Results 1 to 7 of 7

Thread: 1970 911S compression numbers

  1. 10-04-2005, 05:08 PM #1
    surf
    surf is offline
    Junior Member
    Join Date
    May 2004
    Posts
    21

    1970 911S compression numbers

    What are the range of acceptable numbers [LBS] for a cylinder compression test.stock 1970S
    Reply With Quote Reply With Quote
  2. 10-04-2005, 06:46 PM #2
    boxster03
    boxster03 is offline
    Senior Member
    Join Date
    May 2005
    Posts
    2,969
    if I am not mistaken it would be around 175 and all cyl. should be +/- 10 of each other
    Early 911S Registry #750
    1970 911E - The Good Stuff
    2001 Toyota Landcruiser
    Reply With Quote Reply With Quote
  3. 10-04-2005, 06:50 PM #3
    kenikh
    kenikh is offline
    Small Bore Whore kenikh's Avatar
    Join Date
    Feb 2005
    Posts
    5,046
    My '69S had 125 psi across all cylinders, with less than 6% leak on all with variance of 2% max. Were the 2.2S that different?
    Kenik
    - 1969 911S
    - 1965/66 911
    - S Reg #760
    - RGruppe #389
    Reply With Quote Reply With Quote
  4. 10-04-2005, 07:01 PM #4
    boxster03
    boxster03 is offline
    Senior Member
    Join Date
    May 2005
    Posts
    2,969
    I could be wrong as I was going by memory but that is always suspect.
    Early 911S Registry #750
    1970 911E - The Good Stuff
    2001 Toyota Landcruiser
    Reply With Quote Reply With Quote
  5. 10-05-2005, 04:13 AM #5
    surf
    surf is offline
    Junior Member
    Join Date
    May 2004
    Posts
    21
    The reason I ask is I got 135 lb to 140 lb on all cylinders.I can't find the specs on this in any books.
    Reply With Quote Reply With Quote
  6. 10-05-2005, 06:10 PM #6
    pu911rsr
    pu911rsr is offline
    Senior Member
    Join Date
    Mar 2005
    Posts
    2,899
    Figure c/r is around 10:1 should give 14.5 psi x 10 = 145 psi, doesn't always work out that way with radical cams etc.
    Phil
    Reply With Quote Reply With Quote
  7. 10-05-2005, 07:34 PM #7
    boxster03
    boxster03 is offline
    Senior Member
    Join Date
    May 2005
    Posts
    2,969
    135 to 140 on all would be good, no problem especially being it has some miles on it
    Early 911S Registry #750
    1970 911E - The Good Stuff
    2001 Toyota Landcruiser
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Similar Threads

  1. 1970 911T Compression Gasket Problem
    By thilmes in forum Technical Info
    Replies: 10
    Last Post: 01-19-2014, 10:58 AM
  2. matching numbers 1970 911T
    By davewadd in forum For Sale/Wanted: Early 911 Cars, 1965 - 1973
    Replies: 0
    Last Post: 08-22-2012, 04:25 PM
  3. 2.2T compression/leak numbers
    By jetdriver21 in forum Technical Info
    Replies: 3
    Last Post: 12-30-2007, 11:16 AM
  4. what should compression readings be 69 911s?
    By blucille in forum General Info
    Replies: 6
    Last Post: 05-25-2005, 07:07 PM

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.