Displacement expansion 3.0 SC to 3.6

  • Hi guys,

    Does anyone here have experience with building a 3.0 SC block with 3.6 pistons/cylinder from the 964?

    fokke

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    911 SC, MJ 78, USA, 930/04
    944 S2, MJ 91
    Honda Zoomer Tokio Style

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  • 964's have a different pitch of the studs/dilas -- further apart.

    The sealing surface at the bottom is different.

    Anyone who wants to build a 3.6 engine -- based on SC block:

    964 KW,

    100 Mahle Ko/Zy -- these are available for the G-model.

    The block must then be spindled on at the bottom -- barrel dimension is different.

    What project do you have in mind?

    3.2 short stroke too lame? :])

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    Nur wenn du schwarze Striche vom Kurvenausgang bis zum nächsten Bremspunkt ziehen kannst, hast du wirklich genug Leistung(Mark Donohue).

    Im Alter wird man immer knackiger -- da knackt es und da knackt es...

    Sechs 964er bisher mit abgerissenen Dilas --- 14(!!!) Ventilfederbrüche bei den letzten 5 Motoren! 4:3:3:1:3

    Porsche 911 -- der Volkssportwagen...

    "Hoffnung -- ist immer ein Mangel an Information!"

    Wer restauriert -- verliert...

  • The pitch of the stud bolts was changed 2x:

    2,0L-2,7

    3,0L-3,2 and 3,3 Turbo

    and from 3,6L

    This post has been automatically translated.

    Nur wenn du schwarze Striche vom Kurvenausgang bis zum nächsten Bremspunkt ziehen kannst, hast du wirklich genug Leistung(Mark Donohue).

    Im Alter wird man immer knackiger -- da knackt es und da knackt es...

    Sechs 964er bisher mit abgerissenen Dilas --- 14(!!!) Ventilfederbrüche bei den letzten 5 Motoren! 4:3:3:1:3

    Porsche 911 -- der Volkssportwagen...

    "Hoffnung -- ist immer ein Mangel an Information!"

    Wer restauriert -- verliert...

  • And with the K-Jetronic it will be difficult to impossible. Then you need a new injection system with free programmable STG, dual ignition and best still single throttle or even better flat valve <lechz>.

    Ruf CTR Does it have to be a 964 KW? Such a thing is meanwhile also weighed out in gold...

    Greeting, Thomas

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    81er ex-US 911 SC Coupé, platinmet., eSSD, K-Leder sw., Turboheckflügel & -frontspoiler, NSW, Maxilite 7/8J, Bilstein Fw("SpoStra" - noch...), 915/61, 930/16 o.Kat, WebCam 20/21 NW, hydr.KS, Dansk 92.502SD, 123 Ignition, orig. Porsche SWV, Seine Systems Gate Shift Kit, Momo Prototipo m.Nabenerhöhung


    „Nicht das Auto verdirbt den Charakter, aber wer keinen Charakter hat, sollte nicht Auto fahren.“

    Ferdinand Porsche

  • If you want to get 3.6L, you can't get around a 964 shaft.

    This is only possible with used parts.

    We don't know which project it is -- so the mixture preparation is yet another topic....

    This post has been automatically translated.

    Nur wenn du schwarze Striche vom Kurvenausgang bis zum nächsten Bremspunkt ziehen kannst, hast du wirklich genug Leistung(Mark Donohue).

    Im Alter wird man immer knackiger -- da knackt es und da knackt es...

    Sechs 964er bisher mit abgerissenen Dilas --- 14(!!!) Ventilfederbrüche bei den letzten 5 Motoren! 4:3:3:1:3

    Porsche 911 -- der Volkssportwagen...

    "Hoffnung -- ist immer ein Mangel an Information!"

    Wer restauriert -- verliert...

  • Or you build a completely new engine on a new(!) billet crankcase...all a question of money....

    https://noonanrace.com/products/911-porsche-case

    12500$ + 10k for the crankshaft plus the rest of the necessary equipment makes 50k... that's how much a new AMG 6.3 V8 engine costs ...

    Greeting, Thomas

    This post has been automatically translated.

    81er ex-US 911 SC Coupé, platinmet., eSSD, K-Leder sw., Turboheckflügel & -frontspoiler, NSW, Maxilite 7/8J, Bilstein Fw("SpoStra" - noch...), 915/61, 930/16 o.Kat, WebCam 20/21 NW, hydr.KS, Dansk 92.502SD, 123 Ignition, orig. Porsche SWV, Seine Systems Gate Shift Kit, Momo Prototipo m.Nabenerhöhung


    „Nicht das Auto verdirbt den Charakter, aber wer keinen Charakter hat, sollte nicht Auto fahren.“

    Ferdinand Porsche

  • Hello,

    46 PMO or WEBER :drive:

    when it's time....

    Arrgh! No! I'm against that! There are so nice free programmable ECUs ... an H license plate is no longer available with such a conversion anyway. Then you can tune the engine accordingly.

    To come back to the TS question:

    I would go instead of 3.6 on max. 3.2 or 3.3 l, that goes then probably still just so the K-Jetronik, as well as with 3.0l SC KW, then still SSI, other NW, programmable ignition, large ports (if not already available), and then haste affordable real 240-250PS. And H license plate should also work. Which BJ is the car? If it is a MJ 80 or older - the exhaust may still deviate 25dbA from the registered value! From 1981 it's then only 5dbA! Would be also a possibility...

    Greeting, Thomas

    This post has been automatically translated.

    81er ex-US 911 SC Coupé, platinmet., eSSD, K-Leder sw., Turboheckflügel & -frontspoiler, NSW, Maxilite 7/8J, Bilstein Fw("SpoStra" - noch...), 915/61, 930/16 o.Kat, WebCam 20/21 NW, hydr.KS, Dansk 92.502SD, 123 Ignition, orig. Porsche SWV, Seine Systems Gate Shift Kit, Momo Prototipo m.Nabenerhöhung


    „Nicht das Auto verdirbt den Charakter, aber wer keinen Charakter hat, sollte nicht Auto fahren.“

    Ferdinand Porsche

    Edited 2 times, last by Schulisco (January 10, 2023 at 7:18 PM).

  • What project do you have in mind?

    3.2 short stroke too lame? :])

    With the 3.2 short stroke I was actually satisfied ... until the other day an unpleasant rattling occurred: Cylinder 5 has lost a circlip of the piston pin. Piston pin has migrated into the cylinder wall and jumped out of the guide on one side of the connecting rod. :still:

    So there is a need for action. The engine could be repaired with a single 3.2 piston/cylinder. But I wonder if the conversion to 3.2 has been done so sustainably well (it is not the original Mahle 3.2 set for the SC mounted).

    This post has been automatically translated.

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    911 SC, MJ 78, USA, 930/04
    944 S2, MJ 91
    Honda Zoomer Tokio Style

    ---------------------------------------

  • Carburetors are the vollkomene nonsense nowadays, hardly really performance in proportion, but fuel consumption to the drop.

    For the money you put into a 3.6 project, I would build the 3.2 with single throttle EFI and complete electric engine control, maybe even with dual ignition. If the fuel is available in all areas with the right amount, an electronic map-based ignition can bring again so much. But this must be speed- AND load-based, then the fun starts, and over all speed ranges AND load conditions.

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    Alles über den 3.0 US SC Motor 930.16 und viel mehr unter:

    https://nineelevenheaven.wordpress.com/


    - 911 SC 3.0, USA Bj 82, unischwarz, SSIs, eigens entwickelte digitale Lambdaregelung sowie elektronische Kennfeld-gesteuerte Zündung
    - VW Oval-Käfer Export, Bj 1955, 30PS, Stratosilber
    - VW Brezel-Käfer, Bj 1950, 24,5 PS, Grau, orig. Philips Elomar Radio