Weight reduction...Rotational mass vs deadweight?

[J_C]

So I'm looking at a wheel/tire setup that is slightly over 50 lbs lighter than the stock performance pack on the 13+ sho's. I'm curious how that compares to dead weight reduction and how noticeable in everyday driving with occasional trip to the drag strip?

 

[FoMoCoSHO]

http://www.victorylibrary.com/mopar/sprung-c.htm

 

[Sabtaj1]

Well.  If I did my math right (probably not) if you were to drop 10lbs off each corner it would be almost like taking right around 300lbs out of the car.  But I'm terrible at math, heads up.  LoL. 

 

[Scott4957]

http://www.victorylibrary.com/mopar/sprung-c.htm

My take away, the term unsprung weight is often improperly used. Reduction in sprung and unsprung weight have the same effect on acceleration. Reduction of rotational mass has a greater impact on acceleration but is often exaggerated. There is no equation to determine the "additional positive impact" the reduction in rotational mass has on acceleration.

I think the right tire will have a greater impact on 1/4 mile times than shaving a few pounds off each wheel.

 

[J_C]

http://www.victorylibrary.com/mopar/sprung-c.htm

Very good information here but I was hoping the gains of a lighter wheel and tire were more significant than they suggest

 

[Sabtaj1]

I believe it would have more impact on an all wheel drive vehicle however.  I would like to see if it actually makes a difference on our ecos

 

[J_C]

I believe it would have more impact on an all wheel drive vehicle however.  I would like to see if it actually makes a difference on our ecos

This is how I feel about it as well, but without testing it during the same day without any other changes it may be hard to determine.

 

[fastforever]

My experience from days gone by in road racing is that less rotational weight has multiple advantages. Improved acceleration, braking and especially handling. Your suspension will react quicker on rough roads due to less weight. Less energy is required to turn less weight and the same for braking.    The higher the percentage of weight reduced the better. Anything over 10lbs per corner on our cars will absolutely be felt!

 

[SHOnUup]

The one person I know that had time at the dragway with the stock wheels vs a lighter setup lost a tenth in the 1/4 with the lighter wheels....I guess traction became more of an issue.

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[J_C]

My experience from days gone by in road racing is that less rotational weight has multiple advantages. Improved acceleration, braking and especially handling. Your suspension will react quicker on rough roads due to less weight. Less energy is required to turn less weight and the same for braking.    The higher the percentage of weight reduced the better. Anything over 10lbs per corner on our cars will absolutely be felt!

This past spring I replaced the wheels and tires on my Mustang with a lighter set and it was noticeably easier to turn but hard to say on quicker acceleration. To me the GT350 flow formed wheels with General Gmax tire would be a great light weight setup at a affordable price. Even if the gains are less than I was hoping for they're a great looking wheel in my opinion!