| Vancouver Auto Chat 2016 VAC Community Head Moderator: Raid3n |
 | | 
07-03-2010, 03:18 PM
|
#1 | | '
Join Date: Apr 2010 Location: Vancouver
Posts: 4,664
Thanked 6,557 Times in 1,111 Posts
Failed 797 Times in 212 Posts
| How weight makes a difference in cars.
Hello im a noob. Can you guys teach me how Weight makes a big difference in performance? For example i know that the exige is a really light car with only a Corolla engine and it has pretty kick ass performance. and its pretty common sense. but can anyone explain in depth? D:
*flame suit on for being a noob*
| 
|  | |
07-03-2010, 03:26 PM
|
#2 | | look at these diamonds, they shining
Join Date: Apr 2008 Location: Vancouver
Posts: 2,800
Thanked 1,813 Times in 553 Posts
Failed 634 Times in 127 Posts
|
think about it this way:
you holding a bottle of water will run faster than the world's fastest runner carrying a fat chick on his back
| |
| | |
07-03-2010, 04:07 PM
|
#3 | | Rs has made me the woman i am today!
Join Date: Mar 2010 Location: PM
Posts: 4,477
Thanked 3,341 Times in 842 Posts
Failed 207 Times in 86 Posts
|
Power to weight ratio.
| |
| | |
07-03-2010, 05:02 PM
|
#4 | | bye bye REVscene
Join Date: May 2005 Location: `
Posts: 2,445
Thanked 272 Times in 72 Posts
Failed 119 Times in 18 Posts
| Quote:
Originally Posted by Jgresch  Power to weight ratio. | this
| |
| | |
07-03-2010, 05:19 PM
|
#5 | | I answer every Emotion with an emoticon
Join Date: Feb 2005 Location: somewhere
Posts: 7,906
Thanked 2,485 Times in 1,007 Posts
Failed 1,234 Times in 307 Posts
| Quote:
Originally Posted by Funktion For example i know that the exige is a really light car with only a Corolla engine | i think they have the Celica engine.. dont they?
| |
| | |
07-03-2010, 05:48 PM
|
#6 | | racing & tech mod.
Join Date: May 2004 Location: Vancouver
Posts: 4,034
Thanked 507 Times in 188 Posts
Failed 22 Times in 12 Posts
|
It's not just about the power to weight ratio. If you have a 3500lbs car rolling down the highway, it takes a certain amount of force to make it stop, turn, or accellerate. If your car is only 2500lbs, it will be 'more willing' to change direction than a 3500lbs car. Lighter = more nimble in every way.
However, power is still very important, because weight does not affect your top speed - it only affects how quickly you get to the top speed. Aero, Horsepower, and Gearing are what determine your top speed. Those little lotuses are quick bastards around small and tight tracks, but a heavier car with significantly more power can be faster at the big long tracks!
| |
| | |
07-03-2010, 07:22 PM
|
#7 | | Resident Bullshitter
Join Date: Mar 2008 Location: Hong Kong
Posts: 2,209
Thanked 298 Times in 152 Posts
Failed 1,140 Times in 246 Posts
|
why don't you pay attention in physics class?
| |
| | | This post FAILED by: | 1exotic, Dentz, ds226, Fi2e, GabAlmighty, Graeme S, Gumby, insomniac, invader, jmanhas, Kim Jong Un, mb_, monkeywrench, nack, Onassis, originalhypa, pronator, rawr, shenmecar, smk | |
07-03-2010, 07:25 PM
|
#8 | | Rs has made me the man i am today!
Join Date: Jan 2005 Location: Vancouver
Posts: 3,144
Thanked 1,843 Times in 553 Posts
Failed 185 Times in 67 Posts
| Quote:
Originally Posted by .Renn.Sport why don't you pay attention in physics class? | Why don't you go die in a car fire?
__________________
nns | |
| | | This post thanked by: | 1exotic, CKLCKL, Dentz, distanc3, ds226, GabAlmighty, Graeme S, Gumby, hk20000, iamon, insomniac, invader, J-Chow, jmanhas, Kim Jong Un, monkeywrench, Mugen EvOlutioN, nack, Onassis, penner2k, pronator, rawr, StealthFighter, TOPEC | |
07-03-2010, 07:29 PM
|
#9 | | WUB WUB WUB WUB WUB
Join Date: Oct 2007 Location: Surrey
Posts: 7,857
Thanked 7,085 Times in 1,923 Posts
Failed 202 Times in 90 Posts
|
^lol
__________________ FEEDBACK (9-0-0)
SPOTTED Quote:
Originally Posted by slowguy fuck you hipster | Quote:
Originally Posted by trollguy then fuck you hipster akinari | Quote: |
[23-05, 11:34] FastAnna suck a dick ygay
| | |
| | |
07-03-2010, 07:30 PM
|
#10 | | HELP ME PLS!!!
Join Date: Sep 2008 Location: Burnaby
Posts: 5,541
Thanked 1,109 Times in 299 Posts
Failed 192 Times in 41 Posts
|
A fat chick in your car may cause your car to gain 300lbs and scrape; all that work you've done to corner balance your car will also go to waste.
Now that's a difference.
| |
| | |
07-03-2010, 07:33 PM
|
#11 | | My homepage has been set to RS
Join Date: Aug 2008 Location: Vancouver
Posts: 2,194
Thanked 678 Times in 165 Posts
Failed 107 Times in 27 Posts
|
common sense dude.
__________________
95 325IS - alt dd
93 Legacy - winter beater
93 Loyale - sold
92 240sx - dd/project car
88 CRX - sold
98 DC2 - sold
Renting out pbm fender roller - pm for details.
| |
| | |
07-03-2010, 08:15 PM
|
#12 | | '
Join Date: Apr 2010 Location: Vancouver
Posts: 4,664
Thanked 6,557 Times in 1,111 Posts
Failed 797 Times in 212 Posts
| Quote:
Originally Posted by satek common sense dude. |  thats what i wrote in the op
| |
| | |
07-03-2010, 08:23 PM
|
#13 | | I *heart* Revscene.net very Muchie
Join Date: Jul 2007 Location: BC
Posts: 3,558
Thanked 3,814 Times in 957 Posts
Failed 715 Times in 210 Posts
| Quote:
Originally Posted by .Renn.Sport why don't you pay attention in physics class? | rofl I bet most of the people can't explain it in physics terms.
I don't even know what OP means by "explain in depth." Maybe ask a prof if you want all the formulas and theories.
Just keep it simple. Heavier cars move slower.
| |
| | |
07-03-2010, 08:36 PM
|
#14 | | I WANT MY 10 YEARS BACK FROM RS.net!
Join Date: Jan 2006 Location: Abbotstan
Posts: 20,721
Thanked 12,136 Times in 3,361 Posts
Failed 1,848 Times in 413 Posts
| Quote:
Originally Posted by Rich Sandor It's not just about the power to weight ratio. If you have a 3500lbs car rolling down the highway, it takes a certain amount of force to make it stop, turn, or accellerate. If your car is only 2500lbs, it will be 'more willing' to change direction than a 3500lbs car. Lighter = more nimble in every way.
However, power is still very important, because weight does not affect your top speed - it only affects how quickly you get to the top speed. Aero, Horsepower, and Gearing are what determine your top speed. Those little lotuses are quick bastards around small and tight tracks, but a heavier car with significantly more power can be faster at the big long tracks! | Keeping in mind as well that this is "all else being equal". Heavy car with proper race tuned suspension = more nimble than light car with bagged-out stock shocks, and so forth.
Weight DISTRIBUTION matters to, somewhat to acceleration, but especially to handling. Within a certain range, 50/50 is optimal (meaning 50% of the weight is on the rear wheels, and 50% on the front). The further you go away from that, the more it affects handling.
But again, ALL ELSE BEING EQUAL, like Rich says, a lighter car will tend to accelerate and handle better than a heavier one.
In physics, it's all related to "intertia" and "conservation of momentum".
__________________ Quote:
Originally Posted by Godzira Does anyone know how many to a signature? | ..
Quote:
Originally Posted by Brianrietta Not a sebberry post goes by where I don't frown and think to myself "so..?" | | |
| | |
07-03-2010, 09:01 PM
|
#15 | | Rs has made me the man i am today!
Join Date: Sep 2007 Location: Vancouver
Posts: 3,189
Thanked 1,699 Times in 446 Posts
Failed 148 Times in 52 Posts
|
As a car's weight increases, its inertia and the friction forces acting on it increase as well (friction force is defined as Fr = N*[mu], N = normal force, which is proportional to the car's mass) - this is an oversimplification since a car is on wheels, but for the purpose of this explanation it stands. The increased static friction and inertia make it harder to move from a stopped position. While the increase in friction may also lead one to believe that the car will stop faster, the simple fact is a car's wheels lower the dynamic friction in the direction of the car's movement and thus the car's inertia is the limiting factor of a car's stopping power (i.e. heavier car -> more inertia -> takes more force to stop). The increased inertia also means it takes more force to change the direction of a car when it is moving.
Inertia is defined as the tendency of a body to maintain its state of rest or uniform motion unless acted upon by an external force ( http://www.wordnetweb.princeton.edu/perl/webwn).
Of course, this is an extreme oversimplification of how weight matters. As Soundy said, the distribution of weight will also affect the physics of a car's movement.
It's been a while since I've looked at dynamics. Let me know if I've messed up. I have a tendency to do so when it comes to any kind of applied mathematics. There's a reason I went into geology.
| |
| | |
07-03-2010, 09:08 PM
|
#16 | | I WANT MY 10 YEARS BACK FROM RS.net!
Join Date: Jan 2006 Location: Abbotstan
Posts: 20,721
Thanked 12,136 Times in 3,361 Posts
Failed 1,848 Times in 413 Posts
|
^Pretty much got it. I think the friction is a little over-stated as it relates to the total weight - variation in tire compounds would make a bigger difference. For that matter, silly things like gimped-out camber (VIP, anyone?) reducing the contact patch would make a bigger difference 
__________________ Quote:
Originally Posted by Godzira Does anyone know how many to a signature? | ..
Quote:
Originally Posted by Brianrietta Not a sebberry post goes by where I don't frown and think to myself "so..?" | | |
| | |
07-03-2010, 09:12 PM
|
#18 | | Rs has made me the man i am today!
Join Date: Feb 2002 Location: Burnaby
Posts: 3,191
Thanked 274 Times in 135 Posts
Failed 110 Times in 43 Posts
|
It's funny that this was brought up! Basically for normal performance driving and cornering, lighter is better, but once you go faster it's actually more beneficial to have more weight / downforce for maximum stability.
| |
| | |
07-03-2010, 11:44 PM
|
#19 | | Where's my RS Christmas Lobster?!
Join Date: Feb 2004 Location: vancouver
Posts: 841
Thanked 810 Times in 179 Posts
Failed 41 Times in 14 Posts
|
Lighter is usually better but not always the case.
Read up on Race Car Vehicle Dynamics by Bill and Doug Milliken
| |
| | |
07-03-2010, 11:52 PM
|
#20 | | 14 dolla balla aint got nothing on me!
Join Date: Mar 2009 Location: Richmond
Posts: 627
Thanked 319 Times in 111 Posts
Failed 31 Times in 10 Posts
|
a heavier car will feel more stable at very high speeds
| |
| | |
07-04-2010, 12:11 AM
|
#21 | | RS has made me the bitter person i am today!
Join Date: Dec 2008 Location: Richmond
Posts: 4,899
Thanked 2,649 Times in 884 Posts
Failed 218 Times in 79 Posts
|
THE MORE AN OBJECT WEIGHS
THE MORE POWER/FORCE IS NEEDED TO PROPEL THAT OBJECT TO A CERTAIN SPEED
IE. A 300 HP 4000 LBS CAR MIGHT TAKE 6.7 SECONDS TO REACH 60MPH
IT WILL ONLY TAKE 3.35 SECONDS FOR A 300HP 2000 LBS CAR TO GET TO 60 MPH
Theoretically speaking of course, with all factors being controlled (tires, road condition, driver weight)
| |
| | |
07-04-2010, 12:18 AM
|
#22 | | RS.net, helping ugly ppl have sex since 2001
Join Date: Sep 2008 Location: Vancouver
Posts: 8,858
Thanked 2,420 Times in 669 Posts
Failed 530 Times in 136 Posts
|
Lighter cars = better gas mileage. Thats a big difference at every gas station fill up!
__________________
2014 Honda Civic Si | |
| | |
07-04-2010, 06:36 AM
|
#23 | | OWNER/C.F.O./MONEYMAN
Join Date: Mar 2001 Location: Vancouver
Posts: 16,486
Thanked 2,253 Times in 626 Posts
Failed 6 Times in 3 Posts
| Quote:
Originally Posted by FerrariEnzo i think they have the Celica engine.. dont they? | celica gts engine = corolla xrs engine. same 1.8 190hp.
| |
| | |
07-04-2010, 06:44 AM
|
#24 | | Banned (ABWS)
Join Date: Oct 2006 Location: MacLeod
Posts: 7,298
Thanked 542 Times in 289 Posts
Failed 1,639 Times in 418 Posts
|
physics 11/12
*edit.. nvm.. it should be more like common sense
| |
| | |
07-04-2010, 11:22 AM
|
#25 | | OMGWTFBBQ is a common word I say everyday
Join Date: Oct 2008 Location: Coquitlam
Posts: 5,324
Thanked 3,782 Times in 1,242 Posts
Failed 533 Times in 187 Posts
|
Just put a tank engine in it.
__________________
'16 Ram 1500
| |
| | | |
Posting Rules
| You may not post new threads You may not post replies You may not post attachments You may not edit your posts
HTML code is Off
| | |
All times are GMT -8. The time now is 06:34 PM.
|
You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!
The banners on the left side and below do not show for registered users!
