8.50 Cert
#1
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Car: Iroc 88
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8.50 Cert
Sorry, I'm sure this has been discussed alot. I see people have varying answers. I'm going to be running .120 DOM. Are the 6"x6" plates acceptable or do they need to be tied into the subframe? Is 1-5/8" tubing adequate for all tubes? Can the lower main hoop diagonal bars be tied to the tunnel? Or do those bars have to go to the "subframe"
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Re: 8.50 Cert
Since you are requesting about 8.50, this must be for a full cage and not just a roll bar.
Minimum requirement will be 8 point. Main hoop(2), Diagonals from under cross bar down to driveshaft tunnel or subframe(2), Rear tubes(2), A-pillar bars with halo bar around roof and at least a drivers side door bar however it's recommended to also install a passenger door bar. Every other tube added is there for a reason but is not required for an 8.50 cert. Since third gens are a unibody, 6x6 plates at every point that a tube attaches to the floor. The plates should be welded to the floor and can be bent or contoured to fit the floor where you intend to mount a tube. Although it will pass, I do not recommend bolting the plates to the floor and the floor structure in a third gen does not allow proper shape or access to have a plate above or below the floor sheetmetal.
0.120" DOM is the required tubing. 1-5/8" is required for all the above mentioned tubes except the diagonals. Extra tubes such as knee bar, sill bar, door bar, rear X bracing etc have minimum requirements depending mainly on the length of the tubes.
This is how I installed my cage but I added a lot more bars. Like I said, they're all there for a reason. Has no problems getting an 8.50 cert.
https://www.thirdgen.org/forums/fabr...roll-cage.html
Minimum requirement will be 8 point. Main hoop(2), Diagonals from under cross bar down to driveshaft tunnel or subframe(2), Rear tubes(2), A-pillar bars with halo bar around roof and at least a drivers side door bar however it's recommended to also install a passenger door bar. Every other tube added is there for a reason but is not required for an 8.50 cert. Since third gens are a unibody, 6x6 plates at every point that a tube attaches to the floor. The plates should be welded to the floor and can be bent or contoured to fit the floor where you intend to mount a tube. Although it will pass, I do not recommend bolting the plates to the floor and the floor structure in a third gen does not allow proper shape or access to have a plate above or below the floor sheetmetal.
0.120" DOM is the required tubing. 1-5/8" is required for all the above mentioned tubes except the diagonals. Extra tubes such as knee bar, sill bar, door bar, rear X bracing etc have minimum requirements depending mainly on the length of the tubes.
This is how I installed my cage but I added a lot more bars. Like I said, they're all there for a reason. Has no problems getting an 8.50 cert.
https://www.thirdgen.org/forums/fabr...roll-cage.html
#3
Junior Member
Re: 8.50 Cert
My cage certed 8.50. As you can see the diagonal bars go to the tunnel on a plate. The X in the door bars was simply cosmetic per my request. They arent a requirement in an 8.50 cert cage.
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DynoDave43 (01-16-2024)
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