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KobaltBlau KobaltBlau is offline
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Join Date: Mar 2004
Location: City of Seattle, WA
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Here's another factor I thought of: A typical pentroof chamber like a 959 chamber has some squish area on 2 sides. a flat topped piston in a bore-sized hemispherical chamber has almost no squish. This may make a difference to preignition/detonation, but I don't know enough about the effects of squish.

Some 2 valve non-hemispherical chambers have really massive squish areas. Perhaps A Quiet Boom would have an opinion here too.

...And people say I talk to myself...Bah!
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Andy
Old 07-29-2004, 01:27 PM
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