Page 1 of 3 123 LastLast
Results 1 to 10 of 24

Thread: E , S & RS performance

  1. #1

    E , S & RS performance

    there seems to be quite a bit of talk recently on various boards concerning the performance differences between 2.2 & 2.4 E & S cars.

    2.4 E 165 bhp
    2.4 S 190bhp
    2.7 RS 210bhp

    The general acceptance is a 2.4E will be quicker in a sprint to 100 than the 2.4S, I assume due to the extra low down torque of the E. Obviously a 2.7 RS will out sprint the E by quite a margin.

    Does anyone have the torque info for these cars? I'm curious to see how the torque curve varies between the S & the RS.

    I have always been under the impression the 2.4S & the 2.7RS motors are fundamentally the same except for the larger barrels & pistons & a modified MFI pump? How much difference to the torque curve does this make?

    I Know Porsche driving is not all about the 0-60 or the 0-100 sprint, but low down torque would be usufull on the track too.
    1973 2.4S
    1993 964 C2
    987 Boxster Spyder

    'hot66'
    www.ddk-online.com

  2. #2
    Senior Member
    Join Date
    Jan 2003
    Location
    UK
    Posts
    2,694
    2.4E (911/52) max torque 151 ft lbs @ 4500

    2.4S (911/53) max torque 158 ft lbs @ 5200

    2.7RS (911/83) max torque 188 ft lbs @ 5100
    Andy

    Early 911S Reg #753
    R Gruppe #105

  3. #3
    edited
    1973 2.4S
    1993 964 C2
    987 Boxster Spyder

    'hot66'
    www.ddk-online.com

  4. #4
    Senior Member
    Join Date
    Jan 2003
    Location
    UK
    Posts
    2,694
    Took the info from Bruce Anderson's book - thought it a bit strange at the time but didn't check other sources...

    - have edited my original post accordingly.
    Andy

    Early 911S Reg #753
    R Gruppe #105

  5. #5
    Dema Elgin (elgin cams in redwood city california) has developed a modified S Cam grind that is supposed to give you E like torque at lower RPM without giving up the HP peaks in the upper revs. I just put it into my 2.4S rebuild (see other posts). I'll let you know how it goes after breakin, but of course I'll need a stock E volunteer to benchmark with.
    Chris Purpura @civilizedmisfit
    ___________
    Member #479
    Current Cars:
    1972 911T aka The "Civilized Misfit" Build
    See: https://www.excellence-mag.com/issue...vilized-misfit
    Miss February - EarlySRegistry 2023 Calendar
    1968 911S Ossi Blau/Beige Corduroy

    Past Cars:
    2019 911 Carrera GTS (sold, no regrets)
    73S - #1100 (restored and now somewhere in Europe)
    1997 993 Carrera 4S Black on Black (sold)

  6. #6
    yopurp;
    your cams sound like a good compromise.
    would love to see your car in person since I am also in the bay area.

  7. #7
    A picture is worth... well you know.

    If you look at the graph you'll notice that the 2.7RS torque curve sits right in the middle between the 2.4E and the 2.4S due to it's increased displacement dispite having the same cam as the 2.4S.
    Attached Images Attached Images  
    Bobby
    71' Olive 2.2E Targa / Early S #491

    I've always considered the glass to be half full...that is until I reached middle age and realized that it is actually half empty.

  8. #8

    Talking

    thanks for the graph. Interesting the torque for the E & S is so similar at the lower rev range
    1973 2.4S
    1993 964 C2
    987 Boxster Spyder

    'hot66'
    www.ddk-online.com

  9. #9

    Elgin cams

    Dema has a cam grind that I am going to try on my 68S. He says it's between a S cam and a 906. He has a dyno chart that shows 20 HP gain. Hard to believe, but these early 2.0 S's have 9:8-1 compression so it's possible I guess. Here is this weekends progress on the motor.
    Attached Images Attached Images  

  10. #10
    Rick - wow what a pretty block.

    SCargo - I'm in Menlo Park so San Carlos is just up skyline a wee bit. We should hook up. Send me an email when my car is done (week after next if all goes right).

    My understanding on the Elgin 'Modified S grind' is that the lower end curve is slightly higher than an E, and that it peaks out a tad over a stock S at the upper end. With adding my 2.2S pistons, I'm hoping to get closer to the RS curve above. Anyone in Norcal got a Dyno we could try it on in a few months (after brake in)? We'll also need a stock E, RS, and S to compare. Hmmm, sounding like...fun run?
    Chris Purpura @civilizedmisfit
    ___________
    Member #479
    Current Cars:
    1972 911T aka The "Civilized Misfit" Build
    See: https://www.excellence-mag.com/issue...vilized-misfit
    Miss February - EarlySRegistry 2023 Calendar
    1968 911S Ossi Blau/Beige Corduroy

    Past Cars:
    2019 911 Carrera GTS (sold, no regrets)
    73S - #1100 (restored and now somewhere in Europe)
    1997 993 Carrera 4S Black on Black (sold)

Similar Threads

  1. Performance Shocks
    By Richardnew in forum Technical Info
    Replies: 0
    Last Post: 10-15-2013, 11:51 AM
  2. ROW 2.2 T performance upgrades
    By PMNorris in forum Technical Info
    Replies: 3
    Last Post: 07-20-2013, 09:17 AM
  3. 911 T Brake Performance ??
    By xpensivewino in forum Technical Info
    Replies: 7
    Last Post: 03-20-2013, 08:31 PM
  4. AA Performance Pistons
    By thilmes in forum Technical Info
    Replies: 3
    Last Post: 02-20-2013, 07:24 AM
  5. 73 S performance
    By pu911rsr in forum General Info
    Replies: 8
    Last Post: 08-31-2008, 06:44 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
  •  

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.