I have had one for 2 years- no problems-all goes back to how you take care of it-added another 80 horse-So it goes great especially with 8 speed transmission, better then mazdas 2.5 turbo I had
I really agree that it just adds more complexity will need extra maintenance. Simple concept "If you want some gains you need to compromise for it somewhere else", You cant enjoy both at a given point of time
Maintenance isn't any different on this engine compared to others. Just because something is more complex doesn't mean that it will require any extra maintenance.
@@dkdanis1340Lets drop the maintenance part, But do you think the Germans wouldn't have tried to do something similar. Why did a company like Nissan stop using the Rotary Engines in production, Just give it a thaught on it
12/26/22: Nissan's VC engine has long been the dream of MEs --- theoretical perfection. Unfortunately Nissan chose BOTH power AND economy. As a result this marvelous engine excels at neither but instead is a smooth blend of both. Better to tune it for one or the other and make some headlines. BTW, other manufacturers achieve virtual VC thru variable valve timing and/or variable turbo boost. These are simpler solutions that achieve almost as good results. Retired in Sacto.
Nissan started Variable valve timing in the late 80s and they use the delayed valve timing and the valve overlap. That is nothing like variable compression, your statement lacks understanding. The volume of the cylinder only changes when the piston or the combustion chamber ie moving the valve area closer to the piston ie shaving the head, or changing the stroke of the piston. The compression ratio is determined by the liters the cylinder will hold in the space between the valves and the piston. That’s why a turbo that’s forced air induction is not called a variable cylinder engine, the volume doesn’t change.
Summed it up at the end. The 3mpg better than the competition is not worth the risk of far more failure points on this new technology. I feel the new Altima is still a great car as long as you don't by the VC-Turbo SR version. If you want that kind of power, the options are unfortunately low due to Camry/Accord going to hybrids only with low 200s in HP respectively. However, that should still be plenty of pep for daily driving.
Just bought a 24 Rogue and so far the economy is 34 in mixed driving (75%highway) Now if the dealer had not offered a lifetime warranty, I would have gone either to a Pathfinder with the V6 or to a Toyota
Still love the South African accent. Like, I'm pretty sure I subscribed just because I like listening to you talk so much. Now I need to go watch Chappie...
I feel that a more useful invention would be an engine that has a larger (and possibly variable) expansion stroke, thereby getting more work out of each combustion cycle. The Atkinson cycle is just such an example (James Atkinson - British engineer - 1882, conceived in 3 designs). The piston rod linkages, however, are just as complicated as those in the VC Nissan engine, and need housing in a large cranck case... however, fuel economy would be expected to be much better... why "expected"... hasn't this engine been built in cars and put into practice somewhere? Well, no, because it has relatively low torque, and so the normal "Otto" cycle internal combustion engines have always been favoured... Still, given that fuel savings should at some point in human automotive evolution outweigh sheer power, perhaps Atkinson still has a chance... what do you think?
There is one worrying design flaw in this if the video is realistic. The plain bearings on the control shaft seem to have shell bearings but the shaft only oscillates over a small angle. If this is representative of the actual design hydrodynamic lubrication won't work as it does on the crankshaft. It is to be hoped that Nissan have allowed for this with a big increase in oil pressure to these bearings!
Your right on this one as more moving parts means more that can go wrong and the fuel savings just isn't there. I wish Mazda would bring back the rotary with Ernie Brink's modifications as that mechanic solved all the problems with a rotary engine and Mazda is stuck on class status and refuses to take the man's solutions seriously. th-cam.com/video/C4Epo8C6CwI/w-d-xo.html
The complexity point is of course very valid. However you were comparing a fixed compression ratio engine, which has had lots of time to evolve into its current highly optimized form to a VC engine that has not had that benefit. It will likely never have that benefit either. Currently there is no reason to buy one and without cash flow from that, there is little reason for the manufacturer to invest in it.
I’m sure this has been tried before and failed from over complexity. I’ve had a pushrod 3800 v6 get as much power and around 9l/100km and that was from 90’s technology
I think the engineers have forgotten what a ICE is and how it makes energy to turn the wheels. A ICE is a air heat pump. The more air the More compression more heat equals more energy to turn the wheels. Why would you want to reduce normal operating compression?
@@ChrisVSCars der.. Generally turbo engine are built with a lower compression ratio. What they are doing is adding more spinning weight inside of the engine..just pointless.
You all are missing the point of variable combustion chamber size! Bigger is better for power. Gives the turbo room to do its stuff! And add more fuel. Boom more power. Nissan 3 cyl turbo engine puts out more power than the 4 cyl non turbo engine on same make and model. Also, getting better fuel mileage. It has maybe fewer moving parts. It is minus one piston, rod, valves, and associated parts.
using the term ICE might make you think you are up to date on technology, but you don't understand the operating compression ratio condition preferred under boost.
@hokman1 thermal efficiency . this engine won't improve the combustion process . Which means no improvement in thetmal efficiency. i can prove that because it requires emission control systems to clean up unburnt and / or partially burnt fuel.
I am a Nissan tech and I can say without of doubt these engines are garbage .it's called over engineering. We have dozens of the 3 and 4 cylinders in our shop with knocking and power loss issues with no idea what's wrong or how to fix .we had Nissan engineers here they even took 4 engines back with them . And they were asking us what's the problem .that's when you know it's gonna be a shitshow . No recalls because you can't recall something if you haven't a clue . Good luck if you already bought one
It may be "magical" - but not GOOD magic. They are already becoming notorious for premature failures. Usually one or more of the bearings, often involved with all of the extra crank arms for the variable compression system fail, due to oil starvation. So, the evidence indicates that the engine's internal lubrication system is faulty. In any case, all I can say is that, I would absolutely NOT consider buying a car with such an engine. Not until several years of production - and ONLY if the current reputation is reversed by experience in the field (NOT by some kind of P.R. blitz).
sounds extremely complex, no thanks ill keep my 3.6 v6 with 330 hp, and gets 27 mpg on the highway...this is entirely too complex and will disintegrate after not being cared for correctly..smh, not to mention the Nissan CVTS
wait till they start having issues with them, and no one will know how to fix them....steer clear of Nissan in general, since the 1990s theyve been going downhill
I have had one for 2 years- no problems-all goes back to how you take care of it-added another 80 horse-So it goes great especially with 8 speed transmission, better then mazdas 2.5 turbo I had
Great show. Get well soon 🙂
I really agree that it just adds more complexity will need extra maintenance. Simple concept "If you want some gains you need to compromise for it somewhere else", You cant enjoy both at a given point of time
Maintenance isn't any different on this engine compared to others. Just because something is more complex doesn't mean that it will require any extra maintenance.
@@dkdanis1340Lets drop the maintenance part, But do you think the Germans wouldn't have tried to do something similar. Why did a company like Nissan stop using the Rotary Engines in production, Just give it a thaught on it
Vc turbo rogue with fwd does 30 city 37 hwy. Higher than anyone else especially hyundai/kia and has the most or tied for tq in this class.
Is it reliable?
@@JIMMY-ck1oe who knows. The vc turbo had been out in the altima in 4cy form and jts been reliable.
12/26/22: Nissan's VC engine has long been the dream of MEs --- theoretical perfection. Unfortunately Nissan chose BOTH power AND economy. As a result this marvelous engine excels at neither but instead is a smooth blend of both. Better to tune it for one or the other and make some headlines.
BTW, other manufacturers achieve virtual VC thru variable valve timing and/or variable turbo boost. These are simpler solutions that achieve almost as good results. Retired in Sacto.
Is it reliable?
@@JIMMY-ck1oethere is an investigation of the government agency into failing Nissan VC-turbo engines. Google it for more details.
Nissan started Variable valve timing in the late 80s and they use the delayed valve timing and the valve overlap. That is nothing like variable compression, your statement lacks understanding. The volume of the cylinder only changes when the piston or the combustion chamber ie moving the valve area closer to the piston ie shaving the head, or changing the stroke of the piston. The compression ratio is determined by the liters the cylinder will hold in the space between the valves and the piston. That’s why a turbo that’s forced air induction is not called a variable cylinder engine, the volume doesn’t change.
Summed it up at the end. The 3mpg better than the competition is not worth the risk of far more failure points on this new technology. I feel the new Altima is still a great car as long as you don't by the VC-Turbo SR version. If you want that kind of power, the options are unfortunately low due to Camry/Accord going to hybrids only with low 200s in HP respectively. However, that should still be plenty of pep for daily driving.
Just bought a 24 Rogue and so far the economy is 34 in mixed driving (75%highway)
Now if the dealer had not offered a lifetime warranty, I would have gone either to a Pathfinder with the V6 or to a Toyota
Still love the South African accent. Like, I'm pretty sure I subscribed just because I like listening to you talk so much.
Now I need to go watch Chappie...
Hahah I love that movie😂😂
I feel that a more useful invention would be an engine that has a larger (and possibly variable) expansion stroke, thereby getting more work out of each combustion cycle. The Atkinson cycle is just such an example (James Atkinson - British engineer - 1882, conceived in 3 designs). The piston rod linkages, however, are just as complicated as those in the VC Nissan engine, and need housing in a large cranck case... however, fuel economy would be expected to be much better... why "expected"... hasn't this engine been built in cars and put into practice somewhere? Well, no, because it has relatively low torque, and so the normal "Otto" cycle internal combustion engines have always been favoured... Still, given that fuel savings should at some point in human automotive evolution outweigh sheer power, perhaps Atkinson still has a chance... what do you think?
Our Nissan VC Turbo has been excellent. We have over 2 million miles on our2022 Rogue
2 million miles? They would be a world record
@@resplendentwitticism 2 million miles in 1 year? Bullshit
There is one worrying design flaw in this if the video is realistic. The plain bearings on the control shaft seem to have shell bearings but the shaft only oscillates over a small angle. If this is representative of the actual design hydrodynamic lubrication won't work as it does on the crankshaft. It is to be hoped that Nissan have allowed for this with a big increase in oil pressure to these bearings!
What an absolute nightmare
Your right on this one as more moving parts means more that can go wrong and the fuel savings just isn't there. I wish Mazda would bring back the rotary with Ernie Brink's modifications as that mechanic solved all the problems with a rotary engine and Mazda is stuck on class status and refuses to take the man's solutions seriously. th-cam.com/video/C4Epo8C6CwI/w-d-xo.html
Basically, they need Honda engineers to do their magic on it and only then will it realize its potential.
The complexity point is of course very valid. However you were comparing a fixed compression ratio engine, which has had lots of time to evolve into its current highly optimized form to a VC engine that has not had that benefit. It will likely never have that benefit either. Currently there is no reason to buy one and without cash flow from that, there is little reason for the manufacturer to invest in it.
cool video and engine . But ya is it worth the effort given the added complexity.
I’m sure this has been tried before and failed from over complexity.
I’ve had a pushrod 3800 v6 get as much power and around 9l/100km and that was from 90’s technology
One of the best engines ever the 3.8 pushrod v6 the 2008 grand prix
I think the engineers have forgotten what a ICE is and how it makes energy to turn the wheels. A ICE is a air heat pump. The more air the
More compression more heat equals more energy to turn the wheels. Why would you want to reduce normal operating compression?
When you add boost you need to lower compression unfortunately😂
@@ChrisVSCars der.. Generally turbo engine are built with a lower compression ratio. What they are doing is adding more spinning weight inside of the engine..just pointless.
You all are missing the point of variable combustion chamber size! Bigger is better for power. Gives the turbo room to do its stuff! And add more fuel. Boom more power. Nissan 3 cyl turbo engine puts out more power than the 4 cyl non turbo engine on same make and model. Also, getting better fuel mileage. It has maybe fewer moving parts. It is minus one piston, rod, valves, and associated parts.
using the term ICE might make you think you are up to date on technology, but you don't understand the operating compression ratio condition preferred under boost.
@hokman1 thermal efficiency . this engine won't improve the combustion process . Which means no improvement in thetmal efficiency. i can prove that because it requires emission control systems to clean up unburnt and / or partially burnt fuel.
Ka(car)-Boom!
I am a Nissan tech and I can say without of doubt these engines are garbage .it's called over engineering. We have dozens of the 3 and 4 cylinders in our shop with knocking and power loss issues with no idea what's wrong or how to fix .we had Nissan engineers here they even took 4 engines back with them . And they were asking us what's the problem .that's when you know it's gonna be a shitshow . No recalls because you can't recall something if you haven't a clue . Good luck if you already bought one
work at an auto auction, we are seeing more and more 2023 and 24 Rogues coming thru, with engine issues...just in general Nissans with cvt problems...
@@SuperBooboo02 - And that’s a shame because the Rogue is a comfortable, well rounded CUV …
I thought my 800cc Matiz was a small engine until you said 1 of your (6) cylinders has a capacity of 10cc. 1:49
It may be "magical" - but not GOOD magic. They are already becoming notorious for premature failures. Usually one or more of the bearings, often involved with all of the extra crank arms for the variable compression system fail, due to oil starvation. So, the evidence indicates that the engine's internal lubrication system is faulty.
In any case, all I can say is that, I would absolutely NOT consider buying a car with such an engine. Not until several years of production - and ONLY if the current reputation is reversed by experience in the field (NOT by some kind of P.R. blitz).
But Mazda has this technology though
I'll stick with v8s
sounds extremely complex, no thanks ill keep my 3.6 v6 with 330 hp, and gets 27 mpg on the highway...this is entirely too complex and will disintegrate after not being cared for correctly..smh, not to mention the Nissan CVTS
Not worth the complexity
True😂
wait till they start having issues with them, and no one will know how to fix them....steer clear of Nissan in general, since the 1990s theyve been going downhill
@@ChrisVSCars - Fifty years ago, many felt the same way about OHC engines …
dumbest engine design ive ever seen a couple extra mpg s
irs crap ...