Roll Bar Connected to the A pillar. Not rollover Pertection
#1
Senior Member
Thread Starter
Join Date: Oct 2011
Location: The Race Track & St Pete FL
Posts: 640
Total Cats: 59
Roll Bar Connected to the A pillar. Not rollover Pertection
So I'm not a big fan of drilling a bunch of holes in my floor for sub frame connectors. I did have a full cage in my 93 and I don't want to go in that route in a street car. I looked on the internet for about 2 hours tonight and found 2 examples of what I was thinking. But both went to the mirror mounting area. I was thing has anyone made a roll bar, then added bracing that goes from the roll bar to where the hardtop mounts go, just to stiffen up the chassis and NOT for roll protection. If anyone has thought of this or tried it please share. I was thinking of 3 bars total 2 going straight forward to the hard top mounts but tucking up next to the hard top. One other bar going from drivers side roll bar to the passenger side A pillar to help twisting force.
#3
Forgive me for my ignorance. Really hoping to learn some more about this myself.
I thought sub-frame connectors were only attached under the car, like the butterfly brace. Do you have to drill holes in the floor for them?
Also, this is probably not what you want, but I was told adding door bars to a roll bar adds a good bit of stiffness. If you are already putting in a roll bar, but don't want a cage, would door bars be a good compromise? Can always take the time to seam weld. Wouldn't have holes in the floor going that route.
I thought sub-frame connectors were only attached under the car, like the butterfly brace. Do you have to drill holes in the floor for them?
Also, this is probably not what you want, but I was told adding door bars to a roll bar adds a good bit of stiffness. If you are already putting in a roll bar, but don't want a cage, would door bars be a good compromise? Can always take the time to seam weld. Wouldn't have holes in the floor going that route.
#5
Senior Member
Thread Starter
Join Date: Oct 2011
Location: The Race Track & St Pete FL
Posts: 640
Total Cats: 59
Forgive me for my ignorance. Really hoping to learn some more about this myself.
I thought sub-frame connectors were only attached under the car, like the butterfly brace. Do you have to drill holes in the floor for them?
Also, this is probably not what you want, but I was told adding door bars to a roll bar adds a good bit of stiffness. If you are already putting in a roll bar, but don't want a cage, would door bars be a good compromise? Can always take the time to seam weld. Wouldn't have holes in the floor going that route.
I thought sub-frame connectors were only attached under the car, like the butterfly brace. Do you have to drill holes in the floor for them?
Also, this is probably not what you want, but I was told adding door bars to a roll bar adds a good bit of stiffness. If you are already putting in a roll bar, but don't want a cage, would door bars be a good compromise? Can always take the time to seam weld. Wouldn't have holes in the floor going that route.
#11
Blackbird has done a couple of "street" cages, not exactly what you are talking about, but may be worth a look.
https://www.miataturbo.net/race-prep...eth-you-67640/
https://forum.miata.net/vb/showthread.php?t=454185
At the risk of speaking for Moti, I am pretty sure he would be willing to do some different things with the door bars.
https://www.miataturbo.net/race-prep...eth-you-67640/
https://forum.miata.net/vb/showthread.php?t=454185
At the risk of speaking for Moti, I am pretty sure he would be willing to do some different things with the door bars.
#12
I had door bars in my NA which made a drastic difference in terms of rigidity. It was however a pain both to enter and exit the car. This time around, I have the FM frame rails on my NB and while not quite on the same level as the door bars, there is definitely a noticeable difference.
+1 for frame rails especially considering its a street car.
+1 for frame rails especially considering its a street car.