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displacement

Discussion in 'Engine Building' started by :stuntstere:, Jan 30, 2005.

  1. :stuntstere:

    :stuntstere: Junior Member

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    I was wondering how much you could bore out a sleeved b18c1 engine and still maintain a strong cylinder wall for boost and also how much could you stroke it and have no clearance problems. Thanks for your input.
     
  2. ahedau

    ahedau Senior Member

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    shoot for 84.5mm bore.

    You can go more if you didn't boost it but 84.5 with boost is ideal.
     
  3. beerbongskickass

    beerbongskickass Senior Member

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    I wouldn't bore it out that much. Leave a little room so you can do a few rebuilds.
     
  4. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    I'd go ahead and run an 84.5mm bore. If you're not too great at engine building and you're worried about rebuilds, you might want to go for 83mm, maybe 84mm. I would boost up to 85mm bore, and starting at 84mm gives you 2 rebuilds left in the sleeve- 83mm gives you 4 rebuilds. Don't increase your stroke unless you want to add on a deck plate. Sure, you could run higher pin pistons, but you generally want a good amount of material in the piston crown on a high power boosted application- and raised pin pistons tend to be thinner up top and have weaker ring lands.
     
  5. pissedoffsol

    pissedoffsol RETIRED

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    screw stroke.

    use your boost.

    you can EASILY hit 700 whp on a STOCK dimension (stock 81mm bore, stock stroke) with the proper build up, turbo setup, and fuel management.
     
  6. :stuntstere:

    :stuntstere: Junior Member

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    Thanks for the information. You guys have been a lot of help.
     
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