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Some Help From Roll Cage Builders For Sports Sedans

GTR32G

By GTR32G,
in Motorsport Discussion & Builds

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GTR32G Proficient

GTR32G

Posted
Posted

Was hoping to get some advise and help from some of the people on here that have built or building roll cages and know 3D Sports Sedan regulations, Have a friend looking at a EVO race car in New Zealand, car has New Zealand Motorsport Log Book with Roll Cage Homologation papers, Just want to confirm the cage would be eligible to run as 3D Sports Sedan here, Looked in the CAMS manual online but could not find much on chrome molly cages maybe i was looking in the wrong place?

Cage is made from 4130 Chrome Molly CDS

Outside Diameter : 38.2mm

Wall Thickness : 2.6mm

Yield Strength : 753Mpa

Ultimate Tensile Strength : 805MPa

Here are some images of the cage any advise or impute would be great.

post-36356-1270883574_thumb.jpg

post-36356-1270883582_thumb.jpg

post-36356-1270883589_thumb.jpg

post-36356-1270883596_thumb.jpg

post-36356-1270883605_thumb.jpg

GTR32G Proficient

GTR32G

Posted
  • Author
Posted

Also any reason why this car would not meet 3D regulations for CAMS here, this is the what the car looks like, I know I have to check the sizes of the bonnet vents and front guard vents and make sure the rear diffuser is within specs. Think it needs head lights that work and maybe other little bitsbut would there be any major reason it could not be a sports sedan? And yes still runs the full floor pan and chassis.

post-36356-1270884280_thumb.jpg

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blackrex Mentor

blackrex

Posted
Posted

Your best thing to do would be to talk to CAMS and ask if a cage certified by MSNZ is accepted here. The CroMo cages are usually done to an FIA spec that is recognised pretty much everywhere, so it may be ok. Otherwise that are some companies in Australia that will certify the cage for you.

You might be Ok with the car in that spec to run as an open class sports sedan, they have fairly liberal rules, and do not need working headlights.

Duncan Grand Master

Duncan

Posted
Posted

CAMS allows only CDS cages based on their general designs. If it is not CDS it requires full computer simulation to confirm it meets the requirements. Or you could just paint it and say it is CDS.

There has very recently been a huge argument between CAMS/NZ/FIA regarding rally cars, which ended in CAMS rejecting the FIA/NZ approved cars. Insanity.

GTR32G Proficient

GTR32G

Posted
  • Author
Posted

Duncan can you advise of some one in Sydney that will do the full computer simulation on the roll cage and do you know of anyone who has had this done with cost ect? Done a bit of google and found Rod Andrews Race Cars at Seven Hills will call him on Monday or any others?

Duncan Grand Master

Duncan

Posted
Posted

absolutely NFI mate....everyone I have ever heard of just pretends it is CDS :blink:

maybe ask bonds. and I think the cams manual had some contacts back in the old paper days.

Risking Grand Master

Risking

Posted
Posted

Bonds are the best to talk to about molly cages in sydney. Pete's done that many of them he has a very good idea of whats good enough and whats not

Its not as simple as getting an engineer to approve the design though. The paper work and evidence to cams requires MDS (material data sheets) to be provided and welding ticket from the manufacturer. As well as detailed photos etc. Its rather difficult to get a pre built molly cage done.

I have Homologation for an R32 molly cage which ive done 2 of now and the expense was not worth the outlay in my oppinion. The original cage was fully paid for by the 1st owner as well as the Homologation costs. He owns the rights to the cage Homologation, which I have his permission to use and pay him for.

Peter has Homologation for a really nice evo X molly cage and I think he may have a IX as well.

Once Homologation is complete you are able to reproduce that cage design as many times as you wish without having each car tested and the expense repeated. Just requires an inspection to ensure it meets the Homologation.

Id just be painting it and logging it as a CDS cage. Providing it fits the CAMS outlines for a basic cage you shouldnt have any problems.

Do you know the ID and OD of all the bars used??

Sorry just re read it 38.2mm so you cant do it as a CDS cage its under the minimum required.

Risking Grand Master

Risking

Posted
Posted

You dont want me welding shit for you atm duncan!!!

On a side note if you are planning to bring the car in and build more evo's from it then homologation is worth the hassle.

SS guys do this with chassis all the time to reproduce and not have to pay each time.

2pee Enthusiast

2pee

Posted
Posted

Not sure he'd be prepared to sign his rep away on something a bit unknown, have used this guy several years back on spaceframe beaming and torsion...

engineer

If you're in NSW, for 3D eligibility matters, Lance Smith would be your man to speak to if you think something is possibly over the line, long association with ASSA, should be on the list of approved scrutineers.

If the worst does happen and the cage can't be approved, we got a few ckd Evo FIA 4130 cages for the 12hr out of Italy relatively cheaply a year or so ago...just add filler wire!

GTR32G Proficient

GTR32G

Posted
  • Author
Posted

Thankyou for every ones help, spoke to Peter at Bonds today and also CAMS, car will not comply as is would need some work so not buying...

Anyone got a Nissan race car they want to sell instead????

  • 6 months later...
Sir Lord Van Von Vader'ham Veteran

Sir Lord Van Von Vader'ham

Posted
Posted

Thought id post my question here before starting a new thread :blink:

I’ve just received a bonds six point bolt in cage for my HR31 and am worried about the position of the diagonal bar on the main hoop.

With the cage assembled, it goes from the driver’s side bottom to the passenger side top.

Is this correct? I had a look in the CAMS manual and from the diagrams it looks like it should go the other way. Will it pass log booking like that?

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