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Thread: 9114400120 - Skittles - Here we go again

  1. 04-12-2024, 09:06 AM #51
    dwa911
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    Engine build continued...


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    first ride - 10 yrs old in a 73 911S - Silver - I was done for
    Started 'playing' with them in the late 80s
    Started racing a 72 911 T built to 2.9L RSR in SoCal SCCA, PCA, POC early 90s
    Have owned over 50 long hoods from late 80s until 2000
    dropped out from 2000 - 2018 - due to life, work, travel
    Been building a 2.8 'RSR' inspired car since 2018 - 9111121235
    http://forums.pelicanparts.com/porsc...1121235-a.html
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  2. 04-12-2024, 11:35 PM #52
    larwik
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    Skittles...

    The car looks Great and a nice engine build...Just in case, and with the risk of repetition! ...."Intermediate and chain gears all in spec"...as Ed M and Gled49 have mentioned in the past.... I hope they are "previously used" and not recently supplied as New sprockets by Porsche from "SEBRO"...But, hopefully this is old news and most people know this by now...
    Lars Wikblad...

    Early 911 "S" Registry # 527
    "R" Gruppe # 314
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  3. 04-13-2024, 06:16 AM #53
    dwa911
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    Thanks for the kind words and reminder Lars! Yep, all in spec and good used, not new...
    first ride - 10 yrs old in a 73 911S - Silver - I was done for
    Started 'playing' with them in the late 80s
    Started racing a 72 911 T built to 2.9L RSR in SoCal SCCA, PCA, POC early 90s
    Have owned over 50 long hoods from late 80s until 2000
    dropped out from 2000 - 2018 - due to life, work, travel
    Been building a 2.8 'RSR' inspired car since 2018 - 9111121235
    http://forums.pelicanparts.com/porsc...1121235-a.html
    Reply With Quote Reply With Quote
  4. Today, 02:56 AM #54
    dwa911
    dwa911 is online now
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    A few videos of first engine start, rough tune, then on the dyno with chart...

    TEST STAND





    DYNO RUN



    RESULTS with and without air filter

    WITH AIR FILTER

    PEAK Torque - 260.3 NM (192 ft lbs) @ 5400 RPM vs factory specs - 254.9 NM (188 ft lbs) @ 5100 RPM

    PEAK HP - 168.3 KW (225.7 HP) @ 6550 RPM vs factory specs - 156.6 KW (210 HP) @ 6300 RPM


    2.7 MFI Dyno Numbers Graph Overlay with air filter.jpg


    WITHOUT AIR FILTER

    PEAK Torque - 261.4 NM (192.8 ft lbs) @ 5600 RPM vs factory specs - 254.9 NM (188 ft lbs) @ 5100 RPM

    PEAK HP - 172 KW (230.7 HP) @ 6750 RPM vs factory specs - 156.6 KW (210 HP) @ 6300 RPM


    2.7 MFI Dyno Numbers Graph Overlay without air filter.jpg


    Interesting to see the peak torque and HP are slightly higher without the air cleaner (0.8 ft lbs and 5 HP difference), but both are slightly higher lower in the rev range with the air filter on the overlay graph... Also both with and without the air cleaner both peaks are higher than factory specs...


    2.7 MFI Dyno Numbers Graph.jpg


    FACTORY GRAPH FOR COMPARISON

    73RS-PowerCurves-r1066251929.jpg
    Last edited by dwa911; Today at 03:10 AM.
    first ride - 10 yrs old in a 73 911S - Silver - I was done for
    Started 'playing' with them in the late 80s
    Started racing a 72 911 T built to 2.9L RSR in SoCal SCCA, PCA, POC early 90s
    Have owned over 50 long hoods from late 80s until 2000
    dropped out from 2000 - 2018 - due to life, work, travel
    Been building a 2.8 'RSR' inspired car since 2018 - 9111121235
    http://forums.pelicanparts.com/porsc...1121235-a.html
    Reply With Quote Reply With Quote
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