What happens when you roll a 4x Innovations Roll Cage?
For quite a while I’ve been working on setting up some roll cage testing. I have finally managed to make it happen. To start out I had a 1986 4 Runner that used to be my daily driver. Being in the rust belt, it needed a lot of help, more help that what it had become worth. I decided that it was time to get rid of it, and prove out some engineering simulations, and have a little fun at the same time.
Install:
I created a time lapse video of the install. As you can see install is simple as long as you know how to weld. The key to this level of simplicity is all tubes come prenotched, ready to weld (dash bar and harness bars do not come notched). 4x Innovations 4 Runner Internal Roll Cage install time lapse - YouTube
The test assumptions:
The truck is not a fully loaded wheeling rig. It is short a few hundred lbs of tires, suspension, seats, fluids, and fuel tank.
These are not all worst case rollovers. Everything should be considered for reference only.
The rolls were not performed on rocks; however there were several rocks in the path. Additionally rolls 4 and 5 were performed on frozen ground.
On with the goods.
The first roll is just to show what the truck and cage do in a basic typical roll over. The hill has about a 2 foot tall drop at the top leading to a smooth transition to flat. On the first roll the truck went over on the passenger side and rolled 1.75 times.
Damage report: The windshield cracked, but did not shatter, and the windshield frame is still straight. From studying the crack patterns and photos the windshield actually landed on a rock and it was not the opening itself deforming. The passenger side wing on the rear bumper also took a very hard hit which bent it inward some.
Damage report: Nothing new other than standard sheet metal damage.
Roll #3:
We moved to a nice steep, tall hill. Once we got the truck to what we thought would be a good position we sent it on down. However this roll ended up actually being softer than the first two. The truck rolled once down the shallower portion of the hill right at the top of the steep portion of the hill the truck ended getting swung around up facing straight down hill and slid to the bottom.
Roll #4:
We moved to a taller hill with a 4 ft vertical drop off at the top to a steep embankment. For this roll we pushed the truck off the top from the rear. This caused the truck to flip end over end at the bottom of the ravine.
Damage Report:
In this case again there was no discernible damage to the roll cage. The result ended up being more interesting as to what happened to the front bumper mount more than the roll cage. The bumper itself did not bend at all, rather the lower factory weld nuts pulled through the frame cross member and the entire cross member deformed. This is a perfect example of why the front of the frame should be reinforced using a frame reinforcement kit.
For the 5th roll test we pushed the truck sideways off of the top of the same hill as #4. This roll was an amazing display of gravity and the strength of the 4x Innovations roll cage ! The truck completed 3 full rolls. The side hit on the 3rd roll came after a nearly half of a revolution with the truck air born.
Damage Report: After this incredibly violent roll the passenger compartment is still intact thanks entirely to the great strength of the DOM tubing on the 4x Innovations Internal Roll Cage. The front A pillars of the cage shifted to the driver’s side by about 4 inches, the B pillar about 2 inches, and the C pillars shifted 1 inch. An important thing to note is that the cage still has only shifted to the side, it has not shrunk in height, nor has it pushed backward toward the seats even after this abusive series of tests. Obviously the cage is not straight anymore, but it did not collapse. After all that this truck and cage has been put through I am very proud to be able to say that.
Final notes:
There are several very important notes that all considering installing a roll cage must remember; Roll cages MUST be installed by a professional welder. The welds holding the cage tubing together is just as important as the tubing itself. Also the cage tested here is the DOM cage. DOM tubing carries a significant strength improvement, meaning the tubing will absorb larger forces before permanently bending. This should be taken into consideration when purchasing a roll cage.
Damage Report: After this incredibly violent roll the passenger compartment is still intact thanks entirely to the great strength of the DOM tubing on the 4x Innovations Internal Roll Cage. The front A pillars of the cage shifted to the driver’s side by about 4 inches, the B pillar about 2 inches, and the C pillars shifted 1 inch. An important thing to note is that the cage still has only shifted to the side, it has not shrunk in height, nor has it pushed backward toward the seats even after this abusive series of tests. Obviously the cage is not straight anymore, but it did not collapse. After all that this truck and cage has been put through I am very proud to be able to say that.
Yes it was the old turbo truck. Saddly it just wasn't worth anything anymore. The inside was in O.K. shape but that all that was anymore. Shoot the seats have been in Junior for almost 2 years. The frame was rusting out quite badly, the turbo was ringing like a school bell, again, and the brake/fuel lines were rusted out. All that along with the condition of the body lead to this.
Awesome floggage! Good to see a vendor testing and documentation of it on a public forum. My only issue with this is that cage was welded professionally and doesn't quite depict what the 110v Walmart welder (average shadetree) would do in tests. I'd imagine 50% are put together at home. But then again, this proves what professional work withstands
... My only issue with this is that cage was welded professionally and doesn't quite depict what the 110v Walmart welder (average shadetree) would do in tests. I'd imagine 50% are put together at home. But then again, this proves what professional work withstands
Yes. In this case windsheild bars would have helped a little, but not much. Also for the average wheeler the windshield bars would be illegal. Cross braces behind the seats would help some but you would have to sacrifice some leg room to allow for it.
Cool thread, like has been mentioned, its great to see companys testing their products in real world situations and providing us with the results. Definitely considering 4x Inovations cage kit when it comes time (as in, when not broke) to cage my runner.
I can't remember the last time I laughed sooooo hard!!!! not only a great display of your product and it's durability ....but great entertainment as well !!!!:laughing:
Great work to get your point across...one question though. Did you have fun sacrificing your runner???:grinpimp:
YES! :laughing: And so did all the people who helped. Heck even the exercises in recovery were entertaining and fun, especially after the 4th roll wrecking the bumper mounts. It is back on the trailer at the shop. Hopefully tomorrow the weather will be better and I'll get some more shots of how it sits now.
awesome videos! i bought the motor mounts and tranfer case mounts when you first came out with them, years ago! still working like they are new.
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