High Rev or Low Rev? :106:

[Iylia H]

So here goes, been googling for it, and still, I couldn't get the answer for it.What do you guys think?;-is achieving Max torque at low rpm better or Max torque at high rpm better?and-is achieving Max horsepower at low rpm better or Max horsepower at high rpm better?

 

[Jamesc]

So here goes, been googling for it, and still, I couldn't get the answer for it.
What do you guys think?;

-is achieving Max torque at low rpm better or Max torque at high rpm better?

and

-is achieving Max horsepower at low rpm better or Max horsepower at high rpm better?

sorry for asking, this Q is for what purpose?

 

[Iylia H]

been having this conversation with my pals.. till now, we couldn't get a definite result. Hope there'll be someone here who would share some lights for this question

 

[Jamesc]

been having this conversation with my pals.. till now, we couldn't get a definite result. Hope there'll be someone here who would share some lights for this question

put it simple. torque achieve by the stroke of the engine movement to push the car moving, the higher it is the lighter the car will go (pick up) and only on the early rpms. once the torque reaches it peak it will drop significantly then the horsepower come in n push the engine to its limit and that's the top end.(high speed)

so what u asking i don't really understand, both thing increase simultaneously, the firgures will depends what kinds of engine u playing with.....:smokin:

 

[jackyhung]

bro, u need to know the difference between horsepower and torque..is totally 2 different output..
but commonly i think torque is better to have in low revs because u need that torque to overtake a lorry for instance without changing gear to rev the engine..
while horses to have in high revs to give u the neck breaking experience..

 

[mizhan]

even simpler put.. torque is like your body muscle stength, horsepower is how fast you can run.

 

[astroboy]

Horsepower gives u the ability to move the car, torque give u the ability to fight load or when climbing.

Short stroke engine give more horsepower while longer stroke engine give u more torque, provided compression ratio is the same. Lighten flywheel sacrifices torque but increase on-wheel horsepower but when go uphill, speed drop fast, ever though pickup improve on level road. Different engine characteristic.

Toyota engine longer stroke, smaller cylinder bore, Honda engine is vice versa. BMW engine stroke is even longer than an average Toyota..

Horsepower good for sprint, torque win races! :rock:

 

[Iylia H]

as a matter of fact, yes i do know the difference between torque and horsepower.

well guys, sorry if i get you all confused, because i am too confused here.But not with the "what is the difference between torque and horsepower". It's just I need to know, which set up is the best for a car to go fast and at the same time be competitive. there i've made it specific.


so after deducing the replies can i put it this way?;

-Achieving highest torque at low revs will give you a faster acceleration than to achieving highest torque at higher revs

and

-The higher the revs go, as long as the horsepower is increasing with the revs.. will give you a higher top speed.



Oh please, correct me if im wrong. and please do tell me if im starting not to make sense

 

[erica34]

...It's just I need to know, which set up is the best for a car to go fast and at the same time be competitive. there i've made it specific.

from the word 'competitive', i presume question is related to some form of racing? depends on the type of race i guess. they're all about going fast but different kind of fast. drag racing, top speed challenges, circuit racing, illegal street racing...

perhaps you can find the answer you're looking for here... too deep for me.
http://vettenet.org/torquehp.html

 

[t2ribena]

to achieve the max torque at lowest engine speed is preferable but this max torque should stay on constant thru all the engine speed...thats why the term flat torque curve...to have this as close as possible to flat torque curve, engineers adopt the VANOS & Valvetronic technology to varies the engine characteristics constantly to acheive this torque curve.

for horsepower aka the amount of work the engine can do for a NA car is always achieve at high rpm...same thing to achieve it earlier is better coz no need to rev until 8k rpm only u get the max hp so to achieve this they use FI...