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Thread: Floorpan Dimension C Confusion

  1. 02-05-2021, 08:41 AM #1
    arbezc
    arbezc is offline
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    Apr 2012
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    Floorpan Dimension C Confusion

    Greetings,
    I’m in the process of positioning a new front floorpan on a 73 911. I’m confused as to factory measuring point in relation to my chassis. I’ll try to explain:
    There are 2 small (≈ 8mm) holes on either side of my floorpan just behind the wheel well opening. They look like this:
    Name: 73 911 Forward Drain Holes.jpg Views: 122 Size: 99.9 KB

    My Workshop Manual Supplement for 72-on cars in includes the following diagram & information page:
    Name: Floorpan Dimension C 1975-on.jpg Views: 118 Size: 33.2 KB

    Name: Front End Gauge P863 page 11.jpg Views: 111 Size: 61.4 KB

    The above page mentions “take-up points are welded in the floor plate since the 1975 models”. The 75-on reference table shows Dimension C as 1200±2 mm. The dimension between holes in my 73 floorpan measure 1215 mm center to center.

    Should these holes align with the reference points at Dimension C or are they merely drain holes in the earlier cars? Do 1975-on floorpans have visible take-up points at Dimension C? If anyone has an image I would appreciate seeing it.

    Thanks in advance,
    Charles[/FONT]
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