Nice wheels, Lead. Hate to burst your bubble, though. A 17in wheel and tire will almost certainly weigh more than an 18in like wheel and tire combo. Yes, you are adding more alloy with an 18, but you are adding more rubber (denser than most alloys) with a 17. Remember, the total diameter with either size is still the same.
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
Very interesting G-Man. Thanks for the info.
'03 AT Sedan | Brilliant Silver | Willow Leather | Sport | Premium | Aerokit w/Spoiler | Nav
Although this is off the topic of LSD, relating to the tire size/ rim combo, an 18" wheel will most defiantly be heavier. The problem is not in the weight of the wheel, but in the rotating mass of any combination that is larger. The argument that the tire will have less stuff is rather weak, considering the tire itself doe not account for the most weight, and the further out the weight of the rim itself is the greater it's rotating mass. The rotating mass is what counts the most, it is the amount of stuff that the car must turn to continue it's momentum. For a further explanation, beyond my knowledge check out this article on VTEC.net - http://www.vtec.net/articles/view-ar...rticle_id=3469
Why are you confused?
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
Because of your and G-man's differing opinions. No big deal though. My purchase has been made and the new wheel/tire combo will be on tonight. Thanks for all the info anyway.
'03 AT Sedan | Brilliant Silver | Willow Leather | Sport | Premium | Aerokit w/Spoiler | Nav
Hey XZ, where have you been?
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
Semi On has been Semi Off lately as well.. where you at bro? XL has taken over the top non-administrator spot. And Semi, I know you don't care about number of posts -- just wondering where you're at? I miss your straight answers to dumb questions!
My 20" forged wheels/tires weight 0.5lbs less than my stock wheel/tire combo, so go figure... [dunno]
JT
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
This is the point... even though your combo may weigh less sitting still, when it rotates, the mass that is spinning increases. This said, if the mass of a wheel is mostly on the outside, where the tire mounts to it, that is where the rotating mass is focused.
Use this formula to decide what the rotating mass of your wheel is... that is the number you really want to know.
<font color="red">a=T(2/md+d/2I)</font id="red">
<font color="red">a = acceleration
T = torque driving the wheel
m = mass the wheel must "tow" from the center of rotation (COR)
d = diameter of tire
I = polar moment of inertia of wheel/tire combination</font id="red">
*** SIDE NOTE ***
They do make rims that are called "hub centric" these rims have the mass focused at the center of the wheel, they have less rotating mass than a conventional wheel, consequently they are really expensive.
Hey XZ, where have you been?
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
Semi On has been Semi Off lately as well.. where you at bro? XL has taken over the top non-administrator spot. And Semi, I know you don't care about number of posts -- just wondering where you're at? I miss your straight answers to dumb questions!
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Semi On
Work is pretty hectic at the moment and I've been doing a lot of traveling. This morning was the first time I got to drive my car in a week!
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
[rockon] Good to have you back!
Okay guys, now back to the LSD topic... Semi, can you shed some light on this? How does your coupe feel while hard cornering? Do you feel more of a restriction to the opposing slip wheel, or more torque to the opposing grip wheel? Let us know guy, peace!
XL
2003.5 5AT Sedan | Ivory Pearl | Graphite Leather | Sport | Premium | Aerokit W/Rear Spoiler
I would suspect that comparing an LSD to an electronic system is not too hard. The LSD should be difficult to feel a difference, except for the grip and less slip. The electronic system should feel like the TCS, in which case you might feel some throttle pull. I would vote the LSD is a much better system, but maybe not as good in the future. On the Honda Prelude they had a system that would check the pitch and yaw of the front and rear of the car and adjust accordingly, before grip was lost. That is a pretty effective system I have heard. (no personal experience with RWD LSD's however)
I hear a lot about this topic, both in other forums and among friends. To my understanding, only the coupe w/sport package has an LSD differential, but some salesmen at the dealer have been telling me that sport packaged sedans get the same treatment. Can anybody get the true scoop on who gets LSD and who doesn't? Thanks!
PS: Lead, this topic concerns you very well, as the LSD would be your number one weapon in autocross...
XL
2003.5 5AT Sedan | Ivory Pearl | Graphite Leather | Sport | Premium | Aerokit W/Rear Spoiler
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
AutoForums.com is the premier network of enthusiast-owned
enthusiast-operated automotive communities.
We operate more than 100 automotive forums where our users consult peers for shopping information and advice, and share
experiences and opinions as a community.
