Increase compression or decrease compression?
09-03-2007, 09:40 AM
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Increase compression or decrease compression? Uhm...dumb question...I plan on purchasing an eagle 408CI rotating assembly and patriot LQ9 based 72cc heads. The eagle rotating assembly states that when used with 72CC heads and dish pistons the compression ratio would be 8.6 or 10.6 with flat top pistons. I plan on using a power adder and would like compression ratio of 9.5. In terms of having the heads milled to 9.5 compression ratio would it be better to purchase the flat top or dish pistons.
09-10-2007, 08:44 PM
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around 9:5 should work great for a supercharger. i'd figure out what the cc of the pistons are and figure out what gasket you are going to run ( i suggest a .040 cometic) and then you can use a calculator to figure out what cc the heads need to be milled to.