₦airaland Forum

0rex: Lol
Do I detect sarcasm here?

0rex: TRAC OFF light can also come on if the TRAC OFF switch is pressed.

jerk: I bought a tokunbo peugeot 307 and it came wt factory 205/50 r16 tyre and i noticed that the movement of the vehicle is nt as smooth as my old golf mk3 wt 185/70 r14 tyre.It doesn't absorb pot holes even the little ones and my shocks are okay confirmed by d mechanic.
My question is that should i migrate to higher profile tyres and reduce the rim size to 15, does high profile tyres makes the vehicle more smooth in driving expecially against bumps and pot holes.?

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?

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

Ikenna351: For anyone to say turbo engine is more economical to run than NA engine is laughable. Sometimes, you guys really need to drop those your books and get practical.

Ikenna351: Back then in Awka, our Peugeot 504 GL propeller shaft failed and also damaged the input spline of the rear differential. While a mechanic was replacing them, a friend came, who was in 400 level, Mechanical Engineering. He pointed at a long pipe and asked me what it was. I told him it was Propeller Shaft. The guy said no, that i was wrong. That it wouldn't be the propeller shaft of the car. I asked why would he say so. He said the drawings of propeller shaft in his books all had fan on one end and bla bla bla. Even when he left, the mechanic who was silent and looked confused all those while the argument was going on asked me " So, is this what they teach you guys in Schools?"
Before, Peugeot turbo engines suffered from cracked cylinder heads, compared to their NA engines. I don't know if the problem has been corrected in their modern turbo engines.
Generally, cost of running turbo engine is higher than that of Naturally Aspirited engine, of the same number of cylinders.
Ikenna.

lomomike: Haaa! Abeg o! I no do Engineering o! Na Urban and Regional Planner i be o! Make una wey dey explain these things take am easy o

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.

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.

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

MANGAM: I got mine in Abuja for 55k a clean one. It depends on the grade but fro 40k to 60k

Onyenna: Don't mind da Mofo...

Onyenna: You know what; go to any tyre shop, bring out all those numbers and see for yourself.......... You know nothing about tyres bro....

You can simply ask the OP if his car is balanced or Not.......

Onyenna: 235-50-18 and 245-50-18 will have same height..the only difference is the width(ie 235 & 245)...255-40-18 will still be of same height but shorter-stomach-area(by the side) and it will probably have the largest width compared to 235 and 245...they all have a difference of 10(width-wise) ie 235,245 and 255...... Summary: they all have same height which means your car is Balanced..... You're not in any Danger sir.....

gbonsalifus: A turbocharged or supercharged engine is more economical than a non turbocharged one. Now, the problem is with the definition of fuel economy and fuel efficiency.
Auto enthusiasts use the two expressions interchangeably but in engineering, there is a little difference. While Economy puts the cost/price of achieving the output into consideration, efficiency only considers the unit ratio of input to output of a particular system like 'fuel' for example. Can't say it all here, I should write about this on my blog soon.
for those who can comprehend, consider a Nissan GTR vs Audi R8. Also, a Bugatti Veyron vs Koenniseg Agera in relation to this topic Efficiency vs economy'.
Chech out 101carsense..com soon for a detailed talk.