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Fitting Cup 2's

M

mbrook

PCGB Member
Member
Gentlemen,

I've just aquired some 17" Cup 2 wheels to replace my 16" D90's. The question to anyone who has fitted these wheels is, can I put 'em straight on without spacers? If not, what size spacer do I need to fit, and where did you buy them from please. My D90's are 6Jx16 and 8Jx16 with 52 offset, and the Cups(993 version) are 7Jx17 and 9Jx17 both with 55 offset.

Thanks in advance,

Mark.
 
They should fit straight on, no problem.

I had some identical ones on my old 964 C4 many years ago, same widths and offsets
 
Thanks Nick, I was just a little worried about that £400 oil pipe getting rubbed!

Cheers,

Mark.
 
ORIGINAL: mbrook

Thanks Nick, I was just a little worried about that £400 oil pipe getting rubbed!

Cheers,

Mark.
Click to expand...

It will if it's not been flattened. Have you had a new one that's not received this treatment?
 
Steve,

Mine's a new (ish) one, and I'm pretty sure it's not flattened - infact I think it's all rubber, so round.
Nice write up on your re-build by the way. Your car certainly seemed fast enough when you took
me for a few laps of Curborough! Although maybe I just drive like an old bird!

M


 
Hmm, my old C4 had a flattened pipe come to think of it, as does/did my Dad's C2 that also had the Cup 2s fitted latterly.
 
So I guess it'll be ok to fit them if my pipe is flattened, or use a 5mm spacer if it's not?
 
Mark, the oil pipe to the thermostat is some sort of steel alloy at each end but the main section is a malleable metal - I've no idea what it's made of but I can see why you think it might look like rubber. Mine has already been flattened as I guess most have. I believe they're flattened by nothing more sophisticated than using a rubber mallet. If a Porsche centre or indy fitted the line for you, I'm surprised they didn't do it as part of the fitting. I'm sure an indy would be happy to bash the pipe flat if you're worried about doing it yourself.

Even with my flattened pipe I've moved to running with 3 mm shims because on track days there is so much tyre movement that my 55 offset wheels still rub the pipe. You can use up to 10 mm spacers at the rear (with the wheels you have) without worrying about the tyres catching the wheel arch. But remember that big spacers need to be used with longer studs or you need to use the bolt on type of spacer.
 
Steve,

Can ou remember where you got your spacers from please? I've just got some from Euro Car Parts
labelled as 'universal', jacked my car up and took the wheels off and discovered my hub is 20mm bigger
than the shims, so they don't fit....... Very annoying!!!

Cheers,

Mark.
 
Mark I bought mine from Porscheshop. They only supply spacers for Porsche fitment so you should get the right ones if you buy from them:

http://www.porscheshop.co.uk/acatalog/wheel_spacers_shims_for_porsche.html

p.s. I bought the 5 hole style that are further down the page linked above.
 
Now you have all got me thinking about my oil pipes. What I do not understand is these wheels were an option on my car.1993 C2 and I cannot believe that there were different oil pipes with a factory optional wheel. The only thing I have heard is that the steering lock stops on the track rod should be of the thick or thinner type because of the larger dia wheel (17inch) cannot remember which it is but because my car is a late one there was no issue.
 
Keith, if your larger wheels were fitted at the factory, they would have also flattened the oil pipe before fitting them. When we say flattened, it's more of an oval shape. How Porsche had the foresight to fit an oil line that could be altered to suit, is another question. [:D]
 
Steve when I say they were an option, I meant that the option was available. The car came with 16inch standard alloys. I have fitted the 17 inch cup 2 wheels with 15mm spacers on the rear so may be the issue of modifying the pipes is not a concern
 
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