5.3l mild build up Head Milling
04-05-2010, 10:46 PM
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5.3l mild build up Head Milling I've got a 2004 5.3l tahoe with a 2004 ls6 cam. Im looking to replace the heads with the newer 5.3l heads with the 243 or 217 ls6 ls2 casting. Does anyone know how much they have to be milled to maintain the stock compression? I'd like to at least keep the stock compression if not increase it a bit. Stock 5.3 heads are 61.??-62.??cc but the 243's are 64.??cc cambers. Has anyone added these to a 5.3?
04-06-2010, 07:11 PM
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i know ls1 heads have to be milled 35 to equal 5.3 compression and im 99% sure ls1 heads are 66cc chamber so a ls6 should have to be milled i would thing between 25 and 30 to equal the 5.3
