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Mustang Forums
2011-2014 Mustangs
Engine/Tuning
Cylinder needed milled, compression question
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<blockquote data-quote="03Sssnake" data-source="post: 13950770" data-attributes="member: 7121"><p>Doubtful that .004 thousands would result in much of a compression bump. The machine shop probably took off the minimum amount of material needed to true the heads.</p><p></p><p>However I am only getting back into the Ford side of things these days, so I am not sure with these castings. With my 243 GM castings, roughly every .0065 off = -1cc from the combustion chamber. I took .020 off to get to 11:1 up from 10.5:1. That was with GM MLS head gaskets being used.</p></blockquote><p></p>
[QUOTE="03Sssnake, post: 13950770, member: 7121"] Doubtful that .004 thousands would result in much of a compression bump. The machine shop probably took off the minimum amount of material needed to true the heads. However I am only getting back into the Ford side of things these days, so I am not sure with these castings. With my 243 GM castings, roughly every .0065 off = -1cc from the combustion chamber. I took .020 off to get to 11:1 up from 10.5:1. That was with GM MLS head gaskets being used. [/QUOTE]
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Cylinder needed milled, compression question
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