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Author Topic:   rollcage
md3 Racing
Dirt Full Roller

Total posts: 32
posted October 18, 2005 07:00 AM  
what does eveyone recomend for rollcage tubing size i am currntly biulding a car out of 1.75x.083 but im thinking when its done i will build another out of 1.5x.083 and just sell the first one i know the second car will be lighter what do you think

CLBaker25
Dirt Maniac

Total posts: 193
posted October 18, 2005 07:07 AM  
Your main cage needs to be 1.75x .083. You can build your front end out of 1.5x.083. Depending on what class you can either build the back end heavy or light depending on whether or not you can add weight.

Eljojo
Dirt Forum Champ
Total posts: 968
posted October 18, 2005 05:04 PM  
Main cage .095 inch and three quarters. Front loop .085 one and a half. I use a lot on one inch to triangulate too.

Chris Daniel
Dirt Roller

Total posts: 7
posted October 18, 2005 05:07 PM  
Around here 99% of guys run 1.5 .095 on the main cage. Then 1.0-1.25 .085 on pretty much everything else.

We have done this for years.

racer17j
Dirt Forum Champ
Total posts: 5390
posted October 18, 2005 05:11 PM  
I agree with 17j dont fudge on the main cage, most rules require 1 3/4 .095 wall on the main cage and I would also use it on the rear kickers, I do think the 1 1/4 is a bit small for the front bay I would prefer If I were to use it the 1 1/2 .083 in the front bay but what ever trips your trigger. Eddie

OvalRocket34
Dirt Forum Racer

Total posts: 81
posted October 19, 2005 03:24 AM  
If you really want to save weight, I strongly believe in using exhaust tubing for your entire cage. Lightest thing around!


Seriously, Every car I've had has been a 1 3/4 DOM main cage with 1 1/2 tubing front and rear. Some may say DOM is overkill but safety comes 1st.

md3 Racing
Dirt Full Roller

Total posts: 32
posted October 19, 2005 05:38 AM  
thanx for the input guys
i will build the car with 1.75 x .083 main cage and 1.5-.083 for the front,rear and the"x"
people have been telling me 1.75x.083 will make the car to rigded but is that not what we are tring to do is make the car alittle gidged so the suspention does the work

racer17j
Dirt Forum Champ
Total posts: 5390
posted October 19, 2005 05:14 PM  
A car that flexes is just one big uncontrolled (no shock) unpredictable SPRING. I use 1 3/4" .095 on all my main cage. It's is a safety factor not a rigid factor, rigidity is in the triangulation not the main cage tubing size. Oval knows what hits my car has taken and I walked away from every one!

beachracing
Dirt Forum Racer

Total posts: 94
posted October 20, 2005 12:20 PM  
I've been very happy with the kit that we installed three years ago from Stock Car Products. That kit was almost completely 1 3/4", and it has held up pretty good. The front and rear zones are important, the front especially. We build our front and rear bumpers out of 1 1/2 tubing, and bracing with 1 1/4 going up into front radiator loop. It has done an awesome job with the way we designed it, and never bent the front clip. In a collision it bends up, and to one side, and with very minimal damage elsewhere. Same goes for the rear with maybe a bit more bracing. As long as you get the proper thickness of 1 3/4, and have a good welder that can penetrate well and give you strong welds you should be fine.

md3 Racing
Dirt Full Roller

Total posts: 32
posted October 20, 2005 04:52 PM  
beachracing
the kit that i got came from stock car producuts the only thing i really dont like is the main cage gets welded to the top of the fram and i wanted to put it through the top of the frame like my last car was. this will be a pretty easy fix though \i do have a good hobart welder so proper penatration will not be a problem, and like your self i build my own bumpers much like you described

jonboy
Dirt Full Roller

Total posts: 26
posted October 20, 2005 05:58 PM  
I'm not sure using .083 on the main cage is a safe thing. I would use 1.75/.095 on the main hoops, and downsize the front and the rear of the car.

The door bars could go down to 1.50/.095.

I wouldn't use .083 on anything but triangulation, or anything you want to fold up.

I repaired a two year old modified a couple of years back that had the bottom of the frame triangulated out of 1.25/.083, and I had to finally weld it with a brazing torch, because .030 welding wire would just punch holes in it. It had deteriorated from the inside.

The weight savings are just not worth it and it will reduce the longevity of the race car.

dirtyboy58
Dirt Full Roller

Total posts: 40
posted October 21, 2005 04:18 PM  
Just my opion and your life not mine I build em ive rolled and wrecked and never been hurt saftey first main cage 095 175 the difference in weight is about 1/2 the weightas the mud your going to pick up be smart be safe and live to run next week but just my opion

md3 Racing
Dirt Full Roller

Total posts: 32
posted October 22, 2005 08:39 AM  
i did check the tubing againg and the tubing is 1.75x.095 this is what the main cage will be made of and the rest i will use 1.5x.083
this car will be for my sister i am looking to have a super stock built by a pro for myself i have spent 8 years in street stock and just what to move up and what a diffrence in cars those supers look like latemodel chasis's with stock stubs
thanx for all the help

    

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