342strokermotor

I been reading around. Whats teh deal on Bolt IN Roll cages?/ Are they legal? Are they stronger or weaker?? Will they rip out of the floor pan and wheel wells> or is i better to get. If i am planning to only go 11.5 ET in da 1/4 Is it NHRA LEGAL??? Please help, I would hink about bolt in!! But i dont wantto sacrifice safety by the way.

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JD1969

They are legal if installed correctly. If I remember right you need to use a 6' x 6' by 1/4' steel plate on the bottom side of the car where the bar bolts in. You also need 5/8's grade 8 bolts. The info is in the NHRA rule book, I would double check me because I am just going off what I can remember, so my numbers might be off. You can always get a bolt in cage welded in later on if you want.

FullAuto

You don't need anything for a 11.5 unless you're a 'vert. I wouldn't do a bolt-in. I think they are for looks. If someone has one and tells me they did it for safety, I tend to think they don't understand the concept.

randy78045

If youre not a vert, what's the limit???

FullAuto

11.49 and quicker needs a 5 point (no passenger side door bar required - but good luck finding a kit that doesn't have one). I took it as if he'd be running down to the limit.

342strokermotor

Will th roll cage also stiffen up the chassis too with the bolt it?? im onyl asking cause If i can get away with the Bolt In, id be happy to do it myself =)!!!!!!!

bernout

what are rules about verts ?

just curious

klapdout

bolt in cages will never, and can never be as strong as a weld in cage, dont play games with your saftey use a welded cage

SSKiller

If you run a 13.99 or quicker you need a 4 point roll bar in a vert.

If you run a 11.49 your need a cage....

JD1969

actually they are quite strong, if installed correctly. A welded in cage must be have a 6x6x1/4' plate welded to the floor where cage connects, the bolt in's must have the same plate top and bottom. If you wreck hard enough to pull a 6x6 palte through the floor, you would most likley pull the welded plate as well. There is so much speculation at this site at times, and very few people who actually do this stuff. I build chassis for a living so I speak from experiance, not what I heard or think I know.