MicroBox:
Maybe the battery terminals are still connected while trying to do the welding

Somorin#1:


You're blaming VW due to your shadetree shenanigans?

Trac:

***********This [however] will be my last technical post on NL. It is time-consuming and not productive. I will be trivial henceforth with minimal interaction. The “thread” should spare me on this. It is a complex question but [I] won't let it off the hook. A disclaimer: it is NOT for everyone. If engineering phenomena disturbs you, do not proceed.

It is impossible to straighten this answer without thermodynamics. As some of us are familiar with, it is a protracted and deductive science.
The comment written contradicts itself. Insomuch that is void of logic. My initial post on this thread has the answer BUT “everyone” condemned that I made the principle complicated. Meanwhile, I had scratched nothing. Those that understood in its entirety need no further explanation. Those without a clue need no explanation.

To answer the first [and only] question:

Torque != Efficiency

That alone renders the whole question as misplaced. Regarding your question and context, I can’t figure the relationship. If you know it, please give me the mathematical expression with the associated principle(s)/law(s) and I will work with that. However, I do know where you are coming from; a perspective fashioned by mainstream media. I will take the extra length to define “constraints” for the purpose of this objective. It will be lengthy but quantifiable in details. Torque by definition is the integration of force in distance (Force * Distance) or mass in acceleration (Mass * Acceleration) and efficiency of a plant has to do with the ratio in work output relative to the heat input of the working fluid.* Efficiency in this discussion is subdivided into three isolated conditions. Thermal efficiency (in a heat engine**) is the fraction of the heat input that is converted to net-work.

The second law of thermodynamics – Claucius: It is not possible to construct a device that operates in a cycle*** and produces no effects besides the transfer of heat from a lower temperature body to a higher temperature body.
The second law of thermodynamics – Planck: It is not possible for any device that is dependent on a cycle to receive heat from a single reservoir and produce a net amount of work.

The definitions have been taken care of and the appropriate laws presented.

No engine or system with a hot exhaust is efficient. None! It is how reversible in process the system is that matters. The internal combustion engine is a closed-system and it is greatly dependent on how reversible**** it is. The less reversible, the more the inefficiency. It has nothing to do with high torque equating efficiency. The turbine is a sub-system. It has nothing to do with the closed-system; for a closed-system does not interact with any of its surroundings besides its immediate surroundings. Any expansive-medium**** that has the addition of heat to it will never exceed the temperature difference in reciprocal to the highest temperature in percentage. That is E = [((Th – Tl) / Th) %]. This is known as the Carnot efficiency. As long as the addition of heat is to the expansive-medium, it will never exceed that efficiency. Furthermore, no heat engine cycle can ever be completed without losing some heat to a lower temperature sink. This is the root to the efficiency and your fuel economy. You want minimal heatloss to increase overall efficiency. The less heatloss, the closer you get to 100%. The maximum theoretical efficiency gotten from a gasoline (spark) engine is 25%. You’ll be lucky if you ever get such efficiency. In similitude, it is as an candidate took an exam and made 18%. That is an epic fail. You’ll be shocked the efficiencies of today’s engines. Things did not get better. Also, the higher the number of cylinders, the less efficient the system will be due to irreversibilities. Irreversible****** processes are higher.

Truth is: mainstream media has not communicated core information. It’s partly because everybody must understand and this is a phenomena that cannot be understood by everyone. As I script this, it’s difficult to express this without going deep plus a lot is omitted. Thermodynamics and Heat-Transfer are sub-genres/disciplines/pillars of Hyper-Physics and it's not shallow.

https://www.youtube.com/watch?v=jJN0B2RIIMI

https://www.youtube.com/watch?v=iYwCNThbFeA

Unimaginable! As sensitive as the matter is, they are NOT getting it correct. There are many more. They are not obligated by law to disclose the core.

Don’t fall for the horsepower-torque misconception. In a partial differential mathematical expression, you can freeze a variable and begin to work on the corresponding variable (torque/economy). I hope you caught my drift there. It is wishful thinking that things will change without a heavy price. There is new technology on the shelf. It’s not coming now. At the moment, a test-run is being conducted; a vehicle has been released to forbid you from servicing your own vehicle. You’ll be breaking copyright laws. If it succeeds, then it becomes the norm [moving-forward]. If not, then something else. It’s a business and they want to remain in it.

That is your answer. The gimmick behind the turbines as a turbocharger is another matter. That requires discussion of intimate motive energy and utility principles of the internal combustion engine and it’s purely scientific; because of “low-level” details. It’s unneeded since efficiency has been defined above. In summary, it’s nothing but flexible air-fuel ratio in conjunction with pulse per ignition cycle (duty load). Hence, the word, ingenuity.

What I have disclosed can be proven by anyone that has sound-knowledge of thermodynamics and they can spot the areas that I have left off (omitted). It is full-proof and cannot be bent. However, due to the nature of the content, it requires application of the knowledge and interaction with people to grasp the totality. It's not possible to compress it all as a post.

Let me leave a caveat: vehicles are not going to be engineered efficient for you. There is no profit in that. That burden is left to you. The offer was presented [somewhere] between the forties and sixties and other interests were chosen. It did not matter because it wasn't about them (the me-generation). Talk to old-men/mechanics - they have a different understanding of what the motor vehicle is. Sincerely, they know more about cars than our generation does.

_{*-------Working fluid is regarded as fuel
**------Cyclic device - an energy converter that uses approximately a fraction of its converted energy e.g. I.C. engine
***-----Temperature differences as it goes high and low. This is known as cyclic processes
****----Processes that can be reversed without leaving a trace to its environment
*****---Fuel as it expands in its surrounding
******--Processes that cannot be reversed
Th - highest temperature of the working fluid
Tl - lowest temperature of the working fluid
Heat-Engine != Internal Combustion Engine - It is a cyclic device. The IC is a heat-engine}

steffans: turbo charged is d kompressor in Benz

ping2ping: Please I see mostly in Volkswagen products having Turbo Charged Engine and I wonder, what exactly is a turbo charged engine?

I notice that turbo charged engines produces higher power that their non turbo engines. For example you will see 1.8L turbo engine producing about 140hp while a 2.0L engine will produce 120hp.

Can the turbo engine be easily fixed by most Nigerian mechanics?

Thanks for all your contributions

austinemar: its very easy to spot a turbo or super charged vehicle. the turbo is usually attached cloz to the engine along the exhaust manifold.... me sef fit work on turbocharger if small fault dey.
now the simplified gist is that turbocharger is just a vehicle modification to boost its efficiency. the ordinary car has to just take in fuel and air which r compressed to achieve the power needed. in the case of turbo charged car, extra air is taken in. the exhaust gas DAT leaves the exhaust manifold is redirected back into the engine via the turbo charger. the exhaust gas strikes the turbo blades therefore making it expand. expanded air is richer in oxygen therefore greater efficiency is the outcome.
op, u will now understand y turbocharged cars r considered to be more efficient.

austinemar: its very easy to spot a turbo or super charged vehicle. the turbo is usually attached cloz to the engine along the exhaust manifold.... me sef fit work on turbocharger if small fault dey.
now the simplified gist is that turbocharger is just a vehicle modification to boost its efficiency. the ordinary car has to just take in fuel and air which r compressed to achieve the power needed. in the case of turbo charged car, extra air is taken in. the exhaust gas DAT leaves

the exhaust manifold is redirected back into the engine via the turbo charger. the exhaust gas strikes the turbo blades therefore making it expand. expanded air is richer in oxygen therefore greater efficiency is the outcome.

op, u will now understand y turbocharged cars r considered to be more efficient.

uduaksun: most engines using turbo does not use spark plug because d compressed air discharge into d combustion is done at very high temperature which causes combustion to take place at interaction with fuel.

Ikenna351:

Am really disappointed with your comment about, especially "how unreliable Peugeot 504 & 505 are". Couldn't imagine such statements could come from you.

How unreliable a Peugeot 504 GL bought brand new in 1976 by my father, is. Simply because it had a failed propeller shaft in 2002/2003, after been driven on Nigerian road for more than 26 years old, still having the original engine. What an irony!

How unreliable my Baby is? Peugeot 505 V6, a 1986 production, that still takes me to any part of the country and brings me back without a cough? Really? How unreliable she is?

Am really disappointed, honestly.

Notwithstanding, why not bring those your Toyotas and Honda to Nigeria and lets see how they will hold up together, after driven hard on Nigerian roads for just a year. Of course, the "Honda Surprise " is not your portion, because your Honda is different from others in Nigeria that have proven how reliable their front swivels can be on Nigerian roads. And may be the ever frequent failing dampers of Toyotas driven on Nigerian road is not your portion, because yours was not produced with balloon like others. Talking about durability!

Back then in the East, the frequent failure of CV joints of Japs made the mechanics to start converting the Japs drive shafts with Renault & Peugeot ones, since the French cars CV joints appeared indestructible. It got to a point, the French cars CV joints and/or drive shafts became scarce commodities in the East back then. And you are here telling me how "unreliable " Peugeots are, compared to your Japs. Wonders shall never end.

Why not ask Peugeot owners in Nigeria how many times they have replaced their front ball joints, CV joints and shock absorbers, of all the long years of ownerships of their Lions? Likewise, ask the Toyota and Honda owners the same and lets find out which of the car brands are so unreliable and not durable.

Next time, however you want to impress Nairaland members of cars you drive, speak of what you know.

Ikenna

Siena:

No spark plugs?? Really? So how is the cylinder charged ignited? We're talking a spark (gasoline) engine, right?

KA24DETT:

The air passes through the intercooler before it goes back to the engine .
Yes . A turbocharged engines is more economical than a high displacement engine with both engine making the same horsepower.

When it comes to Diesel engine properties. Most Diesel engine comes with turbochargers . U have to cram as much air as you can in the cylinder to generate power . Moreover with diesel, very little or no risk for predetonation so u can run turbos with very high PSI.
I don't think they make an NA diesel anymore .. It's more efficient to have a turbo on a diesel

icemann:


I see you are pissed i attacked your "LIONS". I just said my observations and you took it out of context.

I used to be a Honda fan till i read a lot about car companies and i found out these guys are just criminals out to make money.

Have you ever asked your self why
Nissan owns 15% or your darling Renault and Renault owns 45% shares in Nissan?
Toyota owns 10% of Tesla motors?
Ford owns 3% of Mazda?
Fiat owns 58.5% of Chrysler? and so on

Do you know a Voyager 1 a space ship owned by NASA was launched in 1977 to space with 1.903×10^10(10 to power 10) km @-148 degree F temperature and it is still running till today without maintenance but car companies tell us about 250k miles and you need a new engine?

Do you know the cars made by the Russians that are in Russia, Cuba Venezuela etc are still running till today?

Do a little more research online and you would be surprise. Just like drug dealers they make their money from the come back (Parts and accessories)

The question is how do i remedy this scam well i cant, but i can but i can buy a reliable car with a high resale value. My own way of minimizing losses

Do not get me wrong i love cars and i would love to own a lot like Jay Leno and George foreman, but i not a millionaire so i stick to a good economic plan.


And when i said "Every fan is a sucker" i meant most things have at least 2 purpose. A fan blows air and sucks air, and you can say a fan cheers for the team and makes money for the shearholders

pawesome:
Na wa o...dt ws strong
tell me,wt n wt ws suppose to b done before u welding any part f a car apart from removing d ba3 n disconnecting the plugs...is dia ani oda tin?
if dia is,pls I will like to knw
VW products re to swt buh is just d electrical problem dt it gives dts an issue...hia in d north,pple change dia golf4 engines back to dt f golf3 cz f d turbo stuff....meanwhile fans ma question somorin

icemann: I see you enjoy shearing you knowledge in Thermodynamics, but the sad part is less than 20% of the People in car talk understand you(my estimates From UNESCO says less than 13% grads in the world are science majors)

From my knowledge of Thermodynamics and mechanics I would explain each paragraph to everyone here so they can Understand our arguments instead of throwing big formulas and science laws around and that would cause more confusion.

First


He defined torque as momentum in a circle path, and I agree. He also said part of the energy generated in an engine is used. The rest is wasted through heat, friction etc



He explained 2nd law of thermodynamics in 2 different ways. Trust me you don't need to bother yourselves on that




He tried to explain 2nd law of thermodynamics in relation to efficiency of an engine and the percentage of the overall heat generated is used> He said 25% is Used and I don't agree. It is less than that

The Lower heating value of Octane(the major component in gasoline) is 44 mega joules in 1 kg of octane and most V6 produce 200kw at 5000RPM. No need to crack your head its less than 25%


.

He tried to use mathematics to model or will I say explain something I can not understand. It was to opened with too many variables. I cnt help here I am not a math major.



Like I sais Torque is Newton per Meter same as momentum. If you generate more momentum form an engine you can push harder on a gear system and create more speed a lot better than less toque on the same Rotation speed(RPM)

In lay mans terms. If you change to a bigger gear in your bicycle it be come harder to ride because the torque your leg is generating is constant and the bicycle gear is resisting your speed. Now if you increases your energy you will def move faster. Same applies to a car


Lets not make this thing complex.

icemann: The Lower heating value of Octane(the major component in gasoline) is 44 mega joules in 1 kg of octane and most V6 produce 200kw at 5000RPM. No need to crack your head its less than 25%

uduaksun: Pls note that turbo charger is not limited to motor vehicles in its application. It has wider application in automotive engines. It is driven by exhaust gases routed to the turbine side of the turbo. What it does basically is to discharge dry compressed gases(air) into the combustion chamber which in turn mixes with measured quantity of fuel for combustion to take place. most engines using turbo does not use spark plug because d compressed air discharge into d combustion is done at very high temperature which causes combustion to take place at interaction with fuel. This stuff is highly technical. It needs a knowledge of thermodynamics and internal combustion engines.

femi4: Guy calm down, shey na the same Thermo wey I read for school you come made these ambigious? SMH

Somorin#1:


Some of us that are non posers and are autoist to the core appreciates someone that is maintaining a 504/404 instead of buying the latest plastic crap from Korea.

Just saying.

Kudos to Ikenna for sharing his automotive accomplishment. Some of us love reading them and appreciates what is involved in the hobby.

Trac: @YoungBoss,

I'm still upholding my promise. I didn't forget it. It has begun. Bear with me.

Trac:

Interesting!!!

How did you come about this? Where? How?!

Can you p-l-e-a-s-e explain in details what you meant by the above quote. I am [seriously] interested. How did this surface? Is this orthodox or unorthodox? Where did the figures come from? How did you "cook" the final conclusion? What laws did you use? I'm interested in your application of thermodynamics. Where is such "thermo" applied?