Wheels for 997.1 GT3 to reduce unsprung mass?

[tomvcarter]

Hi Im looking for some light weight wheels for the GT3, and am tempted by the well reviewed OZ Ultraleggera's:
19"x8.5j F 9.6kg
19"x12.0j R 11.5kg

But does any one know what the weight is of the stock GT3 wheels (19")???

Thanks

[tomvcarter]

997 GT3 (Ronal???)
Front 8.5" @ 11.4 kg
Rear 12" @ 14.5 kg

?

[tomvcarter]

tomvcarter said:

997 GT3 (Ronal???)
Front 8.5" @ 11.4 kg
Rear 12" @ 14.5 kg

?

http://www.944racing.de/wheelweights.php

[tomvcarter]

10kg reduction in Unsprung mass (9.6kg) to be precise, will that make much difference?
Tks Tom

[Gibbo205]

tomvcarter said:

10kg reduction in Unsprung mass (9.6kg) to be precise, will that make much difference?
Tks Tom

There is a calculation for Unsprung mass and it something like either x2 or x4, can't remember which.

Basically if your reducing your unsprung mass by 10kg, then its the same as taking 20kg (x2) or 40kg (x4) out the car.

If its x4 you will notice it, if its x2 then not so much.

But saying this I reduced the unsprung mass considerably on my Mustang some years ago, went from 20" chrome wheels down to 18" lightweight alloys, 60-100mph dropped from 4.8s down to 4s which was quite substancial, but there was one other advantage, because I'd reduced the diameter of my wheel/tyre combo the gear ratio's as such shortened as well which obviously positively effects acceleration.

[Slippydiff]

Fit PCCBs if you haven't already got them . . . .

[GT Glee]

944racing.de appears to show 996 GT3.2 wheels are heavier than the BBS Sport Design of the GT3.1. I know I've had a few pints at lunchtime but I'm sure my eyes are not deceiving me..

[fioran0]

Porsche 997 Wheels

Porsche Factory Carrera S - 100 lbs, 0 oz.
8x19" 22 lbs. 4 oz.
11x19" 27 lbs. 12 oz.


Porsche Factory Carrera Classic - 104 lbs, 10 oz.
8x19" 23 lbs. 10 oz.
11x19" 28 lbs. 11 oz.

Porsche Factory Carrera Sport Design - 104 lbs, 12 oz.
8x19" 24 lbs. 3 oz.
11x19" 28 lbs. 3 oz.


Porsche Factory Carrera Sport - 106 lbs, 12 oz.
8.5x19" 24 lbs. 2 oz.
11.5x19" 29 lbs. 4 oz.

8x19 (987, 997 non turbo front) 23.4 pounds
8.5x19 (997 turbo front) 23.9 pounds
9.5x19 (987 rear) 25 pounds
11x19 (997 turbo rear) 28.8 pounds

Stock Turbo Wheels
8.5x19" 23 lbs. 8 oz
11x19" 27 lbs. 14 oz.

Factory 997 GT3
8.5x19" 24 lbs. 5 oz.
12x19" 30 lbs. 13 oz.

Tire Weights:
Potenza RE050A 24/32
ContiSportContact 2 21/29
Pilot Sport PS2 22/28
P Zero Rosso 22/28
Advan Sport 24/30

[Slippydiff]

GT Glee said:

944racing.de appears to show 996 GT3.2 wheels are heavier than the BBS Sport Design of the GT3.1. I know I've had a few pints at lunchtime but I'm sure my eyes are not deceiving me..

The Mk1 wheels are actually reasonably light. The Mk2 rears are an inch wider and the fronts half an inch wider, I'd be surprised if the Mk2s weren't heavier.

[DAB964RS]

From memory Rays wheels are one of the lightest available - colout choice is limited though....

http://www.rays-msc.com/wheels/index.cgi?d=76

[Steviebeee]

Can 18" wheels be ran on at 997.1 GT3 ?

[keep it lit]

Steviebeee said:

Can 18" wheels be ran on at 997.1 GT3 ?

oh yeah.. 997.1 cup cars run 18" rims.

[Slippydiff]

More Porsche, less "Ricer" than Rays.

http://www.6speedonline.com/forums/gt3-gt2-gt/1664...

[Glenn McMenamin]

I bought some Champion Motorsport RS98's from the states. Quite a bit lighter than standard wheels.

[nsm3]

fioran0 said:

Porsche 997 Wheels

Porsche Factory Carrera S - 100 lbs, 0 oz.
8x19" 22 lbs. 4 oz.
11x19" 27 lbs. 12 oz.


Porsche Factory Carrera Classic - 104 lbs, 10 oz.
8x19" 23 lbs. 10 oz.
11x19" 28 lbs. 11 oz.

Porsche Factory Carrera Sport Design - 104 lbs, 12 oz.
8x19" 24 lbs. 3 oz.
11x19" 28 lbs. 3 oz.


Porsche Factory Carrera Sport - 106 lbs, 12 oz.
8.5x19" 24 lbs. 2 oz.
11.5x19" 29 lbs. 4 oz.

8x19 (987, 997 non turbo front) 23.4 pounds
8.5x19 (997 turbo front) 23.9 pounds
9.5x19 (987 rear) 25 pounds
11x19 (997 turbo rear) 28.8 pounds

Stock Turbo Wheels
8.5x19" 23 lbs. 8 oz
11x19" 27 lbs. 14 oz.

Factory 997 GT3
8.5x19" 24 lbs. 5 oz.
12x19" 30 lbs. 13 oz.

Tire Weights:
Potenza RE050A 24/32
ContiSportContact 2 21/29
Pilot Sport PS2 22/28
P Zero Rosso 22/28
Advan Sport 24/30

So the "lightweight wheels" from the 7.1 GT3 brochure are actually the heaviest across the whole 997 range? That's a bit dissapointing to read.

[Slippydiff]

nsm3 said:

So the "lightweight wheels" from the 7.1 GT3 brochure are actually the heaviest across the whole 997 range? That's a bit dissapointing to read.

Ahhh yes, but lots comment how wonderful the 993 RS Speedline split rims are, try picking one up after a 964 RS Magnesium wheel and be prepared to visit your local hernia clinic.

[all2ofme]

Mental note not to pick up those ones then, Slippy - I've already had myself put back inside my myself twice in 12 months!

(They do look fantastic, though.)