Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

> Rear hub mods?, Looking for suggestions
MartyYeoman
post Jan 19 2007, 02:20 PM
Post #1


Senior Member
***

Group: Members
Posts: 1,519
Joined: 19-June 03
From: San Ramon, CA
Member No.: 839
Region Association: Northern California
To all:

I'm currently in the process of renewing both rear axles replacing all CV joints, boots, and bearings.
I'm at the point where I have the the hubs (four bolt) out and want to know what I can do to them to provide myself 5 bolt options in the future. Here are some of my thoughts:

1) Drill and tap five bolt pattern into hub flange. This seems weak to me. Not enough wheel bolt engagement on the five bolt pattern.

2) Drill five bolt pattern, spotface rear of hub and install threaded boss to add thread depth to match four bolt pattern. Probably press fit with keeper keys to prevent rotation.

3) Forget about options and reinstall existing hubs unchanged.

Personally I like idea two the best.

What do you think??
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
 
 Reply to this topicStart new topic
Replies(1 - 18)
914nerd
post Jan 19 2007, 02:32 PM
Post #2


Who you callin' a "Member"?
**

Group: Members
Posts: 416
Joined: 18-July 06
From: Los Alamos, NM
Member No.: 6,461
Look up Eric Shea in the member vendors section
He sells 5-lug converted hubs that look to be quite well done and he has a good reputation around here
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mueller
post Jan 19 2007, 02:44 PM
Post #3


914 Freak!
***************

Group: Members
Posts: 17,146
Joined: 4-January 03
From: Antioch, CA
Member No.: 87
Region Association: None
QUOTE(914nerd @ Jan 19 2007, 12:32 PM) *

Look up Eric Shea in the member vendors section
He sells 5-lug converted hubs that look to be quite well done and he has a good reputation around here


Marty is a professional designer/machinest, I know he is capable of doing the mods (IMG:style_emoticons/default/smile.gif)



Marty, I'd opt for #2 or #3...the problem with #2 is whether or not you'll have enough room to access on the farside to install the studs when the assembly is complete. I think Andy mentioned he once installed studs into his hubs while they were on the trailing arms. Another problem with #2 is ensuring that you get the studs perfectly perp. with the hub to wheel mounting surface. I think I'll be able to drop off the CV's this sat.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
914nerd
post Jan 19 2007, 02:47 PM
Post #4


Who you callin' a "Member"?
**

Group: Members
Posts: 416
Joined: 18-July 06
From: Los Alamos, NM
Member No.: 6,461
Well, given that piece of information, #2 if you reallly want the 5-lug and #3 if you don't really want them
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
MartyYeoman
post Jan 19 2007, 02:53 PM
Post #5


Senior Member
***

Group: Members
Posts: 1,519
Joined: 19-June 03
From: San Ramon, CA
Member No.: 839
Region Association: Northern California
I just took a look at Eric's converted hub's. He has studs installed and I was thinking of only adding additional threaded holes to allow either four or five bolt wheels to bolt up. Are lug bolts an issue with five bolt wheels? Is there a reason to only use studs?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mueller
post Jan 19 2007, 03:03 PM
Post #6


914 Freak!
***************

Group: Members
Posts: 17,146
Joined: 4-January 03
From: Antioch, CA
Member No.: 87
Region Association: None
QUOTE(Marty Yeoman @ Jan 19 2007, 12:53 PM) *

I just took a look at Eric's converted hub's. He has studs installed and I was thinking of only adding additional threaded holes to allow either four or five bolt wheels to bolt up. Are lug bolts an issue with five bolt wheels? Is there a reason to only use studs?


new Porsches use bolts, my 3300 pound Volvo uses bolts....one threaded hole will remain common between the 4 lug and 5 lug, but there will be one that is pretty close (do a layout with your CAD system using 14mm holes and you'll see how close)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Aaron Cox
post Jan 19 2007, 03:59 PM
Post #7


Professional Lawn Dart
***************

Group: Retired Admin
Posts: 24,541
Joined: 1-February 03
From: OC
Member No.: 219
Region Association: Southern California
eric spot faces and uses 7mm bosses... tacked onto the hub.

press the stud into the boss and blammo... same engagement depth as 911 hubs and 914/6 and early 914 hubs....

AA
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
John
post Jan 19 2007, 04:32 PM
Post #8


member? what's a member?
****

Group: Members
Posts: 3,393
Joined: 30-January 04
From: Evansville, IN (SIRPCA)
Member No.: 1,615
Region Association: None
I like the studded hubs.

A. they hold the wheel up while you start the firs lug nut
B. they allow you to visually know how many threads are engaged with the nut (if using the steel nuts)

C. they can be replaced if one gets boogered (threaded holes are harder to replace)
D. it's just the right thing to do.

I like eric's hubs. I just prefer 911 hubs. (I still never recieved those, damn Post Office)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
plas76targa
post Jan 19 2007, 04:54 PM
Post #9


Senior Member
***

Group: Members
Posts: 885
Joined: 22-February 04
From: Frederick, MD
Member No.: 1,700
Region Association: MidAtlantic Region
Hi Marty! (IMG:style_emoticons/default/hijacked.gif)

ditto what Aaron said. he put it better words than I could.

Eric had a nice post on the drilling the hubs and the welded additions. Forgive for not looking it up to add here.

All's fair on the east coast.

Matt
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post Jan 19 2007, 05:07 PM
Post #10


914 Freak!
***************

Group: Retired Admin
Posts: 20,179
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None
Huh.... Universal hubs would be interesting. Unbolt the four lug, bolt up a five lug. (IMG:style_emoticons/default/idea.gif)

I have some boxster five lug wheels you can borrow indefinitely. You'll need to find spacers to run them, but they'll fit stock fenders.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
914werke
post Jan 19 2007, 07:30 PM
Post #11


"I got blisters on me fingers"
**********

Group: Members
Posts: 10,062
Joined: 22-March 03
From: USofA
Member No.: 453
Region Association: Pacific Northwest
(IMG:style_emoticons/default/confused24.gif) waste of time .

Ill sell you a set that are already drilled and include the alloy bolts (IMG:style_emoticons/default/smile.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Aaron Cox
post Jan 19 2007, 07:31 PM
Post #12


Professional Lawn Dart
***************

Group: Retired Admin
Posts: 24,541
Joined: 1-February 03
From: OC
Member No.: 219
Region Association: Southern California
they cant be universal...

youhave to press a stud thru one of the originalholes.... that means you have to ream out those threads.....
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Eric_Shea
post Jan 19 2007, 07:37 PM
Post #13


PMB Performance
***************

Group: Admin
Posts: 19,275
Joined: 3-September 03
From: Salt Lake City, UT
Member No.: 1,110
Region Association: Rocky Mountains
Mike I've sent a couple e-mails. Are you available? I don't have my database with your phone number. Can you let me know CV status?

Aa, I think they're talking about 4-5 "threaded" hubs... cool idea. Rotor would have to be drilled to match.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Aaron Cox
post Jan 19 2007, 07:43 PM
Post #14


Professional Lawn Dart
***************

Group: Retired Admin
Posts: 24,541
Joined: 1-February 03
From: OC
Member No.: 219
Region Association: Southern California
QUOTE(Eric_Shea @ Jan 19 2007, 05:37 PM) *

Mike I've sent a couple e-mails. Are you available? I don't have my database with your phone number. Can you let me know CV status?

Aa, I think they're talking about 4-5 "threaded" hubs... cool idea. Rotor would have to be drilled to match.


OHHHH!!!

why? LOL

btw... why not use /6 rotors?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Eric_Shea
post Jan 19 2007, 07:44 PM
Post #15


PMB Performance
***************

Group: Admin
Posts: 19,275
Joined: 3-September 03
From: Salt Lake City, UT
Member No.: 1,110
Region Association: Rocky Mountains
well... in that example you wouldn't be able to go back to 4-lug. (IMG:style_emoticons/default/wink.gif)

(switch back and forth)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Aaron Cox
post Jan 19 2007, 08:09 PM
Post #16


Professional Lawn Dart
***************

Group: Retired Admin
Posts: 24,541
Joined: 1-February 03
From: OC
Member No.: 219
Region Association: Southern California
QUOTE(Eric_Shea @ Jan 19 2007, 05:44 PM) *

well... in that example you wouldn't be able to go back to 4-lug. (IMG:style_emoticons/default/wink.gif)

(switch back and forth)


you are a closet transvestite arent you....
(switch back and forth)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
MartyYeoman
post Jan 19 2007, 09:11 PM
Post #17


Senior Member
***

Group: Members
Posts: 1,519
Joined: 19-June 03
From: San Ramon, CA
Member No.: 839
Region Association: Northern California
QUOTE(McMark @ Jan 19 2007, 03:07 PM) *

I have some boxster five lug wheels you can borrow indefinitely. You'll need to find spacers to run them, but they'll fit stock fenders.

Thanks for the offer Mark. I will definitely keep it in mind. (IMG:style_emoticons/default/clap56.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
MartyYeoman
post Feb 10 2007, 08:36 PM
Post #18


Senior Member
***

Group: Members
Posts: 1,519
Joined: 19-June 03
From: San Ramon, CA
Member No.: 839
Region Association: Northern California
Just finished these. Now I can go either way. (Four or Five lug that is.)Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
John
post Feb 10 2007, 09:42 PM
Post #19


member? what's a member?
****

Group: Members
Posts: 3,393
Joined: 30-January 04
From: Evansville, IN (SIRPCA)
Member No.: 1,615
Region Association: None
Well for that to work out for you, you will still need to custom drill every rear rotor that you buy for the car. With a shared hole, you could have used a standard 914-6 or 911 vented rear brake rotor (the screw holes would line up).

It would still be cool to be able to use 4-lug OR 5-lug wheels without changing setups. It could mess with some heads until they see your secret.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Switch to: Standard · Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 17th May 2024 - 03:27 AM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...