Originally Posted by
Luva65wagon
I think the only one here, besides Kenny, who's actually done much work on their 6 is Gary (he's the one with the ignition queries of late). But he used a Classic In-lines head. He did do a lot of research in the beginning.
Yeah! I did do a lot of research early on. One of the tech articles on the Classic Inlines web site has to do with Dynamic Compression Ratio. It turns out to be more important than the Static Compression Ratio because it addresses how much of the intake charge is actually captured in the cylinder, and is significantly affected by the valve timing (when the intake valve closes). I created a spreadsheet that calculates the Dynamic Compression Ratio. If I you can provide the cam specs and the combustion chamber volume, the spreadsheet can compute the DCR. Once we get a baseline DCR, I think there are sources (Classic Inlines, Falcon 6 Performance Handbook?) which will give a head-mill vs chamber-volume relationship and we can get you to the right compression ratio.
Gary MacDonald
ROGER's...
EX... '63 Hardtop
Had...
Scarebird front discs
200 w/ CI alum head
C4
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