andy50005

http://www.youtube.com/watch?v=Q_ECwEARNDw

why do electric engines have huge torque at low revs but low torque at high, unlike gasoline engines. is it the same for steam engines as well and why>?

Why does torque increase with revs

as the leverage perpendicular to the axis (drive shaft in engine) has not changed. fixed since engine was built.

isnt the leverage distance from the axis determines the torque. how can there be more torque from increase in revolutions rather than (leverage)

Why does torque increase with bhp?

1.Why does torque increase with (B)hp.

2.Also why does it go low just before to p bhp.

1.Just engine output alone torque/bhp without transmission,I always thought it was the distance from the axis (ie shaft to piston) in the engine that determind torque. but that obviously doesnt change as its fixed. only revs can change.

so why then does torque change through revs. i know turbos can change torque curve. so maybe valve inlets during accelaration has a bearing on the gradual torque increase. explain.

2. also torque dips again before top bhp. is this again cos revs are so high that inlets dont leave enough fuel in, but if that was the cause would not bhp also dip down.

please explain both questions if can.

1.Why does torque increase with (B)hp.

2.Also why does it go low just before to p bhp.

1.Just engine output alone torque/bhp without transmission,I always thought it was the distance from the axis (ie shaft to piston) in the engine that determind torque. but that obviously doesnt change as its fixed. only revs can change.

so why then does torque change through revs. i know turbos can change torque curve. so maybe valve inlets during accelaration has a bearing on the gradual torque increase. explain.

2. also torque dips again before top bhp. is this again cos revs are so high that inlets dont leave enough fuel in, but if that was the cause would not bhp also dip down.

please explain both questions if can.

0-60 with torque vs 0-60 with horsepower?

Ok. this is hard to explain but i will try my best.

A car driven to 60mph in two different ways. And driven from 60-80 lets say as well in two different ways. Im not very accurate with figures so bare with me here. Its just examples.

Say a car revs to 7000rpm, Top bhp is 250bhp at 7000rpm,

Top torque is around lets say 215ft/lb at 5500rpm and goes down to 190ft/lb at 7000rpm and anything below 5500rpm reduces as well, say 200ft/lb to 190 and so on

Bearing in mind that 5500rpm could yield around 200bhp. A lot less than the top 250bhp.

My question is using the above as an example. of bhp and torque curve is that

If sprinting to 60 (by redlining usually) is it better than using the torque band, reving to 5500 where top torque is.,now obviously you would have to rev slightly above it to keep the revs in the torque band , so reving to around 6000 before changing up. But also having lower bhp say around 220 instead of the 250bhp at 7000,. Would this be an advantage or disadvange to do this. Or would redlining to top bhp compensate/equilize the loss of torque at top revs so being the same in terms of acceleration .

What is the relationship between these to methods (redling and rev to top torque) in terms of acceleration. Which is better.

That example was from 0-60. Lets say using the same example but now form 60mph to 80mph. Id imagine that torque has a much bigger roll here. (does it?) as at higher gears more torque would be needed to accelerate the faster moving wheels and counteract wind resistance. Therefore would using the torque band here be more beneficial. Or just redling like before to get best bhp. Is top bhp better than top torque in terms of accelaration.

Again what is the relationship between these to methods for accelaration from 60mph to 80mph (redling and rev to top torque) in terms of acceleration. Which is better.

Hope I explained this ok .

Ok. this is hard to explain but i will try my best.

A car driven to 60mph in two different ways. And driven from 60-80 lets say as well in two different ways. Im not very accurate with figures so bare with me here. Its just examples.

Say a car revs to 7000rpm, Top bhp is 250bhp at 7000rpm,

Top torque is around lets say 215ft/lb at 5500rpm and goes down to 190ft/lb at 7000rpm and anything below 5500rpm reduces as well, say 200ft/lb to 190 and so on

Bearing in mind that 5500rpm could yield around 200bhp. A lot less than the top 250bhp.

My question is using the above as an example. of bhp and torque curve is that

If sprinting to 60 (by redlining usually) is it better than using the torque band, reving to 5500 where top torque is.,now obviously you would have to rev slightly above it to keep the revs in the torque band , so reving to around 6000 before changing up. But also having lower bhp say around 220 instead of the 250bhp at 7000,. Would this be an advantage or disadvange to do this. Or would redlining to top bhp compensate/equilize the loss of torque at top revs so being the same in terms of acceleration .

What is the relationship between these to methods (redling and rev to top torque) in terms of acceleration. Which is better.

That example was from 0-60. Lets say using the same example but now form 60mph to 80mph. Id imagine that torque has a much bigger roll here. (does it?) as at higher gears more torque would be needed to accelerate the faster moving wheels and counteract wind resistance. Therefore would using the torque band here be more beneficial. Or just redling like before to get best bhp. Is top bhp better than top torque in terms of accelaration.

Again what is the relationship between these to methods for accelaration from 60mph to 80mph (redling and rev to top torque) in terms of acceleration. Which is better.

Hope I explained this ok .

Did he need to re-lacquer/re cleartop coat...Why didnt he re-lacquer/clear top coat?

When using one of those machine polishers buffer for a car and using a a "Special" abrasive compound (Top Layer of paint and inperfections) remover. (the ones that can cause paint burns if not used with a lot of water!

Does this automatically take off the lacquer aswell? or putting it another way is it the "done thing" to relacquer after this removal of top layer or even more so a very harsh polish.like on vid

Is this normal? I havent done it yet so i dont know.

When i hear of it taking off paint as i saw from a program (inset below (2.50 to 3.50)) it showed the paint on the buffer. the paint came up beautiful. what he didnt say was if the re laquered the car or not.

lacquer is on top of the paint yes? so im guessing when i saw paint on the spounge on the machine polisher, it must have taken off laquer/clear top coat aswell? if so why didnt he spray a clear topcoat or laquer it.

help.

http://www.youtube.com/watch?v=oOU9gm3zMDE

can i use car wax on a buffer or do i "have" to have polish as it is a car polisher buffer. is car polish just another name for car wax?

Did he need to re-lacquer/re cleartop coat...Why didnt he re-lacquer/clear top coat?

Did he need to re-lacquer...Why didnt he re-lacquer?

Would I have to re -Lacquer ?

When using one of those machine polishers for a car and using a a "Special" abrasive compound (Top Layer of paint and inperfections) remover. (the ones that can cause paint burns if not used with a lot of water!

Does this automatically take off the lacquer aswell? or putting it another way is it the "done thing" to relacquer after this removal of top layer or even more so a very harsh polish.like on vid

Is this normal? I havent done it yet so i dont know.

When i hear of it taking off paint as i saw from a program (inset below (2.50 to 3.50)) it showed the paint on the buffer. the paint came up beautiful. what he didnt say was if the re laquered the car or not.

lacquer is on top of the paint yes? so im guessing when i saw paint on the spounge on the machine polisher, it must have taken off laquer/clear top coat aswell? if so why didnt he spray a clear topcoat or laquer it.

help.

http://www.youtube.com/watch?v=oOU9gm3zMDE

when u use the handbrake on this car (with discs all round) how does it work the rear brakes as these are discs like the front. does it use mini drums inside the discs or does it just force the calipers to clamp

in the 92 -96 honda preludes ... what are the standard calipers? 2 pot or 4 pot

when you dyno test a car and get a specific result. then put smaller radius wheels on will it make a difference in the dyno test , i think it would up the bhp slighter as there would be more torque at the wheel cos of the smaller diameter

4 cylinder versus 8 cyclinder equal torque.?

ok this question is a little hard to explain but here goes:

lets say you have a 2 litre 8 cyclinder engine (im not an expert but bear with me.) only examples not real life

lets say each cylinder has 2 units of pressure on shaft ie 2newton meter of torque. so lets say

the torque on the shaft is 16 units 2units x 8 pistons parrallel torque.

how would you equal "that" torque on a 2 litre 4 piston. each piston would move twice further to displace the same amount. but how does that translate to torque. i know there is some formulae for this (the length of the levereage from the shaft to the force appled ... something like that. what length wouls i need to exactly equal the torque of the 8piston

anyone googd a physics or mechanics engineereing

ok this question is a little hard to explain but here goes:

lets say you have a 2 litre 8 cyclinder engine (im not an expert but bear with me.) only examples not real life

lets say each cylinder has 2 units of pressure on shaft ie 2newton meter of torque. so lets say

the torque on the shaft is 16 units 2units x 8 pistons parrallel torque.

how would you equal "that" torque on a 2 litre 4 piston. each piston would move twice further to displace the same amount. but how does that translate to torque. i know there is some formulae for this (the length of the levereage from the shaft to the force appled ... something like that. what length wouls i need to exactly equal the torque of the 8piston

anyone googd a physics or mechanics engineereing

What is the red super car in this ad (perfect for le mans)

http://www.tellyads.com/show_movie.php?filename=TA...

What is the red super car in this ad (perfect for le mans)

http://www.tellyads.com/show_movie.php?filename=TA...

OR

http://www.visit4info.com/advert/Perfect-Everywher...

what film or even a series like "murder she wrote" but still think it was a film around the late 80's early 90's was ac/dc.. you shook me all night long.... used in the film as being played in the background as a "rape" or sexual assault was taking place. investigators used editing technology to dull out the song and start to hear the screams of the victim which won the case because of this. somebody's taperecorder (sound) in the next room happened to record it all. i saw this film years ago. when i hear that song in nightclubs it always reminds me of that chilling scene. would like to know what film it was from.... its not The acussed. could have even been an episode of something?