|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Search | Today's Posts | Mark Forums Read |
|
BMW 3-Series (E90 E92) Forum
>
How does all this torque help?
|
|
04-22-2007, 04:31 AM | #24 |
Banned
14
Rep 1,137
Posts |
From engine's part, it is the integral of the hp curve that determines the acceleration. Torque slows you down since the transmission parts need to be heavier. Weight is performance car's worst enemy. The more curves and less straight line, the more the weight is an issue.
Last edited by bnj; 04-22-2007 at 05:26 AM.. |
Appreciate
0
|
04-22-2007, 06:57 AM | #25 | |
Major General
273
Rep 9,218
Posts |
Quote:
If you work out the torque at the wheels (multiplying by gear ratios and final drive ratio) then you will see that it is massively higher in 1st gear than 5th or 6th. There are several small light vehicles which can accelerate to 60 mph very quickly. They are often powered by high revving engines with relatively low levels of torque. To continue to accelerate as swiftly in the upper gears you need the ability to generate lots of torque at high revs. |
|
Appreciate
0
|
04-22-2007, 12:53 PM | #26 | |
Banned
14
Rep 1,137
Posts |
Quote:
You are kind of right saying that one needs torque at high revs. Torque is power multiplied by time. Thus, you need power x time at high revs (revs is measured as 1/time (revs per time)) -> power x time / time (power multiplied by time divided by time -> power. So torque at high revs is power. Power is defined as how fast the work is done. The work can be e.g. getting car to 100 mph. How fast this work is done (ceteris paribus) depends on the average power during the acceleration. You can't avoid having high torque if you have high power as it is closely related to power. However, average power is the measure affecting the acceleration. Power means performance. Torque is luxory and stress to transmission components. |
|
Appreciate
0
|
04-22-2007, 01:06 PM | #27 | |
Banned
14
Rep 1,137
Posts |
Quote:
However, it is nice to have power also in low/mid range. I.e. it is nice to have high torque figure. |
|
Appreciate
0
|
04-22-2007, 01:37 PM | #28 | ||||
Private
0
Rep 81
Posts |
Quote:
Quote:
Quote:
Quote:
Torque has nothing to do with speed. At high rpms, its the motor's volumetric efficiency; how fast it can fill the cylinders with air and then expell it; that is power. Power is the only thing that will yield the fastest speed. With that said, the speeds at which most people will drive their cars, torque will still dominate. Around 250kph and higher, its all power. AMG motors are much better suited for a street car and the speeds at which a street car will see. BMW motors really shine at high load, high rpms, and high speeds. Its not a matter of respect or power for money; AMG's and BMW M's are just different cars. Unless BMW changes its philosphy, M cars will never beat a Powerful Merc on the streets. Last edited by homerunball; 04-22-2007 at 01:58 PM.. |
||||
Appreciate
0
|
04-22-2007, 02:51 PM | #29 | |
Banned
205
Rep 2,002
Posts |
Stock for Stock...
Check this out, my friend: http://videos.streetfire.net/categor...1D2A2488DA.htm Quote:
__________________
|
|
Appreciate
0
|
04-22-2007, 03:35 PM | #30 | |
Private
6
Rep 95
Posts |
Quote:
|
|
Appreciate
0
|
04-22-2007, 03:40 PM | #31 | |
Banned
119
Rep 2,097
Posts |
Quote:
|
|
Appreciate
0
|
04-22-2007, 07:31 PM | #33 | |
Brigadier General
193
Rep 3,469
Posts |
Quote:
__________________
2016 Alpine White M3 (gone)
2019 Alfa Romeo Guilia (Totaled) 2020 Car-less 😁 (no more) 2020 M340 |
|
Appreciate
0
|
Bookmarks |
Thread Tools | Search this Thread |
|
|