General Mounting af roll cage in a cinq

[rallycinq]

It's the bare minimum.

For maximum strength the cage should be welded in touring car/rally style. And extended to the suspension turrets, at least.

.

I would agree, as long as the cage is designed for that purpose. Adding bits to a standard cage is not to be recommended. When a full cage is designed for a WRC or similar, different strengths and sections of tube are used in different places to ensure any forces are channelled in the right direction.

Cheers

D

 

[fingers99]

I'm sure that's true at top level: Penske and Prodrive and Ford probably design stuff and subject it to some degree of testing, if only in simulation. At the level below that, one off cages seem to be built by folk with lots of experience, a TIG welder, tape measure, tube notcher and pipe bender. Looking at Fournier's books, that's still the way it's done in a lot of NASCAR, where the principle of welded in cage as chassis was invented.

As always, it's about triangulation in 3D, as far as possible. Unfortunately, drivers and engines tend to get in the way!

I've not looked at a Blue Book for 20 years or so: maybe they've put it on line and I should take a peek?

 

[Steffen Jensen]

Well...
Then its decided!

Cant wait the to weeks, ontil the cage arive!!

 

[StoneNewt]

OMP do two cages for the centos, the 105P/214 (FIA approved) and the 106/214 (RAC approved), 214 being the cento cage code. I went for the 106 which is £150 more, a few kilo heaver but stiffer & simpler to install as it's weld in.

One thing you probablly will need is adjustable dampers at the rear, my Sei became very lift-off tail happy after installing the cage & I needed to soften/slow down the damping some what to let me lift off mid-corner.

 

[arseofbox]

I'm sure that's true at top level: Penske and Prodrive and Ford probably design stuff and subject it to some degree of testing, if only in simulation. At the level below that, one off cages seem to be built by folk with lots of experience, a TIG welder, tape measure, tube notcher and pipe bender. Looking at Fournier's books, that's still the way it's done in a lot of NASCAR, where the principle of welded in cage as chassis was invented.

Should just do some ALT on it...that'd see most service stressors in it away. Unfortunately youre looking at a 5 figure sum for that testing!

As always, it's about triangulation in 3D, as far as possible. Unfortunately, drivers and engines tend to get in the way!

Its a fundamental tenet of structural engineering. That and minimising bending span lengths and compression lengths.

 

[randomizered]

I went for the 106 which is £150 more, a few kilo heaver but stiffer & simpler to install as it's weld in.

I was looking at both the OMP and out of the two decided the extra was worth it. I can't seem to find a new sparco one for sale anywhere.

Do you have any pics of it installed as this is prob on my shopping list this summer

Kristian

 

[ricambio]

Hi ya ,,,,,,,,,,,,
some more photos of a cage fitted as,,,,,,,, fitted by Fiat to FIA 5529

I Hope this help`s you with the fitting,,,,

Ricambio

 

[balidey]

Ooooh, a 'proper one' very nice

 

[Brooky]

intresting front mounts, all ive seen are mounted like:


how do you bolt the legs down or are the nuts welded on to the plates

 

[fingers99]

Maybe -- like in one of the diagrams -- anti crush tubes and another plate on the outside with captive nuts?

 

[Steffen Jensen]

The nut most be welded on the plate.
Im planning to mount the front the same way.

I must say, nice pics. Thanks.

 

[ricambio]

intresting front mounts, all ive seen are mounted like:
View attachment 39209

how do you bolt the legs down or are the nuts welded on to the plates

Hi Ya ,,,,The plates have weld nuts under them,then 12.9 grade set`s don`t use any thing under grade 8.8 ! ,
The cage also fit`s to the seat belt points on the side of the car ( as photo )

 

[Steffen Jensen]

Is it a problem to use original seat belts if the cage ins mountet??
In Denmark they has to be in the car, if you drive on the roads!
The seat belt points in the bottum of the car, isent it bloked by the welded plate??

 

[fingers99]

OTE]

Is it a problem to use original seat belts if the cage ins mountet??
In Denmark they has to be in the car, if you drive on the roads!
The seat belt points in the bottum of the car, isent it bloked by the welded plate??

Here, they're more sensible. Running a car with ordinary belts and a cage is extraordinarily dangerous: your head is very likely to hit a very hard and solid steel tube in an accident.

Can't see you'll have any problems fitting the ordinary belts, though. If you do, either weld and/or bolt a new and substantial mount.

 

[Steffen Jensen]

OTE]



Here, they're more sensible. Running a car with ordinary belts and a cage is extraordinarily dangerous: your head is very likely to hit a very hard and solid steel tube in an accident.

Can't see you'll have any problems fitting the ordinary belts, though. If you do, either weld and/or bolt a new and substantial mount.

I know, the belts will be in the car. but I will use full hardness!
The low says the original seat belts must be in the car!

 

[Brooky]

always do your harness up aswell, the guy that had the cage before me had a bump and donked his head on the bar, luckly he didnt dent the cage

 

[Brooky]

Time to rattle up an oldish thread

Anybody know the size the front mounts have to be?
Im stuck at the last hurdle:bang:

 

[fingers99]

Time to rattle up an oldish thread

Anybody know the size the front mounts have to be?
Im stuck at the last hurdle:bang:

100x100x3mm says the FIA. You could make them W shaped so they attach to the floor, vertical sill, horizontal sill and A post. 100x100 isn't that big, I think I'd want to make it bigger. This is the mount that protects, or injures, your foot!

 

[Brooky]

they dont look 100x00 in the pics, and the ones in me other cinq arn't 100x100

 

[fingers99]

They look something like 75 x 100. Maybe they're L shaped and you can't see the other bit of the L? But if you did the plate, tube and plate trick, it'd be easy enough to satisfy the scrutineers. Then again, they may be L with the bottom welded section counting as part of the 100mm. I'd prefer bent, but anything which puts the load through 3 panels (or 4) has to be one hell of a lot better than a flat plate.

Ultimately, the only person who can say it will pass is a scrutineer. I think there used to be a system for getting stuff checked more or less locally.