jeg's roll cage legal for its 240z??

If my GCR is correct the mounting plates must be 3/16". I suspect this cage is a drag style as well. Take a look at the GCR before considering this. The rules for Improved Touring require no more than 8 mounting points on the chassis. It is very specific about where the foward facing pair of optional braces can go in the footwells. Another thing-keep in mind that the rules may eventually require NASCAR type bars on the driver's side. The type of steel is very important as only DOM and Chromoloy are now permitted. Tubing diameter and thickness are governed by car weight. I elected to use 1-3/4" x .120 in the CRX as the weight penalty was not severe and my fabricator has many years doing drag cars <G>.

Why not contact KIRK Racing to compare. We bought from them and will in the future. Good luck

------------------
Grandpa's toys-modded suspensions and a few other tweaks
'89 CRX Si-SCCA ITA #99
'99 Prelude=a sweet song
'03 Dodge Dakota Club Cab V8-Patriot Blue gonna tow
 
I'm not an IT racer (yet) but I have spent alot of time at the drag strip, so maybe I can help here.

A drag race cage has an extra 2 mounting points vrs a roadracing cage. They are located from the intersection of the rear hoop crossbar to the forward mounting points of the rear suspension. A drag race 8 point cage will not have the tubes from the front of the cage to the front suspension.

I'd think that cage could be used as a good starting place if your putting in the cage in yourself. Most of the jegster kits I have seen fit the car pretty well, so you will have the major bending and fitting done for you.
 
Since it doesn't specify that it is in fact DOM tubing, you better double check as NHRA rules aren't as stringent as SCCA. It only says mild steel tubing, not DOM.

Also, there's no diagonal in the main hoop, so that would need to be added as well.
 
A couple points:

1.625" x .134" tubing will be heavier than hell.

I purchased some 1.5 x .120 DOM last year, and it is very expensive(almost $4/foot). I highly doubt that the Jegs cage is DOM. It would be pretty hard to buy enough tubing and pay your workers and then make a profit at $149 per cage.

The Jegs cage is missing the diagonal in the main hoop

I second what jc836 said....Call Kirk racing.
 
If it actually fits, that would be a great deal.

It is drag race tubing, so even though perfectly legal, it is heavy.

You will need the diaganol.

Have fun. I use drag race tubing in my car--only because I had the material and, more importantly, the dies and shoe for the bender for it.
 
This, along with the S&W, Chassisworks, and others of similar design, is an overwight piece of crap that I wish would go away. Since there is no main diagonal (as required by SCCA rules), which is THE key structural element to a main hoop, one wonders how competent the rest of the design is if they missed this.

If somebody computer literate can host some jpeg's I have a copy of the old Z Car Magazine article on building a cage for a 240Z that describes in layperson terms what the important features are for an IT cage. It was written by somebody who knows a wee bit about stress and structures.

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katman
 
I' love to see that article Katman, but I don't have a friggen clue about hosting pictures. I'm an ME and can do numerical analysis for stress or heat flow almost with my eyes closed but I have never been interested enough in IT to learn about the web, other than as a user.

If you would scan those and mail them to me I'll ask around work and see if I can find someone to show me how to do it. I get mail at tytill<at-sign>att<dot>net

Is ther any chance we could get them posted in the tech center section of this site?



------------------
Ty Till
#16 ITS
Rocky Mountain Division
 
Katsman--There is no big problem adding a diagnol to a main hoop.

Also, kindly do not refer to drag race specs as "crap." For many years, drag racing required a horizontal bar in the main hoop (still do); it is only in the last 5 years that completing the horizontal bar --splitting a diaganol--became an SCCA requirement. The horizontal bar adds tremendous strength to the main hoop.

Also 1.625"O.D. DOM tubing--the drag race staple--was only "discovered" by SCCA to be a good recommended size in the last couple of years.

NHRA knows what they are doing too and there is a lot of crossover potential in safety aspects of the two forms of motorsports.

Cheers.
 
Katman... send the pics to me. I can host them...

scott(at symbol)izzyscustomcages.com

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Scott Rhea
It's not what you build...
it's how you build it
 
Originally posted by joeg:
Katsman--There is no big problem adding a diagnol to a main hoop.

Also, kindly do not refer to drag race specs as "crap." For many years, drag racing required a horizontal bar in the main hoop (still do); it is only in the last 5 years that completing the horizontal bar --splitting a diaganol--became an SCCA requirement. The horizontal bar adds tremendous strength to the main hoop.

Also 1.625"O.D. DOM tubing--the drag race staple--was only "discovered" by SCCA to be a good recommended size in the last couple of years.

NHRA knows what they are doing too and there is a lot of crossover potential in safety aspects of the two forms of motorsports.

Cheers.
Click to expand...

Sorry, meant to say SH&%T, and I wasn't referrring to drag racing specs at all, just the cage designs I mentioned as they would apply to this forum. A horizontal bar is in no way as effective in stabilizing the main hoop as a diagonal. Also, I doubt SCCA "discovered" anything from NHRA. Usually different types of crashes, and I'd venture to guess that SCCA has enough experience with their own crashes to justify their specs without looking into drag racers. I should have clarified that when I said I wish the S&W type cages would go away it was because I see a lot of street folks wanting to slap these in 240Z's because they're cheap- not realizing that for most applications they're probably worse off with that cage than without.

------------------
katman
 
I have a custom cage for a 240z that I
pulled out of my wreck. Its still sound.
Its free to whoever wants to clear it out
of my basement. Came out of Jim Thompson's
former z-car.

I'm gonna hate to dump it at the scrap-yard.
Its similar to the one shown in the z-car magazine article.

[email protected]

[This message has been edited by Tom Donnelly (edited April 12, 2004).]
 
Which idea? Scrap it or give it away?

I'm renting out my house and the rentors are about to buy. I tried convincing them that the cage was an "appliance" that made the house worth more but to no avail.

I have a 1985 1/2 porsche 944 parts car stored there thats up for grabs as well. Its not free though.

Tom
 
Originally posted by Tom Donnelly:
Which idea? Scrap it or give it away?

I'm renting out my house and the rentors are about to buy. I tried convincing them that the cage was an "appliance" that made the house worth more but to no avail.

I have a 1985 1/2 porsche 944 parts car stored there thats up for grabs as well. Its not free though.

Tom
Click to expand...

Tom, let me know about the 944. I have a neighbor looking for a parts car. [email protected] Thanks, Steve.
 
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