Re: BBC compression mapping
Remember their are margins of air in the manufactoring of parts.....Cam lobes may be set for the number one cylinder but the rest may be off do to error in cam grind etc....
The valve stem of the number one valve needs to be the same height as the rest as it is part of the measurement the way I've discussed above.
Also remember that their is strech in the timing chain of about 1 degree after intial breakin.
Carbon will also eventually take its place on the pistons and combustion chambers slightly raising the compression.
Make sure you can sleep at night as everything will not be perfect but it sure is fun trying!!!!
Jim
PS...........It is a sick world.
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1970 LS-6 Chevelle
Going fast on Goodyear Polyglas.
12.21 @ 115.32 PSMCDR 2009
12.24 @ 114.30 PSMCDR 2010
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