Re: Handling/Ride: +Rubber/-Unsprung weight?
 

"Charles Lasitter" wrote

>
> > its performance, not it's performance. It's = it is
>
> You caught me!

Ah - I was worried about you -- you DO have a sense of humor! ;)

Re: Handling/Ride: +Rubber/-Unsprung weight?
 

thanks mike.

Re: Handling/Ride: +Rubber/-Unsprung weight?
 

thanks mike.

Re: Handling/Ride: +Rubber/-Unsprung weight?
 

Theyre 13lbs. 77lbs would weigh a ton on a honda civic..theyre lightweight.



"Brian Smith" <Halifax@NovaScotia.Canada> wrote in message
news:Rzt7e.38468$jR3.25262@edtnps84...
>
> "hondaman" <jeffscomp@sbcglobal.net> wrote in message
> news:I2l7e.3268$716.233@newssvr19.news.prodigy.com ...
>> Definetly get some lightweight wheels and as far as tires get the
>> goodyears if they will last a long time. You'll be giving up weight by
>> mounting them on lightweight rims. I have some Konig rims on my Civic
>> that have the weight molded on the outer part of the rim. It's 635kg.
>> which is about 13lbs. pretty light. I recommend Konig for your wheels
>> theyre well balanced and precision made.
>
> 635 kg = 77 lb
>

Re: Handling/Ride: +Rubber/-Unsprung weight?
 

Theyre 13lbs. 77lbs would weigh a ton on a honda civic..theyre lightweight.



"Brian Smith" <Halifax@NovaScotia.Canada> wrote in message
news:Rzt7e.38468$jR3.25262@edtnps84...
>
> "hondaman" <jeffscomp@sbcglobal.net> wrote in message
> news:I2l7e.3268$716.233@newssvr19.news.prodigy.com ...
>> Definetly get some lightweight wheels and as far as tires get the
>> goodyears if they will last a long time. You'll be giving up weight by
>> mounting them on lightweight rims. I have some Konig rims on my Civic
>> that have the weight molded on the outer part of the rim. It's 635kg.
>> which is about 13lbs. pretty light. I recommend Konig for your wheels
>> theyre well balanced and precision made.
>
> 635 kg = 77 lb
>

Re: Handling/Ride: +Rubber/-Unsprung weight?
 

"Michael Pardee" <michaeltnull@cybertrails.com> wrote in
news:j7CdnWLY6t71aMPfRVn-jw@sedona.net:

> Ride and suspension conformance to the road surface both improve
> as the ratio of sprung to unsprung weight increases.

Wow. From all the other physics discussions I've read, I can only
say "it depends".

> Within the load limits of the suspension, more weight in the trunk
> smooths the ride and helps hold the tires on the pavement over
> bumps.

> Think of it as: the road makes your wheels bounce and your wheels
> make your car bounce. The lighter the wheels the poorer the energy
> transfer from the road interface to the car.

http://tinyurl.com/9yuqu

A lighter wheel has less mass when it bounces and if it was not
opposed by the springs or dampeners, yes, it would bounce more, and
that would be bad from many standpoints.

But the springs oppose this action, and they don't have to compress
as much to do so with a lighter wheel.

Now ideally ALL the components of a suspension system should be
matched and tuned. The spring rate and shocks would match the tires,
which would match the style of driving, the vehicle load, and so on.
There's nothing about it that's cut and dried as far as I can tell.

> Bicycling enthusiasts are even more rabid, since spinning the
> wheel mass up takes some leg power. The mantra is "an ounce on the
> wheel is worth a pound on the frame." I don't know just how true
> that is, but you get the idea.

Rotational mass can be very important, and it all depends on where
you start. Bicycle riders don't produce much torque compared to a
four cylinder engine, and so they're right to be rabid about it.

Four cylinder engines generally don't produce the torque of six or
eight cylinder engines, and so rotational mass makes more of a
difference.

Miata owners are very keen to control and reduce the weights of their
wheels because their cars are light and by all their accounts the
difference will be quite large.

In a few weeks I hope to have some lighter wheels on my 4Cyl LX, and
then I'll know for sure whether it makes any difference, at least for
me.

-- CL.

+-----------------------------------------+
| Charles Lasitter | Mailing / Shipping |
| 401/728-1987 | 14 Cooke St |
| cl+at+ncdm+dot+com | Pawtucket RI 02860 |
+-----------------------------------------+

Re: Handling/Ride: +Rubber/-Unsprung weight?
 

"Michael Pardee" <michaeltnull@cybertrails.com> wrote in
news:j7CdnWLY6t71aMPfRVn-jw@sedona.net:

> Ride and suspension conformance to the road surface both improve
> as the ratio of sprung to unsprung weight increases.

Wow. From all the other physics discussions I've read, I can only
say "it depends".

> Within the load limits of the suspension, more weight in the trunk
> smooths the ride and helps hold the tires on the pavement over
> bumps.

> Think of it as: the road makes your wheels bounce and your wheels
> make your car bounce. The lighter the wheels the poorer the energy
> transfer from the road interface to the car.

http://tinyurl.com/9yuqu

A lighter wheel has less mass when it bounces and if it was not
opposed by the springs or dampeners, yes, it would bounce more, and
that would be bad from many standpoints.

But the springs oppose this action, and they don't have to compress
as much to do so with a lighter wheel.

Now ideally ALL the components of a suspension system should be
matched and tuned. The spring rate and shocks would match the tires,
which would match the style of driving, the vehicle load, and so on.
There's nothing about it that's cut and dried as far as I can tell.

> Bicycling enthusiasts are even more rabid, since spinning the
> wheel mass up takes some leg power. The mantra is "an ounce on the
> wheel is worth a pound on the frame." I don't know just how true
> that is, but you get the idea.

Rotational mass can be very important, and it all depends on where
you start. Bicycle riders don't produce much torque compared to a
four cylinder engine, and so they're right to be rabid about it.

Four cylinder engines generally don't produce the torque of six or
eight cylinder engines, and so rotational mass makes more of a
difference.

Miata owners are very keen to control and reduce the weights of their
wheels because their cars are light and by all their accounts the
difference will be quite large.

In a few weeks I hope to have some lighter wheels on my 4Cyl LX, and
then I'll know for sure whether it makes any difference, at least for
me.

-- CL.

+-----------------------------------------+
| Charles Lasitter | Mailing / Shipping |
| 401/728-1987 | 14 Cooke St |
| cl+at+ncdm+dot+com | Pawtucket RI 02860 |
+-----------------------------------------+