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Originally Posted by Gage "it only takes .005" to change 1cc with piston deck height or head gasket."
does this mean that if my 5.3 heads are milled .015 then i now have a 58cc chamber ( i have 2.00/1.6 valves) |
Gage ... Just because you have 5.3 heads, does not mean your compression ratio will be the same as a stock unaltered 5.3 head.
Case in point: I have TEA 5.3 heads that were only milled .003" to insure straightness. But my heads were CCd at 63cc. When TEA ports the 5.3 head, the CNC machine removes material from the combustion chambers in order to unshroud the valves. This changes the chamber volume dramatically.
The only way you will know what your exact CR is ... Is to know exactly what the CC volume is in the chambers.
BTW, those numbers posted above are assuming stock 5.7L displacement, stock block deck height, stock pistons and stock GM graphite head gaskets.
Ron,