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Thread: ‘71T 2.2 HP upgrade options.

  1. #11
    Senior Member M_deJong's Avatar
    Join Date
    Jan 2011
    Location
    DFW TX
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    664
    Quote Originally Posted by geneulm View Post
    if you HAVE to rebuild, there are some pretty proven, reliable combinations that will get you into the 170s and have a very nice motor... and nowhere even close to overmotoring the car. And keeping the case you have w/out boatloads of machine work, twin plugging etc.

    Starting with a 2.4 by adding long stroke crank and rods from a 2.4/2.7

    E or solex cams.

    New 2.2 (still will be a 2.4) piston/cylinder combo to get you into the 9.5 range.

    03-19-2015 08:51 PM
    This is the route I took in my ‘71 searching for more fun... and torque. I had a 2.7 crank and rods so that helped the decision. I went with Biral cylinders bored to 85mm and new 9.5 pistons, which I think are more like 9:1 in use and E cams. Result is a more revvy engine with gobs of torque, but not a high rpm screamer since I kept the small port heads.
    Mike de Jong | PCA - Early S - R Gruppe | '71 911T 2.4 Tangerine | '74 911S 3.2 Ice Green

  2. #12
    Senior Member
    Join Date
    Mar 2013
    Location
    Einsiedeln, Switzerland
    Posts
    370
    I bought a 79 3.0SC engine. Quick and cheap... And then started tuning it. Its now a 3.2SS running 46 PMOs

    Regarding the point about S calipers. Are they actually any better, or just lighter?

    Paul

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