afx Posted September 28, 2019 Share Posted September 28, 2019 (edited) The frame was pressurized, note the gauge on the dash bar. If the pressure dropped this signaled to the driver/mechanic that a weld had failed. Edited September 28, 2019 by afx Quote Link to comment Share on other sites More sharing options...
Ace-Garageguy Posted September 28, 2019 Share Posted September 28, 2019 Man, this is great. Thanks again to everyone who's posted photos and reference material. Not only is there a lot of stuff here in one thread, but it's a helluva jumping off point for anyone who wants to follow up with more in-depth research. I just wish the book Matt linked to wasn't almost $750. That's a little steep at the moment, though it looks like an invaluable resource. Quote Link to comment Share on other sites More sharing options...
afx Posted September 29, 2019 Share Posted September 29, 2019 (edited) 21 hours ago, Gramps46 said: JC, I checked four 917 books and three use the designation LH and one just the letter L. I did not find any "official" Porsche documentation, yet. I had assumed the L was a contraction for Langheck. I will keep looking. I have seen the Simeone 917LH and the #35 Martini 917K when owned by Bobby Rahal and they are amazing. Porsche-Excellence Was Expected lists "917L" for the long-tails, "917LH" does not appear. Here is my take on it. The original 917 was sold with two tail sections; long-tail and short-tail. Original long-tail: Original short-tail: I believe the "917LH" designation was adopted for the later 1970/1971 long-tail versions to differentiate them from the original 1969 iteration. Edited September 29, 2019 by afx Quote Link to comment Share on other sites More sharing options...
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