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Centerlocks - I'm out! ....Hello 5-lug conversion!

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Old 08-22-2011, 12:21 AM
  #31
BobbyC
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This IS the best effing news/thread ever for GT3 folks!!!!
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Old 08-22-2011, 01:23 AM
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no wasting a good malt on any heathens!
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Old 08-22-2011, 01:24 AM
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Originally Posted by BobbyC View Post
This IS the best effing news/thread ever for GT3 folks!!!!
doug for lifetime membership!
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Old 08-22-2011, 12:36 PM
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Originally Posted by Larry Cable View Post
no wasting a good malt on any heathens!
I hope your not referring to me as a heathen
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Old 08-22-2011, 01:15 PM
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you could've just... oh i dunno... sold the current car and picked up a prior gen and made yourself money instead of spending more


just thinking outside the box here
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Old 08-22-2011, 01:41 PM
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Originally Posted by trophy View Post
I hope your not referring to me as a heathen
in this case, the definition of "heathen" is someone who cant tell (or appreciate) the difference between a single malt, and a blended whisky; the latter being of primary application to clean open wounds or sterilized those parts affected by STDs!

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Old 08-22-2011, 01:43 PM
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Originally Posted by mdrums View Post
Call John at BGB Motorsports in Daytona...they do studs on all the Grand Am Porsches and know how to do the job...while you're there get a proper string alignment.
I was on one of the tours of the Brumos race shop during the Porsche parade in Savannah, and their Grand Am cup car was on a lift being prepared for WGI. It had what looked like a custom fabricated hub with 5 studs on it - looked just like the diagram above except with studs sticking out of it. . I now wish I'd shot a picture of it. Anyway, you might want to talk with them about what their solution was - or maybe BGB did it for them.
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Old 08-22-2011, 11:13 PM
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Originally Posted by }{arlequin View Post
you could've just... oh i dunno... sold the current car and picked up a prior gen and made yourself money instead of spending more


just thinking outside the box here

Well, I could......but I absolutely love my car (factory ordered it in fact, so its perfect).....I just don't find the CL's practical for my purposes, and I am happy to pay for something that suits me better. I should be able to minimize the hit by selling off my CL wheels and hub hardware.....I won't be reversing, ever!

Cheers!
Doug N
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Old 08-25-2011, 08:26 PM
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Doug N, great post. What wheels are you getting now for the 5-lug? Are you getting separate street & track wheels?
Thanks
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Old 08-25-2011, 08:37 PM
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Doug, the link for the studs shows 3 options, which size is correct, please?
M14x1.5 ACS 'Bullet Nose' race stud
71mm, 81mm, or 91mm????

http://www.race-studs.com/servlet/th...Nose%27/Detail

I am thinking of this solution for myself. Wondering if I can get all parts and install by 08.31.11 since I am scheduled to be at VIR for the weekend.
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Old 08-25-2011, 09:07 PM
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Doug! NOW you tell me you have a 60 bottle scotch collection...ahhhh!
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Old 08-26-2011, 12:24 AM
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Originally Posted by GT3DE View Post
Doug, the link for the studs shows 3 options, which size is correct, please?
M14x1.5 ACS 'Bullet Nose' race stud
71mm, 81mm, or 91mm????

http://www.race-studs.com/servlet/th...Nose%27/Detail

I am thinking of this solution for myself. Wondering if I can get all parts and install by 08.31.11 since I am scheduled to be at VIR for the weekend.
So GT3DE, what was the final outcome of your failure? Was the car fixed? Was it determined what led to the failure? There are many guys here keen to understand....
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Old 08-26-2011, 03:08 AM
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Originally Posted by }{arlequin View Post
you could've just... oh i dunno... sold the current car and picked up a prior gen and made yourself money instead of spending more


just thinking outside the box here
the 3.6 is in no way comparable to the 3.8. night and day.
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Old 08-26-2011, 06:40 AM
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Originally Posted by GT3DE View Post
Doug, the link for the studs shows 3 options, which size is correct, please?
M14x1.5 ACS 'Bullet Nose' race stud
71mm, 81mm, or 91mm????

http://www.race-studs.com/servlet/th...Nose%27/Detail

I am thinking of this solution for myself. Wondering if I can get all parts and install by 08.31.11 since I am scheduled to be at VIR for the weekend.
I had studs in my former 997 GT3 RS. I took out the crappy stuff mooty had there and put better ones, same brand race-studs, but without the bullet type tips which I regret as the bullet type tips are even more convenient.

Buy the 81mm ones.

Here are the dimensions used:

12mm bolted to the hub + 5mm to clear rotor hat + 10mm to clear stock wheels + 20mm to clear the steel lug nut + 20mm on the bullet tip = 67mm.

Right, you should be fine with 71mm ones, but the problem is that CCW, Fikse, HRE use a little more space for the wheel center, JongBloed goes to 15mm, so with 71mm studs and aftermarket wheels you will end up unable to have lug nuts fully threaded on the stud. Sometimes I use spacers to compensate for wider tires or different than stock offsets, you cannot add even a factory 5mm spacer to the 71mm studs.

The 91mm would be fine as well, but they don't have any gains, as they are not long enough to use the BBS Magnesium wheels (lightest wheels made for a 996/997) which use a 35mm center. So, they will stick out more and not give you any benefit.

Aesthetically, you won't notice the 81mm bullet type studs.

Here are the links to CDOC. Check this video. In addition to their instructions, use Red Loctite on the stud thread that bolts to the hub when installing them. You will love having studs.

Buy 25 studs and 25 lug nuts. Keep 5 pairs as spares.

http://store.cdoc.com/track-studswheelstud-1.aspx

http://store.cdoc.com/lugnutsteel.aspx

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Old 08-26-2011, 10:40 AM
  #45
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Hey NJ_GT,

Thanks for stud install info (that is handy and damn good timing too!) and for writing out the calc's, they are spot on!!!

I am planning to run custom built Forgeline wheels (GAR3Rs in 19 inch sizing with perfect offsets - so no spacers will be used ever) and found that the 71mm studs will fit nicely with a couple or three millimeters of thread to spare.

NOTE FOR ALL:

The conversion has begun.....wheel carriers are out and the CL hubs will be pressed out later today or tomorrow.....then the 5-lug hubs and new bearings will be installed and reassembly will begin......I hope to have an update on Monday Aug 29th.


Cheers!
Doug N

Last edited by DJN; 08-26-2011 at 11:10 AM.
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