Hi all
I have a question regarding roll cage.
I need one to my 6 but I still donīt know which.
Bolded or welded?
What is better and what are the strong and weak points of each construction?
Cheers for advice:smthumbup

 

Find someone close to you with experience in making the sort of cage you need. Talk to them about the use of the car as well as your wants, needs and budget.

Good luck.

 

welded out of 1 5/8 inch .083 thickness chromoly tubing. If you didnt live so far away from chicago lol i could do it for you for quite cheap aka half as much as any chassis shop

 

Yeah, Prague is a bit of a haul from the Windy City.

 

yes it is across the pond
but I will be in us in summer so I can take some steel back home
BUT the basic question is still here
what is advantage of welded?
What is advantage of bolted?
Regarding the welding I have a boudget and time needed to do so
It is expensive + I need to spend 300% more time to put car basically apart and back together
Bolted costs basically the same comes pre painted, but it is as safe?
And as well, roll cage is not street legal over here, so if case of real problems I can take the bolted off

At the moment FIA requires bolted ones.
But most of the time those cages are wilded and jist some screws are put on the floor to look like bolted

So bolted or welded that is the question

 

btw this is my start on last race this weekend
http://www.youtube.com/watch?v=6wnfOfKNrb4
one guy olmost killed him self because of stupid driving and lack of good seat, safety belts etc. He was in stock clas, but ran 100% stock car

 

This is why you need to do your homework very carefully, because you only get one shot.

Bolt in cages work just ok in an accident, but they don't offer nearly the performance advantage that a good weld in cage offers. The difference is seconds per lap.

Bolt in cages are no longer legal for most race series in the USA, I think most of the european stuff uses FIA rules for cages so check the latest versions.

In america, an evo requires 1.75x.120 DOM mild steel or chromoly. I prefer mild steel. To do a chromoly cage right, you have to heat treat and stress relieve the cage, which is a pain if the chassis hasn't been stripped and dipped.

Since cages are illegal on the street there, an autopower bolt in may be the cheapest route, but will be inadequate for any serious racing or rallying.

 

If you run with a group that requires FIA cages, to my knowledge, they must be weld-in. If you decide to go the weld-in route, Custom Cages in the UK is probably your best bet. Their customer service is terrible, but they make an execellent product, and its what I run in my hillclimb Evo (links for pictures of the build can be seen in my signature).

Dave

 

hmm
I donīt need and roll cage in my class.
It is only we had quite an bad accident this weekend and Iīm asking if this might be a good thing to have in case of safety.
And really FIA now wants cage to be bolted...
What is aproximate weight difference?
I know it depends on material I will use

 

Even if my rules didn't require it...I'd do a weld-in personally. IMO, not worth risking your life to race up a road with no cage. Track days are arguable, but obviously safer in a caged car. The package that my Custom Cages T45 chromoly cage came in was ~110 lbs.

Weld-in cages are better than bolt-in cages, IMO. Bolt-in cages typically allow for the interior of the car to remain, which is a "design flaw" to simplify installation. Weld in cages typcically have the roll cage bars much closer to the frame/skeleton of the car's unibody, and allows for gussetts to be placed in many parts.

In the end its up to you...if you want the safest car possible...do the weld-in and turn your VI into a race car. If you're just out to have fun and don't want to take it to that level, the bolt in will surely offer you a safer car than you're racing currently. Either way, good luck and stay safe!

Dave

 

A weld-in will be superior to a bolt-in no question. There are no weak points to a weld-in vs. a bolt-in, other than the fact that it's easier to remove a bolt-in. Be careful with quality on a roll bar/cage. If it isn't securely mounted it can be worse than no roll bar/cage at all, particularly if you have your harness tied to it.

 

ok good points
I will thing about it

 

Well it seems like I will purchase OMP or Sparco roll cage
Welded and bolted to the body
If I will do it, will post some pictures here for others considering same move

It will be in combination with Sparco Evo 2 seats (I have 1 at the moment) and they will be attached on the floor so I can sit as low as possible.
With 182cm E6 is not too huge for me

 

So
99% done
It is custom made as apendix J FIA CrMo all the way.
If I wish I can go to regular competition

So what do you thing?