Finally looks like there is a proper bolt-in roll bar solution!
 

http://www.ft86speedfactory.com/auto...l#.VcPVtvlVhBc

Four points, harness bar, priced reasonably.

WIN!

Pretty sure that's been out awhile. Mounting plates look really small, I'd like to see where they land.

Been around a while. Requires welding for front mounting.

Hmmm, I hadn't run across it before.

Could have swore the only thing I saw was whatever shop is making that $1500+ roll bar.

Was around back in '13 before my car was caged. Great option.

Proper and bolt in are not words that should go together when talking about a safety device like a roll bar.

I'd argue that a bolted in design could be just as strong, but it would have to be designed properly. The problem I see with most roll bars is lack of any landing pad other than the 3x5 (if that) plate at the end of the hoop.

Does anyone have an install picture of the auto power bar?

[ame="https://www.youtube.com/watch?v=qMmjaaSQP08"]Roll/Flip - YouTube[/ame]

Yep, properly designed bolt-in roll bars don't work AT ALL. This is the exact same bar I used to run in my Miata track rat. Based on the tach and being in 4th gear means he left the track at ~95mph. (Note to everyone, when you go off like that, LET GO OF THE DAMN WHEEL!)

There are multiple, multiple incidents showing Boss Frog and Hard Dog roll bars saving the occupants in Miatas from injury.


What do you mean by landing pad? Are you talking about a plinth box like is designed to mount welded in roll cages? Or are you talking about a plate on the outside of the car that places the mounting plate in double shear?

Exactly. How you bolt it in is a major part of the equation but the one in the link has one solid bar for the main hoop, a cross bar and two rear bars for rear bracing. If it's "bolted" to properly reinforced and wide landing pads then it would be fine. Landing pad is the KEY.


pic from link:
http://www.ft86speedfactory.com/medi...race-60000.jpg

BTW: GODDAMN. I hope you have considering using a head/neck restraint system going forward.. that looked ROUGH. Glad you're OK. Just went through something similar so I can relate.

Reference the 4 landing points of the cage in the picture, if just bolted down with that little surface area they can punch through the floor pan or body in a significant impact like yours, this I have seen. So a plate or "metal pad" that covers more surface area, often used on the underside of the body in which the cage bolts to spreads the load. I think a wider pad should be on both sides of the body the bars are bolted to.

My welded in cage has thick pads (IT Spec) that cover a large surface area. In the past I used a bolted bar like this one but used larger plates above and below the body for a greater spread.

No, that wasn't me. I've only wrecked on track on 2 wheels. :) I was just using it as an example for those who like to spout off without experience on that which they are spouting off.

Yes, like I mentioned, a properly designed bolt-in bar will have larger backing plates that place the "landing pads" in double shear. Although a weld-in cage should be mounted using plinth boxes, not just landing pads, a la:

http://i1096.photobucket.com/albums/...1/DSCN3425.jpg

This is what happens with small "landing pads" without backing plates placing things in double shear (at my local track, car prepped by CarFx, essentially a bunch of jack holes who barely know how to turn a wrench)

http://images.thecarconnection.com/l...00232515_l.jpg

http://i.kinja-img.com/gawker-media/...ipe8nnjjpg.jpg

http://images.thecarconnection.com/l...00232523_l.jpg

You can see them punched through the floorboard.

http://pictures.topspeed.com/IMG/jpg...x-musta-7w.jpg

Did he dieded ?

Nope, somehow walked away.

I think it was something to do with using stock seats and belts allowing him to "fold" out of the way. That place builds terrible, terrible cars.

However, Hallett is of the opinion (and make you sign the waiver) that if you're willing to put it on track, then go for it.

I have wrecked on 2 wheels on the street (4 of us went down, 1 died) and once on 2 wheels at Hallett where a Shoei helmet saved my life after coming off the bike north of 70mph and landing head first (was knocked out long enough they red flagged the session).........I just don't understand how guys will skimp on safety.

I guess it's the whole "It will happen to them, but never me."

Spencer Fab make a excellent cage
 

I went with a Spencer Fab cage out of Seabrook New Hampshire,