Autoex (fc) Cross Braces
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From: southern california
Autoex (fc) Cross Braces
does anyone have any of these cross underbraces like the ones from corksport... if so could u please write a review about them or just tell me what u thought of them
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Joined: Sep 2003
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From: BC, Canada
I don't think anyone has them around here because they're so freaking expensive. I'm not even really sure what the back ones are supposed to be bracing against exactly either. I doubt it really does anything noticable, or anything much at all. My advice is to skip the rear braces for sure.
I did build my own front lower arm bar and I know that it helps, because a prototype I did in aluminum was permanently bent there. If you're not into building your own, then a Cusco one is about the same as mine, and the Mazdaspeed one should be a bit better.
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/how-build-lower-arm-bar-under-%2415-448638/
I did build my own front lower arm bar and I know that it helps, because a prototype I did in aluminum was permanently bent there. If you're not into building your own, then a Cusco one is about the same as mine, and the Mazdaspeed one should be a bit better.
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/how-build-lower-arm-bar-under-%2415-448638/
Another member asked how the rear Auto-X brace works in '06 so I will quote my response to him.
I am looking at an article about the FC Auto-X bar in RX-7 Magazine #016 from 2002.
The rear braces are 4 pieces all together (2 for each side) consisting of a short tubular brace and a large triangulated brace per side.
The large triangular brace mounts-
To the chassis at the bottom of the front subframe mount (the giant stud) and connects forward to the chassis floor (making one side of the triangle)
It mounts to the rear subframe at the "Y" pipe hanger mounts (making the 2 remaining sides). The piece angling from the frontmost of the chassis to chassis side to the subframe is a square tube the rest is reinforced plates.
The small tube braces-
From outward trailing arm pivot (the fixed pivot) inward to top of the floating trailing arm pivot. It is two plates the pivot bolts go through connected by a tube section.
The traingular braces would eliminate side to side and front to back movement of the subframe, but allow for the up and down movement (so sublink camber rod would work). There would definitely be some noise/vibration transmitted from subframe to chassis.
The tubular pieces reinforce the trailing arm pivots for more precise geometry and less binding.
I am very interested in trying the Auto-X braces myself!
The rear braces are 4 pieces all together (2 for each side) consisting of a short tubular brace and a large triangulated brace per side.
The large triangular brace mounts-
To the chassis at the bottom of the front subframe mount (the giant stud) and connects forward to the chassis floor (making one side of the triangle)
It mounts to the rear subframe at the "Y" pipe hanger mounts (making the 2 remaining sides). The piece angling from the frontmost of the chassis to chassis side to the subframe is a square tube the rest is reinforced plates.
The small tube braces-
From outward trailing arm pivot (the fixed pivot) inward to top of the floating trailing arm pivot. It is two plates the pivot bolts go through connected by a tube section.
The traingular braces would eliminate side to side and front to back movement of the subframe, but allow for the up and down movement (so sublink camber rod would work). There would definitely be some noise/vibration transmitted from subframe to chassis.
The tubular pieces reinforce the trailing arm pivots for more precise geometry and less binding.
I am very interested in trying the Auto-X braces myself!
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