Quote:
Originally Posted by BLSTIC
Oh I see. Nascar used to run around 15:1 with very large quench pads and cams with basically zero overlap didn't they?
In this age of cnc everything, surely pistons can be machined so that even valves can form part of the squish pad? That would make for the ultimate in turbulence and small combustion volume
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Turbulence isn't always desired. Mazda's new gas engines will have something like a 16:1 compression ratio, and get away with this by having a stratified charge.