 Rollcage "petty bar", Have to remove it - advice needed |
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| campbellcj |
  Feb 11 2006, 03:17 PM
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#1
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I can't Re Member  Group: Members Posts: 4,549 Joined: 26-December 02 From: Agoura, CA Member No.: 21 Region Association: Southern California 
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POC has a rule against passengers (instructors/students) riding in the car if there is a cage tube crossing their 'space'. Apparently there was a fatal crash years ago where contact with this type of bar was deemed to be a factor, so they are not at all flexible on this rule.
Sooo...my choices are to either make it removable, or just ditch it entirely. Will making it removable negate the extra stiffness added by this bar? If so then I wouldn't bother. In that case, what is the best way to remove a welded bar like this? I sure don't want to have to redo a significant portion of the cage. Is it OK to just cut it out and then grind down the welds? I am kind of inclined to just ditch this bar and perhaps add some more tubing to the chassis & pickup points to add more stiffness. In the POC points-based classification system this is only 1 pt IIRC and I think I can 'afford' it class-wise. Any advice appreciated. |
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Replies(1 - 7)
| DanT |
Feb 11 2006, 03:23 PM
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#2
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Going back to the Dark Side! Group: Members Posts: 4,300 Joined: 4-October 04 From: Auburn, CA Member No.: 2,880 Region Association: None |
My car has a removable petty bar. I would go with that set up since it does give some front to rear stiffness.
Does you car currently have a full cage. If so I would can the petty bar. (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) |
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| campbellcj |
Feb 11 2006, 03:36 PM
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#3
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I can't Re Member Group: Members Posts: 4,549 Joined: 26-December 02 From: Agoura, CA Member No.: 21 Region Association: Southern California
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Sorry I forgot to clarify; yes it has a welded 1.5" 8-point cage, built by TonyC about 3 yrs ago. Currently there are no tubes outside of the cockpit.
Dan - what kind of hardware/connectors are used in your removable bar? Is it reasonably easy to remove/reinstall? |
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| DanT |
Feb 11 2006, 03:41 PM
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#4
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Going back to the Dark Side! Group: Members Posts: 4,300 Joined: 4-October 04 From: Auburn, CA Member No.: 2,880 Region Association: None |
foot plate and backing plate with 2 bolts on floor and one bolt onto middle of hoop with welded tabs to attach to bar.
It is easy in and out...although I never take it out unless the wifey wants to go for a ride in the twisties....that doesn't happen very often since my other car is a Boxster...she likes that a lot more than the 914. Can't blame her for a cruiser. If you have a TC cage....ditch the petty bar IMHO |
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| SirAndy |
Feb 11 2006, 03:47 PM
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#5
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Resident German Group: Admin Posts: 41,676 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
if clouded memory serves me, TonyC advised me against a welded in petty bar back when he did my cage.
i opted to not have a petty bar at all, but if i ever decide to get one, it will be removable ... (IMG:http://www.914world.com/bbs2/html/emoticons/cool.gif) Andy |
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| ChrisFoley |
Feb 12 2006, 07:19 AM
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#6
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I am Tangerine Racing Group: Members Posts: 7,934 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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Cut as close to the ends as you can with a sawzall, then grind away the remainder. If you nick (deeply) one of the remaining tubes I would fill that with weld and grind smooth.
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| Trekkor |
Feb 12 2006, 12:09 PM
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#7
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I do things... Group: Members Posts: 7,809 Joined: 2-December 03 From: Napa, Ca Member No.: 1,413 Region Association: Northern California |
I would like to ADD a removable petty bar.
Can you leave a couple of inches in the car on each end and weld on thick mounting tabs? Then do the same on the sectioned piece once it's fitted to the tabs. What tube stock should be used for an add on? KT |
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| campbellcj |
Feb 12 2006, 01:09 PM
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#8
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I can't Re Member Group: Members Posts: 4,549 Joined: 26-December 02 From: Agoura, CA Member No.: 21 Region Association: Southern California
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TonyC has some "trick" tube connectors that I remember seeing a couple years ago; maybe he or Brad posted a pic here. I figure the POC tech weenies might not like the protruding stubs when the petty bar is out. I'm just gonna ditch the bar...thanks Chris for confirming it's OK to cut/grind it out as long as I'm careful not to damage the remaining tubes. |
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