Turbohead

Hi Guys,
Has any body Tried 993TT Wheels on a C2 Turbo? I have eyeballed it on my car , It seems close as the offset brings the rears out a little more than the Speedlines. I plan to to use on track . Someone told me that turbo twists worked fine with 265/35/18s .But he wasn't sure if they were really TT wheels.

<img border="0" alt="[hiha]" title="" src="graemlins/roflmao.gif" />

Ian964

I think have 993TT wheels on my 965 Turbo, here is a picture.

&lt;img src="http://www.cs.rit.edu/~irr1449/porsche/ian%20017.jpg"&gt;
<img src="http://www.cs.rit.edu/~irr1449/porsche/ian%20017.jpg" alt=" - " />

I dont know how the tags work on this board. Cut and paste the link into a browser if this doesn't work.

Turbohead

Thanks Ian
Nice car What is the tire size ? Is your car lowered?
Elliot

Ian964

Yea its lowered. I don't know the tire size becuase I really just got it and then put it away for the winter. (only driven it 60 miles). I can go out and try and look tomorrow, is that on the side of the tire?

Turbohead

Ian,
Yes on the outside
Thanks
Elliot

oscar965

Look:

It works just fine.
These are 285/18 rear, and 225/18 front

<img src="http://home.planet.nl/~jooscomp/zijkant.jpg" alt=" - " />

Turbohead

Oscar,
Thanks you made my day!!
Elliot 3.6 turbo

Steve Shanks

Since there are many different part numbers for wheels, specifically what are the part numbers fitted and what are the offsets?

C4S

S-

IF the wheels above are OEM Factory 993TT Hollow Wheels I believe its:

8" x 18" - ET52 = 9050 grams / 19.95 lb.
993.362.136.00 - ET52 - 19.95 lb (front)

10" x 18" - ET40 = 11400 grams / 25.13 lb.
993.362.140.00 - ET40 - 25.13 lb (wide body rear)

C4S

S-

If the wheels above are OEM Factory 993TT Hollow Wheels I believe its:

8" x 18" - ET52 = 9050 grams / 19.95 lb.
993.362.136.00 - ET52 - 19.95 lb (front)

10" x 18" - ET40 = 11400 grams / 25.13 lb.
993.362.140.00 - ET40 - 25.13 lb (wide body rear)

(Viken on the 993 board posted this information.)

Steve Shanks

Eric,

Your post is exactly why I posted: .... If...

Oscar and Ian have "turbo twist" wheels on their cars. I'd like them or anyone else who has them fitted to confirm exactly what they have. Then there is no confusion.

As we all know, when it comes to wheel fitment on our cars, real life experiences are what counts.

Don't get me wrong, I had the information that you sent already and believe it is likely what they have fitted. However, I have not come across anyone with a c2t that has confirmed exactly what they have. I'm looking for "horse's mouth" confirmation before I consider the outlay on something like this.

fc-racer

Steve,

I tried on both the widebody 993 Turbo wheels and the narrow body 18" 993 wheels. The widebody wheels stuck out too far in the rear for my preference. You could probably make those work if you run lots of negative camber. I decided on the narrow body wheels which sit further in in the rear and look correct with where the fronts are.

The widebody wheels had an offset of +40mm, the narrow body wheels had an offset of +65mm so they sit further in by 25mm, just enough to make it look right. You can get the narrow body wheels in hollow spoke as well btw. I believe Porsche used a +61mm wheel in the rear for the 3.6 Turbo so the +65mm is pretty close, only 4mm further in.

You can see pics in my sig that show the wheel from the side, etc. I think you will be pleased with this choice. I am going to keep these for street use and probably buy some Cargraphic wheels for track use.

fc-racer

Steve Shanks

Ah, fc-racer,

What you say is true about the offset for the 3.6 wheels. However, my understanding from Adrian is that it is not an apples to apples comparison. The rear suspension geometry of the 3.6 differs from that of the 91-92. His book, when it is published, will elaborate.

In my case, the measurements I have done seem to bear out that something approaching 40 offset is best. Incidently, I run about 1.8 neg each side at the rear which is the most I can get out of it at my lowered height and get the optimum setting I want for rear toe in.

The concern for the 65 offset is the inside oil lines and potentially the body. As with the 40 offset on the outside, camber plays it's part.

Thanks for your real life experience. Do you happen to have saved part numbers for both the wide and narrow hollow spoke wheels? Also the non-hollow if you have them too.

TIA

Steve

Turbohead

Stteve ,
Ithink you are correct about the 3.6 having different rear dimmensions;however I'm not sure that it applies to US cars?.
Now I 'm still not sure if the TT hollow spokes will fit my 3.6 ,I plan on using 265/35/18's on the rears. Are the narrow body 993's also 10".?

Elliot 3.6 Turbo

Steve Shanks

Elliot,

Here's some information I've collected on wheels:

Stock 91-92 C2 turbo wheels
7x17 et55 - 965 362 124 00
9x17 et55 - 965 362 128 00

C2 turbo wheels from 968
7.5x17 et55 - 965 362 124 15
9.5x17 et68 - 965 362 128 05

1994 C2 turbo 3.6 wheels
8x18 et52
10x18 et 61

996 Turbo I Look 000.044.600.27
7.5x18 et50
10x18 et65 - 993.362.140.04??

996 Turbo Twist
996.332.136.04 8x18 et50
996.332.142.03 11x18 et45

993 Turbo Twist - Non Hollow
8x18 et52 - 993.362.136.01
10x18 et40 - 993.362.136.03

993 Turbo Twist - Hollow Spoke
8x18 et52 - 993.362.136.00
10x18 et40 - 993.362.140.00

Techart 964 Turbo recommendations
8JX17 front, 48mm offset
8.5JX17 front, 41mm offset
10JX17 rear, 48mm offset

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And here's some information I have collected in recent weeks from Tequipment catalogs:

Part Number Tequipment 911/993/996


000.043.203.61 18" Turbo I Continental SportContact
8x18 et52 225/40/18
10x18 et65 265/35/18

000.043.203.62 17" Sport Classic Continental SportContact
7x17 et55 205/50/17
9x17 et55 255/40/17

000.043.203.71 18" Sport Classic II Pirelli Pzero A
8x18 et52 225/40/18
10x18 et65 255/35/18

000.043.203.93 18" Turbo I Pirelli Pzero A
8x18 et52 225/40/18
10x18 et40 285/30/18

000.043.203.94 18" Sport Classic II Pirelli Pzero A
8x18 et52 225/40/18
10x18 et65 285/30/18

00.043.204.16 18" Sport Classic II Continental SportContact
7.5x18 et50 225/40/18
10x18 et65 265/35/18

00.043.204.25 18" Turbo I Continental SportContact
7.5x18 et50 225/40/18
10x18 et65 265/35/18

000.044.600.01 18" Sport Design Continental SportContact
7.5x18 et50 225/40/18
10x18 et65 265/35/18

000.044.600.04 18" Sport Classic II Pirelli Pzero A
8x18 et52 225/40/18
10x18 et65 285/30/18

000.044.600.06 18" Turbo I Pirelli Pzero A
8x18 et52 225/40/18
10x18 et65 265/35/18

000.044.600.08 18" Sport Design Pirelli Pzero A
8x18 et52 225/40/18
10x18 et65 285/30/18

000.044.600.09 18" Sport Design Continental SportContact
8x18 et52 225/40/18
10x18 et65 265/35/18

000.044.600.10 18" Sport Design Pirelli Pzero A
8x18 et52 225/40/18
10x18 et65 285/30/18

000.044.600.11 18" Turbo I Pirelli Pzero A
8x18 et52 225/40/18
10x18 et65 285/30/18

000.044.600.27 18" Turbo I (High Gloss) Pirelli Pzero A
7.5x18 et50 225/40/18
10x18 et65 265/35/18

------------------------------------

I'm of the same opinion as fc-racer that, for the 10" rears, the 40mm offset is too far out for the c2t. I think that somewhere between 50 and 65 works best for the cars based on measuring mine. I have 2.5" clearance on the inside of the rear right from the oil return line and so going with 65mm puts 1" more inside and none outside. A 7mm spacer would probably be optimal, making the offset about 58mm, that is in the middle of my range.

For the 8" front, the 52mm will be fine giving about 1/2" inside and outside. I already run 225 width tires on the front and would likely continue to do so. Therefore no rear impact here.

I'd still like more answers on what people are running for 8" and 10" offsets on these cars.