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Thread: 'R' Style Engine Lid Hinges

  1. #21
    Quote Originally Posted by Mr9146 View Post
    I thought that was Armando's website.
    pretty sure Armando is SlidevalveRSR on pbase.
    keith
    '75 RS/RSR-look | '73 CB750 | '70 TD250B

    r gruppe # 436

  2. #22
    Senior Member Bill Simmeth's Avatar
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    Quote Originally Posted by keith View Post
    pretty sure Armando is SlidevalveRSR on pbase.
    Armando has that and 9146gt on pbase. Ernie has 911r.

  3. #23
    This is the photo that Keith talks about in post #18, it's from my PBase site, It clearly shows the curvatures needed for the hindges, so the lid can swing open and lay on the rear window. I've also posted a reference for the placement of the rubber pull downs, it's a 74 Carrera lid in the photo but it's the same for R, RS, RSR cars. The rule starts at the edge, then the drain hole, and the 2 diagonal small holes for the bracket on the pull down. Also look closely, you will see spot welds on either side of the diagonal holes, that's a small piece of metal used as a doubler behind the frame for the mounting screws. The R lid is all fiberglass, but the R still has reinforcements behind the inner frame for the pull downs, its listed as item #10 in the above parts page. The R4 prototype does not have the drain holes for the inner frame of the lid, and the pull down bracket only uses one screw to attach it. The hinge placement can be referenced by the roof vent holes. It seems like a lot for just 2 small hindges, but the details are what count in a car well done...I started my 911R site on PBase 13 years ago when you could not find any info for the R on the web. Armando's PBase 914GT site was my inspiration for starting it, at one time I had about ten times the info, until I found my postings being sold on the internet... Over the years i've had the opportunity to view and photograph over half of the original 911R's. The R is my all time favorite...now you know who started the R-Gruppe name...
    Attached Images Attached Images     
    Ernie W
    member of Early 911S Registry

  4. #24
    Fantastic data. The rubber tie down positioning info is greatly appreciated!

    As to hinge positioning, I have been working on the assumption that they are spaced 495mm center to center (which I hope is more of less accurate, as that's where I measured for the angle of the pivot tabs/decklid foot!)
    keith
    '75 RS/RSR-look | '73 CB750 | '70 TD250B

    r gruppe # 436

  5. #25
    Senior Member
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    One of the more interesting items here is the lack of craftsmanship on the originals. They're not perfect. This is fairly typical of in-period work. We've seen the same thing on all of the racing Porches of the period. Some of the original German welding is just ugly. Looking at the 908/3 it's really easy to see what's been done in recent history and what was done in-period.

    This is the perennial question one always faces with a restoration. The Revs Institute approach is to leave the original surface intact whenever possible. Any attempt to remove the scratches on the originals would be seen as an intervention.

    Richard Newton
    What is Really Original?

  6. #26
    Lack of craftsmanship seems to be more prevalent on the prototype hinges, right? The thinner plate, less screws variants?
    Looking through photos, it appears like the quality got better on some (although some of those even look hand-drilled on the decklid foot pattern.)
    interesting stuff.
    keith
    '75 RS/RSR-look | '73 CB750 | '70 TD250B

    r gruppe # 436

  7. #27
    A little better photo showing the location of the rubber tie downs, this is a late steel frame ducktail from a 74 Carrera. It was interesting when I found the holes and reinforcements for the tie downs since it was a later model 1974. The diagonal holes were just filled with resin.
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    Ernie W
    member of Early 911S Registry

  8. #28
    more importantly; where can I get one of those rulers?
    keith
    '75 RS/RSR-look | '73 CB750 | '70 TD250B

    r gruppe # 436

  9. #29
    It took me 31 years for mine...the experience...PRICELESS...
    Ernie W
    member of Early 911S Registry

  10. #30
    nice.

    made 2 last revisions after printing a prototype this weekend and checking it on the chassis we have on the Celette at the moment; had to angle the pivot tabs and spine to correct for decklid/cowl slope, AND twist the pivot tabs to account for the curvature of the decklid/cowl parting line.

    ended up something like this (left the XYZ axes in for angle reference):

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    I'm printing these up now to verify fitment. If they're acceptable, I'll start costing them out and see if it is a viable product. (with 4mm clevis and cotter pin, of course.)
    keith
    '75 RS/RSR-look | '73 CB750 | '70 TD250B

    r gruppe # 436

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