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B16a1 Sleeved To 1.8l

Discussion in 'Engine Building' started by blacura93, Apr 29, 2003.

  1. blacura93

    blacura93 Junior Member

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    i plan on boring out my engine and sleeving it to a 1.8L, and i was just wondering what other modifications would be needed to accomodate this change?
     
  2. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

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    pistons
    rings
    head gasket
     
  3. K2e2vin

    K2e2vin Senior Member

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    to get it to 1.8L you would need a 86mm bore, which means 86mm pistons, which is somewhat rare.
     
  4. liquid00meth

    liquid00meth Senior Member

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    more standard is 85 I believe
     
  5. blacura93

    blacura93 Junior Member

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    i was going to replace all the internals, i did not know that 86mm was that rare, i have not found them yet but was going to begin looking soon. if 85mm are more common, what would be my options with boring it to an 85mm? would it be just under 1.8L? would it be a good thing to do, or should i just find the 86's and continue with that?
     
  6. TRuggiero_

    TRuggiero_ Senior Member

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    How does performance differ from boring a motor to 1.8 and stroking a motor to 1.8?
     
  7. B16

    B16 Super Moderator VIP

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    generally when getting displacement by boring you'll yeild higher high rpm gains
    when getting displacement by increasing the stroke, you'll yeild higher low rpm gains
     
  8. TRuggiero_

    TRuggiero_ Senior Member

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    For a good 1/4 would you suggest stroking or boring?
     
  9. B16

    B16 Super Moderator VIP

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    i would think stroking, to help with low end and launching.
     
  10. K2e2vin

    K2e2vin Senior Member

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    both--get a stroke close to 80mm; like a b17 crank that is 81.4mm, then rebore to 85 or 84.5mm. displacement is very good. r/s ratio for the b17 crank with b16 block is around 1.62, which is better than the b18c! with that combo, you would get a displacement of around 1848cc with the 85mm bore.
     
  11. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    B20A crank + 86mm bore > *.*
     
  12. blacura93

    blacura93 Junior Member

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