Page 3 of 3 FirstFirst 123
Results 21 to 28 of 28

Thread: Original muffler (exhaust silencer) material

  1. 01-15-2022, 08:26 AM #21
    swisscheese
    swisscheese is offline
    Senior Member swisscheese's Avatar
    Join Date
    Jan 2003
    Location
    The Netherlands
    Posts
    386
    yes, cool stuff !
    911S 1973
    Early 911S Registry #176
    Reply With Quote Reply With Quote
  2. 01-16-2022, 08:35 AM #22
    Jay Laifman
    Jay Laifman is offline
    Senior Member Jay Laifman's Avatar
    Join Date
    Mar 2009
    Posts
    623
    It looks like the number is stamped on top? Is there any way to see the number on a muffler in a car?
    Reply With Quote Reply With Quote
  3. 01-17-2022, 04:35 AM #23
    swisscheese
    swisscheese is offline
    Senior Member swisscheese's Avatar
    Join Date
    Jan 2003
    Location
    The Netherlands
    Posts
    386
    Quote Originally Posted by Jay Laifman View Post
    It looks like the number is stamped on top? Is there any way to see the number on a muffler in a car?
    Underside:
    Name: Bisschoff 3-73 11ct.jpg Views: 183 Size: 73.8 KB
    911S 1973
    Early 911S Registry #176
    Reply With Quote Reply With Quote
  4. 03-02-2022, 12:42 PM #24
    swisscheese
    swisscheese is offline
    Senior Member swisscheese's Avatar
    Join Date
    Jan 2003
    Location
    The Netherlands
    Posts
    386
    folks, I promised in an earlier post that I would check the outer layer of the 3/73 Bischoff being stainless or steel. I took the magnet and it clicked immediately to the outer skin, so that proves it's steel and not stainless.

    Name: IMG_20220225_115325.jpg Views: 140 Size: 46.0 KB
    911S 1973
    Early 911S Registry #176
    Reply With Quote Reply With Quote
  5. 03-02-2022, 12:47 PM #25
    911MRP
    911MRP is offline
    Senior Member
    Join Date
    May 2012
    Location
    UK
    Posts
    2,762
    The double layer ones can be stainless outer over regular so magnet may not be a definitive
    Reply With Quote Reply With Quote
  6. 03-02-2022, 12:52 PM #26
    swisscheese
    swisscheese is offline
    Senior Member swisscheese's Avatar
    Join Date
    Jan 2003
    Location
    The Netherlands
    Posts
    386
    and for those interested, some shots of the repair:

    patchwork on the inner skin:
    Name: IMG_20220225_121913.jpg Views: 140 Size: 68.4 KB

    Name: IMG_20220225_125325.jpg Views: 140 Size: 58.9 KB

    re-attaching the outer skin:
    Name: IMG_20220225_152545.jpg Views: 148 Size: 71.2 KB

    making the dented end pipe round again:
    first expanding:
    Name: IMG_20220225_153035.jpg Views: 138 Size: 94.4 KB

    then crimping:
    Name: IMG_20220225_153336.jpg Views: 141 Size: 70.3 KB

    finished work before grinding the welds:
    Name: IMG_20220225_153617.jpg Views: 143 Size: 81.4 KB
    Last edited by swisscheese; 03-02-2022 at 01:11 PM.
    911S 1973
    Early 911S Registry #176
    Reply With Quote Reply With Quote
  7. 03-02-2022, 12:53 PM #27
    swisscheese
    swisscheese is offline
    Senior Member swisscheese's Avatar
    Join Date
    Jan 2003
    Location
    The Netherlands
    Posts
    386
    Quote Originally Posted by 911MRP View Post
    The double layer ones can be stainless outer over regular so magnet may not be a definitive
    The magnet was tried with the outer skin separated from the inner skin. So not both skins attached.
    911S 1973
    Early 911S Registry #176
    Reply With Quote Reply With Quote
  8. 03-02-2022, 01:34 PM #28
    911MRP
    911MRP is offline
    Senior Member
    Join Date
    May 2012
    Location
    UK
    Posts
    2,762
    In that case since I have one example that is certainly stainless outer dated 10/72 there might have been two versions of the bischoff a stainless outer and a regular outer?
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules


Message Board Disclaimer and Terms of Use
This is a public forum. Messages posted here can be viewed by the public. The Early 911S Registry is not responsible for messages posted in its online forums, and any message will express the views of the author and not the Early 911S Registry. Use of online forums shall constitute the agreement of the user not to post anything of religious or political content, false and defamatory, inaccurate, abusive, vulgar, hateful, harassing, obscene, profane, sexually oriented, threatening, invasive of a person's privacy, or otherwise to violate the law and the further agreement of the user to be solely responsible for and hold the Early 911S Registry harmless in the event of any claim based on their message. Any viewer who finds a message objectionable should contact us immediately by email. The Early 911S Registry has the ability to remove objectionable messages and we will make every effort to do so, within a reasonable time frame, if we determine that removal is necessary.