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Most Reliable Way Of Getting 2.0l Out Of A Gsr?

Discussion in 'Engine Building' started by dvs_prelude, Feb 21, 2003.

  1. dvs_prelude

    dvs_prelude Senior Member

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    Sup everyone,
    I was wondering what would be the best, most reliable way to get 2.0L out of a GSR block.
    I'm planning on swapping the GSR crank with an LS crank and boring the cylinders to 84mm with GE sleeves.
    Then I thought, what if I just keep the GSR crank and bore the cylinders to 84.5mm with GE sleeves?
    What do you guys think? :unsure:
     
  2. B16

    B16 Super Moderator VIP

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    i would keep the gsr crank and sleeve/bore it... just do an 84mm bore, you'll be very close to 2.0L
     
  3. beau_safken

    beau_safken Senior Member

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    If i'm thinking correctly if you bore to 84mm your displacement with all the regulars would be 1.943 liters.
     
  4. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    84 mm bore x 89 mm stroke = 1972.869921 cc (LS crank)
    84.5 mm bore x 89 mm stroke = 1996.426368 cc (LS crank)
    84 mm bore x 87.2 mm stroke = 1932.969181 cc (GSR crank)
    84.5 mm bore x 87.2 mm stroke = 1956.049206 cc (GSR crank)

    My setup was 84.5 x 89, and the new setup will be 85 x 89 = 2020.122616 cc. I'm still retaining GSR stroke geometry though. :lol:
     
  5. B16

    B16 Super Moderator VIP

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    man, that thing will be a beast!! :) any headwork planned?
     
  6. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Later, when the credit card / checking account settles down again. The block rebuild is just a hurdle- but it's another step in the right direction, since I'm now getting an OEM crank girdle and oil squirters added to the mix. Headwork will happen- I'm targetting 300hp at the crank, or about 250hp at the wheels.
     
  7. dvs_prelude

    dvs_prelude Senior Member

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    Can you explain how you will be retaining GSR stroke geometry to the uneducated please? :D
     
  8. dvs_prelude

    dvs_prelude Senior Member

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    Is this gonna be a daily driver??? :eek:
     
  9. Domeskilla

    Domeskilla Senior Member

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    Yes, Mike's setup will be his daily driver.
     
  10. Domeskilla

    Domeskilla Senior Member

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    Custom rods. :) (Mike and I have talked a lot about his setup.. so i think i'm answering these questions right :))
     
  11. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Yup. Longer rods using pistons that have a higher wrist pin mount location- so I get the longer stroke of the LS crank with the GSR's stroke geometry, and I don't bang the pistons into the head. The ratio only changes from 1.54 to 1.58, so it's not anything eath shattering, but it does get a little better. I don't think it really matters. I'll lose a tiny bit of torque by reducing the piston speed, but probably not anything I'll notice, especially not with the slight bump in displacement. I lose some piston speed, but I'll gain 23cc over the last build.
     
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