My New Rims
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From: Whitby, Ontario, Canada
QUOTE (Mad-Machine @ Jul 19 2005, 06:01 PM)
They could use a similar system to what Enkei does. they have a cast process that spins the entire rim as it is poured and cools.. resulting in a very uniform and strong rim.
Mad, This has nothing to do with the density of the metal.
Spinning the metal into the mold is just to eliminate air pockets within the mold.
hense "casting".
My rims are forged, then CNC milled.
The density will remain the same thoughout. you must heat treat, or compress the metal in order to make
it more dense (stronger).
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From: Chicago, IL
These rims are light pressure casted.
Similarly to 'spun casted' rims in that the spinning creates pressure which, as Mad said, eliminates air pockets and causes the metal to set closer than it would when 'gravity' casted, which is the cheapest casting method.
Most cast rims are gravity cast by simply pouring the liquid metal into the mould.
Adding pressure is the closest compromise to 'Forging'. Till the ROJA LT5, I've never seen a cast rim weigh lighter than a Forged rim. The previous owner weighed them at a wheel shop and they weighed 13.78 lbs each.
I'll still drive careful though.
Similarly to 'spun casted' rims in that the spinning creates pressure which, as Mad said, eliminates air pockets and causes the metal to set closer than it would when 'gravity' casted, which is the cheapest casting method.
Most cast rims are gravity cast by simply pouring the liquid metal into the mould.
Adding pressure is the closest compromise to 'Forging'. Till the ROJA LT5, I've never seen a cast rim weigh lighter than a Forged rim. The previous owner weighed them at a wheel shop and they weighed 13.78 lbs each.
I'll still drive careful though.
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From: SOUTH Jersey
The reason I bring up the spin casting.. is because they are MUCH stronger than standard Casting.. not as strong as Forged, but not nearly as weak as a cheap cast rim.
Even SCC mentioned that in the rims they recommend for racing. Unlike many Cast rims, Enkei rims can survive being dropped off the edge of the track, run up over the kerb, or even contact with other cars without breaking due to their unique casting process.
Even SCC mentioned that in the rims they recommend for racing. Unlike many Cast rims, Enkei rims can survive being dropped off the edge of the track, run up over the kerb, or even contact with other cars without breaking due to their unique casting process.
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From: Chicago, IL
Yep, spinning will make it strong and relatively light. Basically, spinning is the medium to apply pressure.
RoJa probably uses another medium/method, but they are definately pressured.
RoJa probably uses another medium/method, but they are definately pressured.
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Vehicle: 1997/ Hyundai/ Tiburon
heres a link i found originally from nt.com... i think this will help you guys a bit..
http://www.jtuned.com/content/templates/tu...d=288&zoneid=16
http://www.jtuned.com/content/templates/tu...d=288&zoneid=16
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From: Chicago, IL
I found this part of the article VERY interesing:
"The weight from the Suspension apparatus which includes the Tire and Wheel combination is called “Unsprung Weight”, and reducing the weight of this section is crucial to the performance of the vehicle. If 1kg of weight is saved from the suspension system, the value of a 15kg weight loss from the vehicle’s overall weight can be saved. This means if an aluminum wheel which is 1kg lighter than a stock steel wheel is installed, 60kg of total of body weight can be saved"
1 kg = 2.2 lbs
So, If a stock steel rim weighs 18 lbs and the new rims weigh 13.8 lbs then I save
4.2 lbs = (2 kgs per rim X 4)= 8 kgs total unsprung saved....which is equivalent to 120 kgs of body weight which translates to 264 lbs saved. Wow.
friday.gif
"The weight from the Suspension apparatus which includes the Tire and Wheel combination is called “Unsprung Weight”, and reducing the weight of this section is crucial to the performance of the vehicle. If 1kg of weight is saved from the suspension system, the value of a 15kg weight loss from the vehicle’s overall weight can be saved. This means if an aluminum wheel which is 1kg lighter than a stock steel wheel is installed, 60kg of total of body weight can be saved"
1 kg = 2.2 lbs
So, If a stock steel rim weighs 18 lbs and the new rims weigh 13.8 lbs then I save
4.2 lbs = (2 kgs per rim X 4)= 8 kgs total unsprung saved....which is equivalent to 120 kgs of body weight which translates to 264 lbs saved. Wow.
friday.gif
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looks pretty decent man. I doubt they are 13lbs though. I might be wrong, but they must be forged to be so light, and even then it seems a bit too low.
Mine were 14.5lbs.
Stock 14s are about 17-18lbs, 15s are about 19lbs.
Mine were 14.5lbs.
Stock 14s are about 17-18lbs, 15s are about 19lbs.
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Vehicle: 2001/Hyundai/Tiburon
QUOTE (Screwdriver @ Jul 20 2005, 03:36 PM)
I found this part of the article VERY interesing:
"The weight from the Suspension apparatus which includes the Tire and Wheel combination is called “Unsprung Weight”, and reducing the weight of this section is crucial to the performance of the vehicle. If 1kg of weight is saved from the suspension system, the value of a 15kg weight loss from the vehicle’s overall weight can be saved. This means if an aluminum wheel which is 1kg lighter than a stock steel wheel is installed, 60kg of total of body weight can be saved"
1 kg = 2.2 lbs
So, If a stock steel rim weighs 18 lbs and the new rims weigh 13.8 lbs then I save
4.2 lbs = (2 kgs per rim X 4)= 8 kgs total unsprung saved....which is equivalent to 120 kgs of body weight which translates to 264 lbs saved. Wow.
friday.gif
"The weight from the Suspension apparatus which includes the Tire and Wheel combination is called “Unsprung Weight”, and reducing the weight of this section is crucial to the performance of the vehicle. If 1kg of weight is saved from the suspension system, the value of a 15kg weight loss from the vehicle’s overall weight can be saved. This means if an aluminum wheel which is 1kg lighter than a stock steel wheel is installed, 60kg of total of body weight can be saved"
1 kg = 2.2 lbs
So, If a stock steel rim weighs 18 lbs and the new rims weigh 13.8 lbs then I save
4.2 lbs = (2 kgs per rim X 4)= 8 kgs total unsprung saved....which is equivalent to 120 kgs of body weight which translates to 264 lbs saved. Wow.
friday.gif
yep, unsprung weight is a crucial element of tuning your car for good handling. part of the reason why i wont be jumping on the xg 350 hyundai oem big brake kit. its like an exta 15lbs. at each corner. Eyecrazy.gif
