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+--- Thread: X-Brace or NASCAR Bars? (/showthread.php?tid=9415)
X-Brace or NASCAR Bars? - D_Eclipse9916 - 05-02-2011
So I have a date with Carlos on June 20th to start building the roll cage into the m3. After lots of discussion and calls with multiple cage builders, im still kinda...eh..I dont know. Opinions? Observations?
NASCAR Bar
Pros:
Easy exit and entry (emergency situations and day to day)
Better side impact protection with room between you and cage
Looks cool?
Negatives:
Apparently not as strong "cage" with nascar bars instead of X-brace
More expensive
More weight
X-brace
Pros:
Required rules by a lot of organizations have x-braces, no mention of NASCAR bars
Apparently as a whole the cage is more "stiff" than an X-brace, but Carlos said it was semantics, the difference would be enough hit that youd be done anyway simply because of the forces involved.
Costs less
Negs:
Difficult to get in and out of
Not as pretty? :dunno:
Re: X-Brace or NASCAR Bars? - .RJ - 05-02-2011
Make a hybrid of sorts, and x-brace that bows outwards at the top into the door.
Re: X-Brace or NASCAR Bars? - Kaan - 05-02-2011
.RJ Wrote:Make a hybrid of sorts, and x-brace that bows outwards at the top into the door.
RJs cage was nice. that door set up he had is legal now and i dont think it make it hard to get in and out of the car.
Re: X-Brace or NASCAR Bars? - .RJ - 05-02-2011
Yep, Piper made the cage for me. If boostrot wasnt broken then I'd post pictures (Hi John!)
Re: X-Brace or NASCAR Bars? - Evan - 06-16-2011
I like to keep the impact as far away, with as much time/space to crumple and absorb energy as I can.
"not as stiff" is something made up by some internet forum moron. there is no quantifiable difference in stiffness and when you see how big and fat the bars are you will agree.
if youre really obsessed with this then do the nascar bars plus a straight bar along the floorboards.
i didnt like RJ's design from an engineering perspective. any corner is inherently weak by design, especially if its a weld point.
Re: X-Brace or NASCAR Bars? - D_Eclipse9916 - 06-16-2011
Thanks guys, and yeah I ended up going with NASCAR bars on the driver's side, x-brace on passenger side. After reviewing the cage with Carlos, im liking the structure he builds for a NASCAR bar.
The x-braces I dont like as much unless they are heavily gusseted, seen many a cage failure pictures with x-braces that looks way worse than failures of nascar bars. That said, all the WRC guys use modified X-braces with heavy gussetting.
Car goes to get cage installed monday!
Re: X-Brace or NASCAR Bars? - Apoc - 06-16-2011
Don't see many t-bones in WRC.
Re: X-Brace or NASCAR Bars? - D_Eclipse9916 - 06-16-2011
Apoc Wrote:Don't see many t-bones in WRC.
Trees??? signs?? I guess nothing as big as another car but still.
Re: X-Brace or NASCAR Bars? - Apoc - 06-16-2011
D_Eclipse9916 Wrote:Apoc Wrote:Don't see many t-bones in WRC.
Trees??? signs?? I guess nothing as big as another car but still.
All vertical and not likely to intrude a car the way the nose of another car does. Sliding into a tree has dramatically different physics than a car ramming your driver's door at 80 mph. What's likely to injure you more? Me whacking you with a stick or stabbing you with it?
Re: X-Brace or NASCAR Bars? - Mike - 06-16-2011
stab me with it. now.
Re: X-Brace or NASCAR Bars? - Evan - 06-16-2011
WRC also uses very small diameter tubing, funky monkey bar designs and no bar padding. Not exactly a saftey model to use
Considering they used to use aluminum for rollcages before they started killing people, Im not sure WRC has the right approach to saftey to begin with.