ctk30

See how the two bars go down from the rear cross bar





And there will also be the bar that comes from about a 1/3 of the way to the passenger side on the main hoop to the frame on the opposite side

You can see it here, just above and a little to the left of the seat

rhneff

I'm not a licensed Scrutineer so my opinion doesn't count for much, but I would say no. The GCR is quite specific relative to bracing of the main hoop and your layout doesn't meet the requirements of 9.4.B.2 in terms of lateral bracing. Neither of the two braces you have would withstand lateral crash impact IMO, both because of insufficient triangulation and because they're not tied into the rigidity of the main hoop itself as the required diagonal brace is intended to be - I can't tell from the pics exactly what they're tied into. Regardless of that, I would question the structural integrity of the design.

ctk30

I just wish the diagonal wasn't such a PITA to add to existing bar

fatbillybob

I'm in a build right now. I think the gcr would forbid your idea too.

AU N EGL

They get real picky on details, little details. If something is just not the way it was written in the GCR, your toast.

Do believe the Door bars must be the NASCAR style door bars ( TWO ) and bracing in those door bars as well.




Rear bracing:



These pics may be a bit old and not sure if they are up to tech specs, but they give you an idea

source: http://www.rollcageguy.com/

ctk30

Yeah I'm going to be adding the nascar bars too, only on one side though

Thanks for the pics

It looks like I'll be adding the diagonal too

john bulba

Here is a pretty good link with the most current info I could find.

http://www.scca.org/documents/Club%2...chBulletin.pdf

0C5stein

Nope, that wouldn't pass SCCA tech in SF region for sure.

ctk30

I looked again and the diagonal doesn't seem too bad to put in so thats good

ghoffman

No, I would not pass it even if it was not in the GCR. The diagonal prevents the hoop from acting like a parallelogram and crushing.

trackboss

I agree with the above. In addition, the surge tank for the coolant in the above car is far too low to do anything. It may actually make cooling worse being that low by further lowering the coolant level and increasing the air pocket in the cooling system. Surge tanks must be mounted so the water line in them is the highest point in the cooling system.

-V

ctk30

Yeah I'm definately adding it now

And I don't know who owns the car above with the surge tank but I do know it was local to me at one time in the 70's

I'll get pictures of my cage once it's completed

73-84 IMSA Widebody

The car in the first pic is twinturbos in the Netherlands. I don't think they have SCCA there.

ctk30

His door bars aren't certifiable either, I was just using his car as an example


I have another question do you guys weld the cages in at ride height or with the frames on jack stands?