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  Topic Review (Newest First)
12-14-2012 08:36 AM
mikelr
Quote:
Originally Posted by kmt63 View Post
the forward mounting point is riveted and bonded in.then the tubes are welded into these points.i seam to remember kurt welding his kit onto the stock roll bar.but im not sure on that.
Don't mean to resurrect such an old thread but good info is good info...

Kurts cage design replaces the stock main hoop, the fact that the factory hoop is not one continuous piece of tubing but a combination of welded tube in different diameters makes it not legal for SCCA/NASA, not sure what the stock bar wall thickness is but that might exclude it as well. The main hoop on my S1 was one piece so I first thought I would build off that but the wall thickness was too thin so it had to be replaced with tube meeting the rule book.

I see that R3 hasn't responded with how much the cage weighs, that's unfortunate but as you can see it is similar to the cage I built for my S1 which weighed in at 79lbs.

04-21-2010 07:45 AM
kmt63
Quote:
Originally Posted by ageshelin View Post
TIG MIG or SHTIG you CANNOT weld steel to aluminum. Therefore, all SCCA legal cages for Elise/Exige that do not required destructive testing, as per regulations, have to be bolted in. How you do the bolting-in is a very interesting question. If the cage is designed properly, it would significantly increase the stiffness of the chassis.

The question about testing is mute. SCCA mandates a certain steel design. They know it works, the tube diameter and thickness is all spec'd out. So are the main hoops and bars. The trick is to use chrome-moly to make it even lighter or stiffer. Most people do not spend the $$ and use mild steel. It has some advantages, as well i.e. does not sheer with sharp edges most of the time.

Anton
the forward mounting point is riveted and bonded in.then the tubes are welded into these points.i seam to remember kurt welding his kit onto the stock roll bar.but im not sure on that.
04-21-2010 07:43 AM
Green Hornet Any Suggestions?

Who would be a qualified, experienced installer in the Northeast?
04-21-2010 04:32 AM
holmz
Quote:
Originally Posted by ageshelin View Post
...The trick is to use chrome-moly to make it even lighter or stiffer. Most people do not spend the $$ and use mild steel. It has some advantages, as well i.e. does not sheer with sharp edges most of the time.
All variety of steels have about the same stiffness.
You could make it stronger, or lighter, but a heavy mild-steel would be stiffer than a light weight chromoly.
Not that it would matter - it is already has a stiff chassis.

Would be interested in the weight, and if it available unwelded.
Even better would be one that can attach to the existing hoop, as they are removable. They are bolted to the hoop.
04-20-2010 06:18 PM
ageshelin
How can they be welded in

TIG MIG or SHTIG you CANNOT weld steel to aluminum. Therefore, all SCCA legal cages for Elise/Exige that do not required destructive testing, as per regulations, have to be bolted in. How you do the bolting-in is a very interesting question. If the cage is designed properly, it would significantly increase the stiffness of the chassis.

The question about testing is mute. SCCA mandates a certain steel design. They know it works, the tube diameter and thickness is all spec'd out. So are the main hoops and bars. The trick is to use chrome-moly to make it even lighter or stiffer. Most people do not spend the $$ and use mild steel. It has some advantages, as well i.e. does not sheer with sharp edges most of the time.

Anton
04-20-2010 05:16 PM
kmt63
Quote:
Originally Posted by xtn View Post
How the heck can it be welded in?

xtn
they would be tig welded in.tig doesnt throw sparks all over the place.i seen kurt install a few in customers cars.he was selling a knock down kit that the customer could install too.
04-15-2010 01:45 AM
mgreenbl they have installed a number of cages into Lotus cars and I will likely be getting a cage from them. if you have any questions, call them at 818.782.4691

Mark
04-14-2010 02:22 PM
Shawn C Updates please!
07-01-2009 07:45 AM
cory1000
Quote:
Originally Posted by DPM View Post
I'll have to check my records but I believe there is a place in Georgia that made them. I think he was the original guy making them for HRM cars for SCCA.
It was Kurt at Hypersport...he did the cage for my car...
07-01-2009 05:03 AM
xtn How the heck can it be welded in?

xtn
07-01-2009 04:19 AM
DPM I'll have to check my records but I believe there is a place in Georgia that made them. I think he was the original guy making them for HRM cars for SCCA.
07-01-2009 04:09 AM
pixieluv
Quote:
Originally Posted by HobanJ View Post
Any updates?
I am curious as well
06-22-2009 03:58 PM
HobanJ Any updates?
03-19-2009 09:24 PM
9and3
Quote:
Originally Posted by r3motorsport View Post
Here are some pre production shots of ourR3 Motorsport new SCCA legal roll cage for the Lotus Elise/Exige.
r3motorsport, just curious: Do you feel that r3motorsport had to make any safety compromises to make this cage for a Lotus? Also, have you had a chance to do many post-crash analysis of similarly designed cages?
03-18-2009 01:22 PM
Iman Are they available unwelded?
03-16-2009 03:10 PM
A7594217
Quote:
Originally Posted by BallerStatus08 View Post
there goes all my money. Can't wait to see it installed.
Ditto...lol
03-16-2009 12:55 PM
Iman any pics installed?
03-13-2009 06:34 AM
Piasa How much do they weigh?
03-13-2009 12:51 AM
r3motorsport
Roll cages available

Here are some pre production shots of ourR3 Motorsport new SCCA legal roll cage for the Lotus Elise/Exige.

Available either in bolt in or fully welded. We also offer these cages with either welded in side bars or removable and removable knee bar.

CNC bent,optional tig or standard Mig welded

Bolt in / installed $1950.00
weld in/ installed $2550.00
tig option $500.00 extra

Happy racing!

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