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Need some info on milling 243s....

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Old 07-24-2013, 09:55 AM
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Default Need some info on milling 243s....

Ok guys so i'm getting ready to mill my 243s what mill would be safe to get close to 56cc?
I got told to do a .055 mill but not sure if it would be safe...Dont want to run into intake alignment problems...Btw the heads will go on a 2010 4.8
Old 07-24-2013, 10:21 AM
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Mill em to 30 i think 55 is too much unless u wanna fly cut pistons
Old 07-24-2013, 01:51 PM
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Originally Posted by 07 Z71
Mill em to 30 i think 55 is too much unless u wanna fly cut pistons
Is that expenaive? This is gonna be my 1st time so dont know much about heads
Old 07-24-2013, 02:32 PM
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Bump...
Old 07-24-2013, 03:24 PM
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Originally Posted by badboy956
Is that expenaive? This is gonna be my 1st time so dont know much about heads
What the milling? Shouldnt be more than 150-200 the most
Old 07-24-2013, 05:43 PM
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Originally Posted by 07 Z71
What the milling? Shouldnt be more than 150-200 the most
No the flycut pistons?
Old 07-24-2013, 05:54 PM
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I have to agree, .030" is about the safe limit for 243 heads. Flycutting the pistons might help with valve to piston clearance, but it also increases the compression ratio too. So, it seem rather counter-productive with what you want to accomplish.
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