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 )

 
 Reply to this topicStart new topic
> Legal to make "holes" in roll bar for PCA or SCCA?, picture of intended mod:
Mueller
post Aug 2 2005, 07:06 PM
Post #1


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

Group: Members
Posts: 17,155
Joined: 4-January 03
From: Antioch, CA
Member No.: 87
Region Association: None
Had a full cage on my last car done by Tony at TC Design , with my new car, I just want a roll bar as outlined in the red...however, I'd like to have a removable petty bar(to be installed at the auto-x course or track)

what I am trying to figure out is whether or not it's acceptable to drill thru holes and weld in strenghtening tubes into the rollbar for the hardware to pass thru.



Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mueller
post Aug 2 2005, 07:06 PM
Post #2


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

Group: Members
Posts: 17,155
Joined: 4-January 03
From: Antioch, CA
Member No.: 87
Region Association: None
opps...forgot the outline picture....


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
URY914
post Aug 2 2005, 07:44 PM
Post #3


I built the lightest 914 in the history of mankind.
****************************************************************************************************

Group: Members
Posts: 126,350
Joined: 3-February 03
From: Jacksonville, FL
Member No.: 222
Region Association: None
I had holes like that in my main hoop and made it thru a PCA tech inspection.
Depends on how close they look.

P
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mueller
post Aug 2 2005, 08:05 PM
Post #4


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

Group: Members
Posts: 17,155
Joined: 4-January 03
From: Antioch, CA
Member No.: 87
Region Association: None
the petty bar would mount with something similar to this...


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Howard
post Aug 2 2005, 08:17 PM
Post #5


Incontin(g)ent Member
*****

Group: Benefactors
Posts: 5,785
Joined: 24-July 03
From: Westlake Village, CA
Member No.: 943
Region Association: None
OK in POC. But mine had larger diam sleeves at the 'joints'. Bolted thru both.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mueller
post Aug 2 2005, 08:21 PM
Post #6


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

Group: Members
Posts: 17,155
Joined: 4-January 03
From: Antioch, CA
Member No.: 87
Region Association: None
QUOTE (Howard @ Aug 2 2005, 07:17 PM)
OK in POC. But mine had larger diam sleeves at the 'joints'. Bolted thru both.

so the "sleeves" just stayed on when the bar was removed?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Howard
post Aug 2 2005, 08:29 PM
Post #7


Incontin(g)ent Member
*****

Group: Benefactors
Posts: 5,785
Joined: 24-July 03
From: Westlake Village, CA
Member No.: 943
Region Association: None
No, wish I had a better picture (took cage out). Sawed thru the main bar. Cut larger diam sleeve. Drilled both. Bolted back together.
Then unbolt, remove center section and sleeves. Stub was covered with foam for street use.


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ChrisFoley
post Aug 2 2005, 09:35 PM
Post #8


I am Tangerine Racing
*****

Group: Members
Posts: 7,986
Joined: 29-January 03
From: Bolton, CT
Member No.: 209
Region Association: None
If you do it such that there is no perceived weakness there should be no problem. Your idea of welded in sleeves for the bolts to pass through looks fine to me.
The GCR has pictures of a couple of acceptable methods of bolt together joints. I think you can access the GCR online at SCCAdotcom.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
MattR
post Aug 2 2005, 09:54 PM
Post #9


Advanced Member
****

Group: Members
Posts: 3,279
Joined: 23-January 04
From: SF Bay Area
Member No.: 1,589
Region Association: Northern California
Why not weld on a bracket?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mueller
post Aug 3 2005, 12:07 AM
Post #10


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

Group: Members
Posts: 17,155
Joined: 4-January 03
From: Antioch, CA
Member No.: 87
Region Association: None
QUOTE (MattR @ Aug 2 2005, 08:54 PM)
Why not weld on a bracket?

I could, I want to avoid the "normal" type of bracket which protrudes into the cabin. Ideally you want the axis of the petty bar to line up with the centerline of the mating tube.

I'm betting that just about any design (as long as it's safe and strong) will be sufficient and better than not having anything at all....I was just fishing to see if anyone had done something "different" (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
mikerose
post Aug 3 2005, 08:06 AM
Post #11


Happy to be back
***

Group: Members
Posts: 657
Joined: 31-December 02
From: Pittsburg,ca
Member No.: 60
Region Association: None
Hi Mike like this

(IMG:http://www.914world.com/bbs2/html/emoticons/cool_shades.gif)


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
mikerose
post Aug 3 2005, 08:08 AM
Post #12


Happy to be back
***

Group: Members
Posts: 657
Joined: 31-December 02
From: Pittsburg,ca
Member No.: 60
Region Association: None
More


(IMG:http://www.914world.com/bbs2/html/emoticons/cool_shades.gif)


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
mikerose
post Aug 3 2005, 08:09 AM
Post #13


Happy to be back
***

Group: Members
Posts: 657
Joined: 31-December 02
From: Pittsburg,ca
Member No.: 60
Region Association: None
(IMG:http://www.914world.com/bbs2/html/emoticons/cool_shades.gif)


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
mikerose
post Aug 3 2005, 08:11 AM
Post #14


Happy to be back
***

Group: Members
Posts: 657
Joined: 31-December 02
From: Pittsburg,ca
Member No.: 60
Region Association: None
(IMG:http://www.914world.com/bbs2/html/emoticons/cool_shades.gif)


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Brett W
post Aug 3 2005, 09:06 AM
Post #15


Advanced Member
****

Group: Members
Posts: 2,859
Joined: 17-September 03
From: huntsville, al
Member No.: 1,169
Region Association: None
You can make the holes as long as you make a bushing that you can weld into the tube. Check out how this car was done:
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Brett W
post Aug 3 2005, 09:08 AM
Post #16


Advanced Member
****

Group: Members
Posts: 2,859
Joined: 17-September 03
From: huntsville, al
Member No.: 1,169
Region Association: None
damn forgot to add the pic.



Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Terrance
post Aug 3 2005, 07:10 PM
Post #17


Member
**

Group: Members
Posts: 125
Joined: 2-August 05
From: Milpitas, CA
Member No.: 4,526
Mike, you can do it as stated somewhere above. Just need a "bushing". I think it's the recomended way to do it anyways.

I might have a pic somewhere
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: Standard · Switch to: Linear+ · Switch to: Outline

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

- Lo-Fi Version Time is now: 9th May 2025 - 03:44 PM
Invision Power Board v9.1.4 © 2025  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 ...