Results 1 to 5 of 5

Thread: Mirelli S112AX vs S112BX

  1. 10-01-2011, 03:50 AM #1
    DJ911
    DJ911 is offline
    Senior Member
    Join Date
    Sep 2010
    Posts
    160

    Mirelli S112AX vs S112BX

    Can anybody enlighten me on the differences between the Mirelli S112AX (used in '69) and the Mirelli S112BX (used in '70)?

    Are they interchangeable? How about the cap (I assume they are both the 'long' version) and rotor?

    And finally which Mirelli model is it that requires the short cap?

    Thanks
    Last edited by DJ911; 10-01-2011 at 03:55 AM.
    Dirk Janek
    1970 911T 3.0/915
    Reply With Quote Reply With Quote
  2. 10-02-2011, 05:38 AM #2
    DJ911
    DJ911 is offline
    Senior Member
    Join Date
    Sep 2010
    Posts
    160
    Anybody to share some insight on this?
    Dirk Janek
    1970 911T 3.0/915
    Reply With Quote Reply With Quote
  3. 10-02-2011, 04:55 PM #3
    edmayo
    edmayo is offline
    Senior Member
    Join Date
    Jul 2006
    Posts
    8,011
    As far as I know the only Marelli using a short cap was the new style version starting in 72 #5-010-974. I never really looked at the distributor numbers back in the early 70's but I can't think of any reason they wouldn't interchange. A slight change in advance curve, for example, would require a new part number.
    Early S Registry member #90
    R Gruppe member #138
    Fort Worth Tx.
    Reply With Quote Reply With Quote
  4. 10-03-2011, 12:37 AM #4
    Fishcop
    Fishcop is offline
    Senior Member Fishcop's Avatar
    Join Date
    Oct 2002
    Location
    Port Macquarie, Australia
    Posts
    1,782
    Dirk, your 3.0 doesn't use a Marelli...
    John Forcier
    EarlyS #1987
    1968 911 Race Car "Grun Hilda"
    1969 S/T interpretation "Blau Healer"
    Restoration Saga
    Reply With Quote Reply With Quote
  5. 10-03-2011, 01:52 AM #5
    DJ911
    DJ911 is offline
    Senior Member
    Join Date
    Sep 2010
    Posts
    160
    Quote Originally Posted by Fishcop View Post
    Dirk, your 3.0 doesn't use a Marelli...
    True... however my car's original engine does have a S112BX installed. I am currently sorting through the boxes of extras that came with the car. This includes a S112AX and what I believe is a NOS long cap and rotor (that I understand are somewhat rare). Thinking (very) long term about the possibility of rebuilding the 2.2 and I was wondering if the S112AX would be a suitable backup for the S112BX.

    As always thanks for the response John, doesn't seem to mater where I post a question - you are always the first to offer help.
    Dirk Janek
    1970 911T 3.0/915
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Similar Threads

  1. FS: MAGNETI MARELLI S112AX Distributor
    By jordan67911S in forum For Sale: 911 Parts
    Replies: 0
    Last Post: 08-09-2013, 12:31 PM
  2. FS: Marelli distributor S112AX
    By Fritter in forum For Sale: 911 Parts
    Replies: 1
    Last Post: 10-25-2009, 07:40 AM

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.