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boxing in frame rails

Old 04-03-08, 02:47 AM
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boxing in frame rails

Hey, i was searching around and found this for MIatas http://flyinmiata.com/index.php?dept=15

That is real nice, Anyone sell or fabricate this sort of stuff?

I need to measure my buddies miata, but what are the chances this thing fits a 2nd gen rx7? Just the frame rail part, not the middle

Last edited by initial D is REAL!; 04-03-08 at 02:53 AM.
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Old 04-03-08, 10:32 AM
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Measure it and post your results, this could be pretty useful. The autoexe product listed here at corksport might fit the bill too:

http://corksport.com/store/category/...sion_misc.html
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Old 04-03-08, 12:04 PM
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I've got to wonder how much benefit there is to these in a non-convertable car.
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Old 04-03-08, 12:40 PM
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Drag racers do this all the time. If you make enough torque and launch har you can actually twist the chassis on many cars. If you put in a rollcage it won't really help to dbox the frame rails unless they are weak or damaged.
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Old 04-03-08, 01:14 PM
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Originally Posted by ptrhahn View Post
I've got to wonder how much benefit there is to these in a non-convertable car.
Another reason I wouldnt mind this mod is because my frame rails are dented up from people not raising and supporting the car correctly.

Im sure it still helps a lot even though most of us have coupes
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Old 04-03-08, 01:56 PM
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Look into stiffening the chassis with foam. I helped my girlfriend do that to her Miata, and I've done it to my FC. It really made a big difference in both cars, but most notable in her Miata.
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Old 04-03-08, 02:36 PM
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It would be nice to use the frame rails as jacking points.

Since I'm in the middle of rust removal (replacing floorpan, frame rails, rockers), I'll see if I can get some pics this weekend. I am using 18 ga steel for the inner and outer frame rails. My brake is only 36" so the rails are going to be two pieces butt welded together.

I am also using 4lb/cubic foot urethane foam in every cavity. I won't have any results for a couple months, as I still have a TON of work to do and am running low on money (college induced poverty).

These are the outer frame rails that I got welded in over spring break. There is still an infinite amount of weld grinding left.
Attached Thumbnails boxing in frame rails-dscf2052_800x600.jpg   boxing in frame rails-dscf2053_800x600.jpg  
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Old 04-03-08, 06:57 PM
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offroaders box their frames alot...

yea... doin any of the above will stiffen any car


if you ever plann to run this car in sanctioned compition do some research first to make sure it's allowed for the class you plan to run
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