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Now I just got through reading the 2010 rules for Formula D. I am not pretending that I understand all aspects of the rules, but the ones pertaining to the front and rear sub frame seem pretty clear.
8.3.4 Front cross member and/or front or rear sub-frame
Front and rear sub-frames and cross members must be stock and
available on the exact model that is competing in Formula Drift. The
subframe must also be mounted in the exact stock location, without
being moved in any plane.
Front subframes may only be modified to directly allow for oilpan /
starter clearance and steering rack relocation. The front subframe must
retain intact on at least one major member on one face that spans the
entire width of the subframe, thereby keeping the original dimensions of
the subframe intact. Any other modifications, cutting, welding,
strengthening, etc is not allowed.
Rear subframes may only be modified to allow for mounting or
relocating a differential. The rear subframe must retain at least one
major member that spans the entire width of the subframe, thereby
keeping the original dimensions of the subframe intact. Any other
modifications, cutting, welding, strengthening, etc is not allowed.
To me that means no swapping S14-S15 subframes into a S13 chassis. No relocating any pick up points on the chassis.
Now if you are not worried about that sanctioning body then no prob.
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