In addition, the racers who use such heads will have the compression
chamber in the head milled to suit their purposes. Vizard's book goes
into great detail.
On Nov 30, 2008, at 10:38 AM, Brits'n'Pieces (Eric Frenken) wrote:
> ... and don't forget that a not flat piston makes a big difference.
> -----Original Message-----
> From: email@example.com
> [mailto:firstname.lastname@example.org] On Behalf Of Larry Daniels
> Sent: Sunday, November 30, 2008 6:25 PM
> To: Billy Zoom; William McLeod; Spridgets List; email@example.com
> Subject: Re: [Spridgets] Spridget heads
> Billy, you need to add the volume of the hole in the (compressed) head
> gasket as well as the volume of the cylinder above the rings to the
> of the combustion chamber. Then you add that total volume to the
> displacement volume and divide the sum by the cc/unswept cyl/head
> volume to get the CR. Unfortunately, I don't know what the gasket and
> unswept volumes are.
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