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  1. #1
    Dani_B19's Avatar
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    81.5mm pistons, what cc would this be?

    As per title, would 81.5mm pistons give a 1900cc displacement or less?
    Driving the most secretive S3 on ASN

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  3. #2
    <tuffty/>'s Avatar
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    Stickies dude... big turbo info.. 83mm required for 1900 btw..

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    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  4. #3
    Dani_B19's Avatar
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    Sorry tufty, i should know better, while your hear, what would 81.5mm be, around 1850cc? Would it esn be worth the hassle?
    Driving the most secretive S3 on ASN

  5. #4
    Andrew@A.L.D's Avatar
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    Engine Displacement Calculator

    Don't forget you have a 86mm stroke

    Mine is 95.5mm
    RIP S3dave/David Marshall stickers now available
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    Sparco Torino 2 sport seats, None resonated Milltek exhaust,
    Adjustable FPR from 1-5 bar, 2 sets of Unused ARP 3/8 2000 rod bolts, relentless 200 cell cat pipe, Std AGU Crankshaft. Ported & Reconditioned Cylinder head service.

  6. #5
    Andrew@A.L.D's Avatar
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    Quote Originally Posted by Dani_B19 View Post
    what would 81.5mm be, around 1850cc?
    1795 cc
    RIP S3dave/David Marshall stickers now available
    FOR SALE
    Sparco Torino 2 sport seats, None resonated Milltek exhaust,
    Adjustable FPR from 1-5 bar, 2 sets of Unused ARP 3/8 2000 rod bolts, relentless 200 cell cat pipe, Std AGU Crankshaft. Ported & Reconditioned Cylinder head service.

  7. #6
    <tuffty/>'s Avatar
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    USING THE STOCK 1.8T BLOCK

    With using the stock 86.4mm crank, increasing bore size will give you the following:

    81mm bore = 1781cc- stock displacement
    81.5mm bore = 1801cc
    82mm bore = 1825cc
    82.5mm bore = 1847 (small 1.9L)
    83mm bore = 1870cc (1.9)
    83.5mm bore = 1892cc

    With using a 2.0T FSIor 2.0 AEG 92.8mm crank will give you the following:

    81mm bore = 1912
    81.5mm = 1936
    82mm = 1960
    82.5mm = 1984
    83mm = 2008
    83.5mm = 2032

    (taken from here... Lots of Big Turbo and High Power info!, which is in here... A3/S3 FAQ / How To's / Tuning Info STICKIES - PLEASE READ BEFORE POSTING)

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  8. #7
    Andrew@A.L.D's Avatar
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    Forgot the .4mm on the stroke of the S3 crank
    RIP S3dave/David Marshall stickers now available
    FOR SALE
    Sparco Torino 2 sport seats, None resonated Milltek exhaust,
    Adjustable FPR from 1-5 bar, 2 sets of Unused ARP 3/8 2000 rod bolts, relentless 200 cell cat pipe, Std AGU Crankshaft. Ported & Reconditioned Cylinder head service.

  9. #8
    Dani_B19's Avatar
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    So for the extra cost and work its not worth it is it?
    Driving the most secretive S3 on ASN

 

 

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