ross74

Saw the thread bellow but I have the same question regarding the 997.2

I have a '09 CS2 and would like to fit the wheels from the new GT3.

Do they fit?
Are they any lighter? (dont wont to go down the non OEM road..)

Nugget

No, the new GT3 uses centerlock wheels and your C2S has the traditional 5-lug wheels.

Edgy01

Besides, they're not going to be lighter. It's not done for lightness.

ross74

Guys

I dont get it. For the new Turbo Porsche offers both wheels one with centerlock and one with the traditional mechanism. So i assume they are somehow interchangeable?

I am in love with the new GT3 wheel design...

kosmo

its a different bolt design. I luv the centerlocking wheels on the new TT.

MJones

Different Hubs...
5 lug & Centerlock

kosmo

off topic Mjones, but can "regular tire shops" like NTB or discount tire handle centerlocks?

Edgy01

Yes. The wheel for the purpose of mounting a tire, are one and the same.

WalkerInTN

Yes, they actually will fit your car. But as everyone has pointed out, the wheel attachment system is different.

In addition to the wheels themselves, you'll also have to buy the rest of the parts to convert over to the centerlock setup, as well as the socket & torque multiplier to remove or install the wheels. Porsche is offering these parts now as upgrades for the 997 MK1 GT3/RS, & is running ads in the various Porsche magazines for them. No idea what the cost would be, but I assure you, they're not cheap.

Also keep in mind that once you've converted to centerlocks, your current 5 bolt wheels won't work on your car anymore.

As far as lightness, I wouldn't expect much weight savings, if any. I'd bet a set of Champion wheels would be lighter & cheaper.

MJones

If they have a ¾" Torque wrench that can tighten to 350 ft lb....all is good

utkinpol

I was always wondering - how an average person with no power tools in his own garage can unfasten a nut that was tighten at 350 ft/lb?

Or is it not so bad in reality as I think it is? But I doubt it.

ross74

Thanks WalkerInNT thats what i thought... I guess the most effective way to reduce unsprung mass is PCCB..

Nugget

If brute force doesn't work you're just not using enough.

CarlJ

Leverage. Use a longer handle. if you had a 4 ft handle, you would only need to apply 87.5 lbs of force.

WalkerInTN

That would work, you'll definitely save some weight there. Kinda pricey to add though.

I think a more effective, less costly way would be aftermarket wheels. I weighed my Champion RG5 wheels before installing them on my GT3. RG5 weights were without wheel sensors or center caps.:

------------RG5-----Stock GT3
Front------20.06-------23.5
Rear------21.25-------31.0

(stock GT3 weights I used were posted here on Rennlist, I don't know if they included the wheel sensors & center caps or not)

As you can see, the stock 2007 GT3 wheels were a good bit heavier, especially the rears. And as I've heard, the RG5 isn't Champion's lightest wheel.

Not sure what the weights for your wheels are, but you might look into that. Just something else to think about.