production Z51 Stingray as hitting 60 mph in 2.8 seconds and running the quarter-mile in 11.2 seconds at 122 mph. With the C8’s Performance Launch mode, the car will actually use the inertia of the engine coming down between revs to propel the car forward. Chevy calls these “Boosted Shifts,” and they’re only used with a Performance Launch. In any other mode, they make the car feel unsettled.

From a mechanical standpoint, this new Tremec transaxle isn’t a radical departure from other DCTs. There are concentric clutches and input shafts for the odd and even gears. The even gears and reverse live near the front of the transmission, while the odds are at the back. A limited slip-differential is integrated within the unit. Base Stingrays get a mechanical diff with a 4.89:1 final drive ratio while Z51-pack cars get an electronic LSD with a 5.17:1 ratio. The overall gear ratio spread of 8.8:1 is the same regardless of differential.

The packaging of the transaxle is such that there’s a common oil sump—filled with 11 liters of Pentosin FFL-4 fluid—for all components. A cooler mounted to the top of the transaxle assembly means there’s no need for additional hydraulic lines, while two filters keep things clean. An externally mounted pressure-side filter requires replacement every 20,000 miles, while the internal suction filter mounted to the sump is a lifetime part.

We asked about why the C8 team didn’t try to do a manual. Hoeflinn and the other engineers present gave us a similar answer to Corvette chief engineer Tadge Juechter, when we interviewed him before the car debuted. They’d need to develop a new manual just for the C8, and considering the stick-shift market is shrinking, it would be an expensive endeavor seemingly without much reward. There are packaging constraints with the Corvette’s central backbone tunnel, too, which would require a hole to accommodate the shifter and gear linkage, hurting structural rigidity. Juechter also said the pedalbox would be cramped with a clutch.

Our first experience with this DCT was less than positive, but this is a gearbox that shows a lot of promise. We look forward to driving the finished product.

Originally written by Chris Perkins; Road&Track


MAE Hall of Fame at NC State Inductee, Hans deBot

Hans deBot, a local businessman and entrepreneur, was inducted into the Mechanical and Aerospace Engineering (MAE) Hall of Fame at NC State University on November 1, 2013. He was nominated for this honor by his colleagues and was selected by the faculty and Dean of the MAE Department at NC State.
See full article @ http://www.debotech.com :

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