98 GT vs. charger
#8
02-11-2006 | 10:23 PM
BMC Member# 03209
Joined: Jan 2005
Posts: 1,735
From: north ridgeville, ohio
wen i switched from 17's to 18's it was only a few pound difference i dont think they slow u down as much as ppl say or maybe its jsut the fact that the 17's had 245 nitto 555's and the 18s have 285 bfg dr's
#12
02-12-2006 | 06:39 AM
Traitor...lol
Joined: Sep 2004
Posts: 7,939
From: Lexington, SC
Im telling you man, until you put those heads and intake on, your car is going to be a dog, plain and simple. Go for a ride in a PI car, and youll know. You will sell everything you just bought and get the heads/cams/intake and exhaust that second.
#15
02-12-2006 | 10:37 AM
Always Detailin'
Joined: Oct 2005
Posts: 3,556
From: Dayton, OH
From MT:
17x9 Chrome Bullitt: 25 lbs
17x10.5 chrome bullitt: 27: lbs.
18x9 chrome bullitt: 29 lbs.
18x10 chrome bullitt: 30 lbs.
There is not a big weight difference in wheels at all, a deep dish 17 inch wheel will not go slower, than a 17x9 wheel in the rear, (If it does it would be less than .05 secs)
18 inch wheels will go slower because theyre is more rotating mass or something, doesnt have much to do with the weight.
17x9 Chrome Bullitt: 25 lbs
17x10.5 chrome bullitt: 27: lbs.
18x9 chrome bullitt: 29 lbs.
18x10 chrome bullitt: 30 lbs.
There is not a big weight difference in wheels at all, a deep dish 17 inch wheel will not go slower, than a 17x9 wheel in the rear, (If it does it would be less than .05 secs)
18 inch wheels will go slower because theyre is more rotating mass or something, doesnt have much to do with the weight.
#16
02-12-2006 | 10:53 AM
Administrator
Joined: Sep 2004
Posts: 11,974
From: Orlando,Florida
Originally Posted by whitethunder46
From MT:
17x9 Chrome Bullitt: 25 lbs
17x10.5 chrome bullitt: 27: lbs.
18x9 chrome bullitt: 29 lbs.
18x10 chrome bullitt: 30 lbs.
There is not a big weight difference in wheels at all, a deep dish 17 inch wheel will not go slower, than a 17x9 wheel in the rear, (If it does it would be less than .05 secs)
18 inch wheels will go slower because theyre is more rotating mass or something, doesnt have much to do with the weight.
17x9 Chrome Bullitt: 25 lbs
17x10.5 chrome bullitt: 27: lbs.
18x9 chrome bullitt: 29 lbs.
18x10 chrome bullitt: 30 lbs.
There is not a big weight difference in wheels at all, a deep dish 17 inch wheel will not go slower, than a 17x9 wheel in the rear, (If it does it would be less than .05 secs)
18 inch wheels will go slower because theyre is more rotating mass or something, doesnt have much to do with the weight.
rotating mass is the weight of the wheel being moved FYI.
so the wheel that weights more aka 18" is slower.
#17
02-12-2006 | 12:36 PM
Guest
Posts: n/a
Originally Posted by spike_africa
rotating mass is the weight of the wheel being moved FYI.
so the wheel that weights more aka 18" is slower.
so the wheel that weights more aka 18" is slower.
I = 1/2 MR^2
m -> mass
r -> radius
I -> Inertia
#19
02-12-2006 | 09:26 PM
Senior Member
Joined: Nov 2004
Posts: 1,787
From: Murfreesboro, TN
The Hemi will put a bad hurting on a 98 GT. Im still trying to keep up with them! I ran a couple and they pull pretty good. Its about like racing an 05 GT. Oh yea and I ran an 300M SRT-8 and got spanked because I didnt spray it.
#21
02-12-2006 | 10:46 PM
Always Detailin'
Joined: Oct 2005
Posts: 3,556
From: Dayton, OH
Originally Posted by CCM
It has nothing to do with the weight of the wheels, it's the circumference. The smaller your tire's circumference, the better you'll be off the line.
#22
02-13-2006 | 10:07 AM
Guest
Posts: n/a
Originally Posted by whitethunder46
That's the point I was tryin to make! lol.
radius...
wow... i thought i made it clear...
Newtons 2nd law...
Inertia (I) - The resistance to motion
I=1/2mr^2 or
Inertia equals one half the mass(of rotating object) multiplied br the radius squared... in this case the radius would be the wheel...
THE WEIGHT DOES MAKE A DIFFERENCE... but compared to the radius the wight makes very little... its the radius that matters
#23
02-13-2006 | 10:23 AM
Married.
Joined: Jun 2005
Posts: 1,234
From: OK
Yall are retarded. A 17" wheel has taller tire than an 18" will have, thus equalling basically the same overall tire+rim height. The inch you add with an 18 rim is negated with a shorter sidewall so the overall height of a 17 ands 18 is the same. The only factor in play is the weight of the wheel which is not that big:
17 - less wheel wieght, more tire wieight (taller tire)
18 - more wheel weight, less tire weight (shorter tire)
or maybe I'm wrong.
17 - less wheel wieght, more tire wieight (taller tire)
18 - more wheel weight, less tire weight (shorter tire)
or maybe I'm wrong.
#24
02-13-2006 | 10:30 AM
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Posts: n/a
Originally Posted by FritoBandito
Yall are retarded. A 17" wheel has taller tire than an 18" will have, thus equalling basically the same overall tire+rim height. The inch you add with an 18 rim is negated with a shorter sidewall so the overall height of a 17 ands 18 is the same. The only factor in play is the weight of the wheel which is not that big:
17 - less wheel wieght, more tire wieight (taller tire)
18 - more wheel weight, less tire weight (shorter tire)
or maybe I'm wrong.
17 - less wheel wieght, more tire wieight (taller tire)
18 - more wheel weight, less tire weight (shorter tire)
or maybe I'm wrong.
the majority of the mass in in the rim... the rim is what makes it harder to turn... unless you run tires made of steel the effects they make twards the rotating weight are negligible
#25
02-13-2006 | 10:35 AM
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Posts: n/a
lets say that you have 2 wheels... 1 17in one 18in and they weight the same...
i will prove to you that the 17 is easier to turn
lets just say that the both have a mass of 20lbs...
1/2(20)(17^2)=2890lbs/sqrIN
1/2(20)(18^2)=3240lbs/sqrIN
__________________________________
when ya'll get to college ya should bout this...
i will prove to you that the 17 is easier to turn
lets just say that the both have a mass of 20lbs...
1/2(20)(17^2)=2890lbs/sqrIN
1/2(20)(18^2)=3240lbs/sqrIN
__________________________________
when ya'll get to college ya should bout this...
#26
02-13-2006 | 10:37 AM
Married.
Joined: Jun 2005
Posts: 1,234
From: OK
Exactly, not much of a weight difference overall will not be detrimental. If the 18's weigh more with tires, the car will be slightly slower.
The mass of a 17 and 18 are not equal so your equation is faulted. By the time the weight of the tires are added, the ratio of total weight of a 17 and 18 with tires is very similar.
The mass of a 17 and 18 are not equal so your equation is faulted. By the time the weight of the tires are added, the ratio of total weight of a 17 and 18 with tires is very similar.
#27
02-13-2006 | 10:44 AM
Married.
Joined: Jun 2005
Posts: 1,234
From: OK
In your equation, the 17 and 18 diameters are plugged in wrong. They do not include the total height with the tire ( it works only if you drive on the rims). Your total height on each will be around 22-23 inches so use this number for both and guess what, the lbs/sqin will be equal. The total height must be plugged in, the weight is the only factor.
#28
02-13-2006 | 10:47 AM
Guest
Posts: n/a
Originally Posted by FritoBandito
Exactly, not much of a weight difference overall will not be detrimental. If the 18's weigh more with tires, the car will be slightly slower.
The mass of a 17 and 18 are not equal so your equation is faulted. By the time the weight of the tires are added, the ratio of total weight of a 17 and 18 with tires is very similar.
The mass of a 17 and 18 are not equal so your equation is faulted. By the time the weight of the tires are added, the ratio of total weight of a 17 and 18 with tires is very similar.
ya know what figure it out for yer selves
use this equation for the wheels... I=1/2mr^2
and this for the tire... I=1/2m(outer radius^2)-1/2m(inner radius^2)
#30
02-13-2006 | 10:56 AM
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Posts: n/a
think of this...
if they both have the same radius wheel+tire... the 18s will weigh quite more since aluminum is heavier than rubber...
so where the difference really lies is in the rim...
you can sit and argue this...
but the fact is... some ******* named newton ate lots of fig newtons and came up with these laws of motion and the equations to go w/ them... they have been proven... you can take the time and try to figure it all out...
the 18" add are heavier w/ a larger radius rim... the wheel alone is much harder to turn than a 17"...
a rubber tire will make a difference but a very minimal... its made of rubber and filled w/ air...
if they both have the same radius wheel+tire... the 18s will weigh quite more since aluminum is heavier than rubber...
so where the difference really lies is in the rim...
you can sit and argue this...
but the fact is... some ******* named newton ate lots of fig newtons and came up with these laws of motion and the equations to go w/ them... they have been proven... you can take the time and try to figure it all out...
the 18" add are heavier w/ a larger radius rim... the wheel alone is much harder to turn than a 17"...
a rubber tire will make a difference but a very minimal... its made of rubber and filled w/ air...