bolting in a cage - MR2 Owners Club Message Board
 
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post #1 of 19 (permalink) Old August 4th, 2010, 10:22 Thread Starter
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bolting in a cage

ok so i got my autopower roll cage in my car but i don't know what type of bolts to use to mount it to the fire wall an to the floor.



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post #2 of 19 (permalink) Old August 4th, 2010, 10:49
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Grade 8 bolts and washers, make sure to use a backing plate on the back side.
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post #3 of 19 (permalink) Old August 4th, 2010, 20:59
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Yeah grade 8 would be nice but honestly grade 5 is what alot of bolt ins come with. The mounts would rip out through the sheet metal before 8s or 5s would fail.
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post #4 of 19 (permalink) Old August 4th, 2010, 23:38
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FYI, Autopower has the backing plates available seperately. If you want to order those please send me a PM. They are not very expensive and are really what you need to install the kit properly. Also, Autopower kits ship with the grade 5 bolts, FYI.
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post #5 of 19 (permalink) Old August 5th, 2010, 07:09 Thread Starter
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Quote:
Originally Posted by Safe Drives
FYI, Autopower has the backing plates available seperately. If you want to order those please send me a PM. They are not very expensive and are really what you need to install the kit properly. Also, Autopower kits ship with the grade 5 bolts, FYI.
what do the plates look like, i was just going to get the metal shop to make 6 of them, do you know how long the bolts need to be to go though the floor an the the ones though the fire wall? an i already put in grade 8 bolts in the kit.
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post #6 of 19 (permalink) Old August 5th, 2010, 10:39
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Quote:
Originally Posted by sweetmr2
what do the plates look like, i was just going to get the metal shop to make 6 of them, do you know how long the bolts need to be to go though the floor an the the ones though the fire wall? an i already put in grade 8 bolts in the kit.
The plates mirror the top mounting plates. They will come with all of the holes pre-drilled in the correct spots. As for the bolt lengths, I have no idea.
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post #7 of 19 (permalink) Old August 5th, 2010, 12:50 Thread Starter
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Quote:
Originally Posted by Safe Drives
The plates mirror the top mounting plates. They will come with all of the holes pre-drilled in the correct spots. As for the bolt lengths, I have no idea.
ok well if thats it i can get them made from the metal shop. thanks for the help
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post #8 of 19 (permalink) Old October 27th, 2010, 20:41
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is this a 4 point or 6 point or 8 point cage? chromemoly??

any more pic of it in the car?

Im thinking of getting one for my mr2. Just wanted to see what option are out there?
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post #9 of 19 (permalink) Old October 30th, 2010, 12:32
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Quote:
Originally Posted by KraziMike5
is this a 4 point or 6 point or 8 point cage? chromemoly??

any more pic of it in the car?

Im thinking of getting one for my mr2. Just wanted to see what option are out there?
Ditto
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post #10 of 19 (permalink) Old November 1st, 2010, 15:24
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You'd be better off having something made my a quality cage shop locally. Kits usually cut corners for ease of assembly and cost reasons which leaves them ending up not very tight against the roof and sides of the car. If you're really short you probably won't notice, but...

- KB, who has a kit-based cage in the race car he bought (came that way) and is growing very tired of constantly having his head touching the cage padding
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post #11 of 19 (permalink) Old November 1st, 2010, 15:31
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Quote:
Originally Posted by kbrew8991
You'd be better off having something made my a quality cage shop locally. Kits usually cut corners for ease of assembly and cost reasons which leaves them ending up not very tight against the roof and sides of the car. If you're really short you probably won't notice, but...

- KB, who has a kit-based cage in the race car he bought (came that way) and is growing very tired of constantly having his head touching the cage padding
Hi,

How many different cars and roll cage kits have you had experience with?
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post #12 of 19 (permalink) Old November 15th, 2010, 03:19
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Safe, do you sell something for RHD cars?
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post #13 of 19 (permalink) Old November 15th, 2010, 10:41
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Originally Posted by qmtran
Safe, do you sell something for RHD cars?
Sure, just make it very clear when you order that it is for RHD.
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post #14 of 19 (permalink) Old November 15th, 2010, 16:14
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Show us some pictures of the kits you offer for the MR2

the one in my car currently isn't nearly as good as having one done from scratch locally - main halo too low, too close to your head, rear main hoop too low. All of that with the idea to have it be able to actually fit inside the car for easy bolt together assembly. Ugh!

I'd love to be able to recommend a good kit for this car... haven't seen one yet. Not Kirk and not Autopower for certain. Having a roof curved in multiple planes is a real pain to tackle. Show us what you offer that works better or I'll have to just keep recommending someone seek out a quality local fabricator as their only decent option.

Last edited by kbrew8991; November 15th, 2010 at 16:21.
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post #15 of 19 (permalink) Old November 15th, 2010, 16:51
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A properly installed, weld in (custom or not) roll cage is always going to be safer than a bolt in. But for sure, bolt in should be better than no roll bar or cage at all. Any roll bar or cage should always have proper SFI or FIA padding anywhere that a human head could even remotely possibly hit the tube in an accident, helmets or not.

Safe Drives offers kits from Autopower and from S&W that fit the MR2. S&W only has kit for sw20. Autopower has been doing bolt in cage kits for 37 years. The prefabricated MR2 kits are not perfect, but they are better than nothing, asuming proper installation and padding. Lets face it, the MR2 interior space is not ideal for humans and roll cage tube to both occupy. I rally raced an AW11 for two years. My rally MR2 had a custom cage, even then my helmet touched the roll cage tube.

In my opinion, I think the Autopower Race Roll Bar is a good kit if you want to have race harnesses in a street car / track day car (always with proper SFI or FIA padding anywhere that a human head could even remotely possibly hit the tube in an accident). So often on the internet we see harnesses installed improperly..
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post #16 of 19 (permalink) Old November 15th, 2010, 16:58
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My second stage rally car I built was a 1995 Impreza. This car had much more head room and I felt a lot safer in it. In rally, we worry most about 40MPH trees hitting drivers doors at right angles. In that scenario a MR2 is probably just as safe as an Impreza...but I felt safer in the Impreza... (The MR2 was way more fun to drive though!)
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post #17 of 19 (permalink) Old November 15th, 2010, 17:03
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fair enough, I'll concur with that
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post #18 of 19 (permalink) Old November 26th, 2010, 23:45
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S&W cage kit?

So Safe, I looked at your website and saw no S&W products. However I did like the package deals on cages with seats and harnesses.

Now I'll be seeing kbrew at Road Atlanta next weekend(I'll be the one waving different colored flags in his general direction), so I can see an installed Autopower unit. At least I think I remember him posting that his is an Autopower one. Of course seeing the car assumes that all kbrew's adoring NASA-SE fans leave him alone long enough to talk to me. All that being said, it'd be great to have another source to cage my Mk II track car when I can get the funds. Maybe by next track day at RA.
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post #19 of 19 (permalink) Old April 13th, 2019, 22:20
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I need 10 posts in order to see pictures

I need 10 posts in order to see pictures
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