Results 1 to 5 of 5

Thread: 74 CIS engine unique???

  1. 11-01-2014, 08:53 AM #1
    X-Faktory
    X-Faktory is offline
    X-Faktory X-Faktory's Avatar
    Join Date
    May 2007
    Posts
    656

    74 CIS engine unique???

    Greetings,
    I know that this year engine may be slightly outside of the early S focus, but I recently bought a very nice 1974 2.7 CIS engine. My intent is to rebuild it into a great 911 street rod engine...............but as I am dis-assembling this 2.7, I am becoming aware that some parts may be one-year only parts...........was the 74 engine unique? I'm looking into it, but is there anyone out there that knows more about this and can provide an explanation/details?

    regards,
    Al

    PS: My current plan is to build this as follows:

    9.5:1 JE pistons
    S-cams
    Weber 40-IDAs
    headers
    sport muffler

    My plan is to sell off the stock parts to offset the build costs....and then sell the rebuilt hotrod motor to finance my next 3.2 project, but if someone needs this engine for their 74 resto ......please contact me.note; the exterior is oily/dirty, but I have the 1,2,3 side pretty much apart and the internals, so far, are in excellent shape...cam and rockers are very nice................ Nikasil cylinders (looks great and I've inspected/measured #1 so far and it is well within spec), time-certed steel studs. So far, so good.
    Attached Images Attached Images
    Al Kosmal
    the X-faktory
    Current projects; 69-911.5
    76S rat bastard---off to Germany
    1970 914-4...off to Wisconsin
    73 911X Cafe Racer...........(off to S.F.....now racing in Germany)
    66 912 ...off to France
    71E 9111200979 ( gone to Paris..then to Corsica)
    77S (off to NY)
    Early S #1240
    RGruppe #669
    www.x-faktory.com
    Reply With Quote Reply With Quote
  2. 11-01-2014, 09:02 AM #2
    Frank Beck
    Frank Beck is offline
    Banned
    Join Date
    Nov 2004
    Location
    Scottsdale, AZ
    Posts
    9,752
    oh vey...


    Not trying to be a poop but it sure seems like everyone these days wants to believe that they've got something "special". Nothing extraordinary about a '74 CIS engine.

    After the sale of your unwanted parts you should have enough to purchase 3 of your pistons.

    Good luck with the project; should be a fun little motor.
    Reply With Quote Reply With Quote
  3. 11-01-2014, 06:53 PM #3
    Richy
    Richy is offline
    Senior Member
    Join Date
    Oct 2010
    Location
    Southern Ca.
    Posts
    1,337
    The CIS system is unique with a throttle position device also regulating the control pressure for the warm up regulator .
    Reply With Quote Reply With Quote
  4. 11-02-2014, 03:51 AM #4
    ESully
    ESully is offline
    Senior Member
    Join Date
    Aug 2011
    Location
    New York
    Posts
    430
    Not unique. '73 was first 7R mag case. The throttle position regulator started on the '73.5 and was used till '75. The '73.5 was unique with 6 month only parts like the first whirl pot fuel tank with full size spare. Oil tank was also 6 month only. In '74 - '77 the injector was moved from the head to the intake runner, which was changed from steel to aluminum. They did offer an S engine with a new cam in '74 on.
    E Sully
    1973.5 911T
    Reply With Quote Reply With Quote
  5. 11-06-2014, 07:19 PM #5
    Richy
    Richy is offline
    Senior Member
    Join Date
    Oct 2010
    Location
    Southern Ca.
    Posts
    1,337
    As I said , 74 is unique , the only year to have aluminum intake runners and throttle position regulator .
    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.