For the reduction in weight for the rims, when going from stock
rims to Spoon 15" rims, how much can be saved at 1/4 miles?

thanks

 

I'm not sure about that, but I do know for ever 100 lbs you shave off you will be quicker by 0.1 secs.

 

thanks,

but for every lb you save on the wheel, is it really can be multiplied by 4?

which means for spoon rims, it's going from 15lb stock to 8lb, we save 7lb per wheel, that means we save 28lbs x 2 in total (because front wheel drive) =
56lb in total?

 

For every 100 pounds you gain a tenth?I don't think so.That is a bit too conservitive.I think for the almost $1,700 dollars the Spoon wheels cost you can find a moy cost effective way to go faster.

 

The 100 lbs for every tenth is static weight (carpet, door panels, glass, etc.)

Rotational weight is a very different animal all together. Dropping 6-7 pounds in the wheel weight reduces the rotational weight quite a bit, making the acceleration better. Think of a lightened flywheel, or a balanced/knife edged crank.

 

Exactly, I am with TypeR0207

I agree you can get more Power with some other mods at 1500.
But wheels, flywheels improve accererlation through the entire bands,
and most mods usually give you more top or mid power by sacrificing
low end power. Plus wheels are 100% guranteed trouble free.

That's why I would like to know how much it will help in accerlation
to go from stock rims to Spoon rims at 15 inches.

thanks

 

i have no experince with changing rims and checking times at the track. but your car will handle and accelerate better with the spoons not to mention the looks you will get!

 

And I think the best answer is: "Dont expect too much improvement in acceleration". Throttle response will probably *feel* slightly better but the biggest improvement will be noted in braking. A good mod if you were planning on switching the wheels anyways, but like others have pointed out, not cost-effective if you are going for better 1/4 mile times!

 

actually, in terms of tegs...I have done many tests and found that 100lbs equals about .2 seconds

 

Really? Thats neat!@

 

Integra2000,Imagine what looks you will get?I have ran flat black wheels on my car most of the looks I got were in disgust.Unless the person is a JDM enthusiast they usually will think it looks like ****.I am not an engineer nor will I pretend to be one so I won't attemt to talk about rotational,blah,blah.But here play with this http://www.prestage.com/carmath/calc_etmph.asp It will give you an example of what lowering your weight can do for you.

 

For 1500 bucks get headwork and really feel the gains and see some reduction in et..

 

Heres my input from what I have read.

Every 100 lbs reduction is "dead" weight equals roughly .1 faster in teh quarter mile.
Every 10 lbs of rotating mass equals roughly 100 lbs of dead weigh.

So...if you save 7 lbs per rim..thast 28 lbs of rotating mass ...which is roughly equal to 280 lbs of "dead" weight. So... .2-.3 faster in the quarter mile can/should be expected.

 

So my car runs a 14.0 and If I put Spoon wheels on it I will be running a 13.7.Just as easy as that?I don't think so.

 

You'd be surprised.

So youre saying that...if you took your 14.0 second ITR and removed 280 lbs of weight out of it..it would not be .2-.3 faster?

 

And what calculation are you using to determine that saving less than 25 pounds turns into 280 pounds?So are you saying that a dunlop sp9000 that is about 18 lb's(195 50 15)vs a Kuhmo (712 205 50 15)That is a little over 22 lbs would be like adding 280 pounds?Or does this magical theory only apply to "Spoon"wheels?

 

I think he's talking about centrifugal force. I'm not convinced either that those wheels would significantly impact your quarter mile.

On paper they should. His theory works more for road racing, they will definitely make a difference with acceleration and braking for sure and certainly reduce your lap times.

 

Jeff,I hope you see where I am coming from though.280 lbs that is rediculous.

 

Ok..it appears that the 10 lb to 100 lb ratio was off..by quite a bit

I did some research..and through someone else's testing..they found 50 lbs of total wheel weight reduction equaled about 208 lbs of "regular" weight.
So its about a 4:1 ratio.

Check out this thread for more info. The guy dropped from a 15.30 to a 14.95 by reducing the wheel weight by 50 lbs
http://ferrari.colowatch.com/php/sho...=&view=&sb=&o=


[Modified by HX_Guy, 2:12 PM 7/26/2001]

 

I was always told that 1 lb of rotational weight was equal to 8lbs dead weight...so 7 lbs lighter per wheel would be 56 x 4 or 124 lbs....not 280, that does seem too high...

 

Correct me if I'm wrong but I believe that there is a 10:1 rule when it comes to rotational weight ie. if you lose 10lbs on your wheels your car reacts like it is 100lbs.

 

i agree with you there, weight reduction is very important for honda coz we have no torque.

 

Wasn't there an article in Technobabble about this? For instance, taking weight off the flywheel makes a much greater impact than taking weight off the wheels. He estimated a 209 lb difference in "dead weight" by dropping 9-10 lbs off the flywheel. That says nothing for intertia and how it affects acceleration, but that's another topic. My basic understanding was that rotational weight at the flywheel and rotational weight at the wheels had different impacts on acceleration... EV.

 

i was skimming a book entitled "chassis engineering" and they had a section about rotational weight. You are right electronVTEC, they said that weight taken off of the flywheel will have more impact than weight taken off the rims, because the flywheel is spinning faster (that was their argument).
They did some tests and lightening the wheels improved their times and increased trap speed, but lightening the flywheel did much more with respect to the amt of weight taken off.
I dont remember the exact numbers, so if anyone can swing by Barnes and nobles or whatever and glance in that book (towards the end) you will see their test results.

 

Forgive me if I am wrong or sound like I'm talking out of my *** but I now a little about physics. The larger a wheel is and the heavier it is gives it more rotational inertia thus requiring more energy to turn it. So reasoning that a smaller lighter wheel will require less energy to turn is true. I would think though that one must consider tire weight and diameter along with the wheel since they will be working together. The weight distribution throughout the wheel would also be a factor. The weight of the front wheels(in a FWD) would be more important than the weight of those in the back since they are just rolling with the car. I don't think a change in wheels would result in a significant change in speed but maybe a little. Best thing would be to ask someone with Spoons or Volks and see what their experiences were.