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Old 04-22-2004, 07:54 AM's Avatar is offline
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Check the archives of this Forum. This subject has been discussed in depth. One thing an engine with excessive quench area does is accumulate carbon on the piston tops. Also they are victim to a lazy flame pattern (incomplete/slow combustion of the charge). This is because a normal "squish" area creates a turbulance across the piston top to help keep deposits from building. The carbon deposits then will glow red hot under high load conditions causing pre-ignition, detonation and related problems. A good example is some of the early flathead engines. It was common to have to pull the heads and de-carbonize them. The deposits would get so bad they hit the cylinder head.
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