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  #11  
Old 01-03-2012, 12:30 PM
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The price differential is pretty huge, not that the Cayman is an outstanding value, but still.
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  #12  
Old 01-03-2012, 01:35 PM
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Originally Posted by turtl631 View Post
The price differential is pretty huge, not that the Cayman is an outstanding value, but still.
It's almost half the cost of a 911, kinda crazy to think for 9/10 the car.
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Old 01-03-2012, 01:52 PM
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not to mention the motor is on the correct side of the transaxle....
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Old 01-03-2012, 05:56 PM
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I totally understand what you mean with the tubes being welded to the rocker panel, but again these are examples were some of the ruling doesn't allow for attachment of the cage to the chassis in places like that. On the normal cars he actually continues the verticle tubes down to the rockers. It's crazy the amount of rulebooks and regulation regarding cage stuff across the many different sanctioning bodies and run groups...perplexing that there isn't a 'standard' yet.

I do know though that while those bars are not perfect, they do work. The first Cayman he ever did got wild up through the bus-stop at the Glen and collided with the wall...the bars worked just as intended by helping bounce the car a little. Driver never even had the bars touch him.



It's gotta be true, as Jay has done a considerable amount more Caymans this year/last year than 911's...can't blame guys as they are a great little car.
My big issue with this particular installation is the door bars have two huge- nearly 90 deg bends right where it needs to be strongest. If the main hoop was moved forward a touch (dependent on the location of the seats) and/or the door frame was notched a tad for the cage, you could make those an almost straight run to the main hoop and regain a ton of strength there.
http://blehmco.com/pics/240SX/roll_cage/DSCN0215.jpg
http://blehmco.com/pics/240SX/roll_cage/DSCN0218.jpg

My door bars don't protrude nearly as far into the door and the bottom tube is much straighter (almost straight).. The top tube still has the same issue, but to a MUCH lesser degree. There was plenty of room in mine to have slightly bent or notched the door frame to make the tube have a straight run into the main hoop. Even with that, you can see how much room there is between the door bars and my seat in those shots. By the time the cage deforms enough to hit my seat, I'm going to have other problems anyway. (i.e. neck/back injuries)
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Old 01-03-2012, 09:02 PM
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Not disagreeing with the comments, but you need to consider the class they run in, the rules, and the associated tech. With the cup cars there are additional bars welded to the rocker (like a real nascar) and so forth, but on the ones wehere you can't cut the body an you can't attach them, this is the norm (not even just for him, with most Cayman/911 guys). I know on paper it may not be right (and this may be the worst way to view safety, but it's the only reference) but no one has gotten remotely close to being hurt by the bars in an accident where impact involved the 'Nascar' Bars.

It's a matter of perfection vs the rules vs nothing at all. I personally would go with a traditional X door brace, or a real nascar bar but it's been proven time and time again that even these "2/3" Nascar bars help deflect/bounce the car and work as a slight crumble zone to absorb impact, and generally work very well.
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  #16  
Old 01-03-2012, 09:44 PM
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Agreed on all counts. Generally, there are provisions in the rules to allow for modifying the body to fit the cage like what I'm talking about, unless you're in a pretty basic class. i.e. SCCA Improved Touring or Showroom Stock. anything beyond that in SCCA has a pretty open cage rule, and anyone racing a Porsche in SCCA is going to be in one of those classes-- unless you're racing an old 944...

anyway, yeah. IT cars aren't allowed to strengthen the chassis with the cage, but they're allowed to do things like trim the door frame "in the name of safety" to install door bars and such. A huge percentage of the time, the local tech guys will look sideways at you and then let it pass, as it's not worth sending a paying customer packing for something that really doesn't affect the performance and improves safety.
.. But that's speaking in idealistic terms.
I've seen a few cases of egregious rules violations (like a gusseted cage on an IT car), where the car was not allowed to race and sent packing because of the cage. But that's VERY few and far between once you get out of LeMons or Chump car and the cars are most often built by a handfull of local cage builders that all know the local tech guys.

When I took my car in for my first annual tech, the inspector opened the door and asked "Did Greg Lucas build your cage? Looks like his work."
"Yessir. had it done about a year ago by him."
"Okay. I won't bother with crawling around then since he does good, legal work. Just need to give it a once-over and look for corrosion, then measure the tubing to say I did it."
He spent about 5 min actually looking at the cage, and more time than that asking me about lugnuts, wheel studs, and the last time I replaced my bearings.
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