reversing pistons Reply #15 – November 30, 2007, 12:50:52 PM About 10:1 or so. My GT40Ps have 60 cc chambers and the bore on my 5.0 is .030 over (306) According to the machiene shop that built the engine it's got close to if not a bit more than 10:1 compression. I run 93 with the timing set at 14* with no knock problem. Quote Selected
reversing pistons Reply #16 – November 30, 2007, 12:52:57 PM solid, so thats probably about where mine will be if i do all that. thanks guys-Keith Quote Selected
reversing pistons Reply #17 – December 01, 2007, 07:20:58 AM This is interesting never heard of this before. Quote Selected
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