chrisprater Posted February 18, 2013 Report Share Posted February 18, 2013 hey guys, just wondering if anyone has cnc port and polished there stock heads and had them milled down. just wondering if it helps any on these trucks and if it was worth doing. Thanks, Chris Prater Quote Link to comment Share on other sites More sharing options...
Blown 346 Posted February 18, 2013 Report Share Posted February 18, 2013 Yes it does help. Opening up any cylinder head will help. Quote Link to comment Share on other sites More sharing options...
GI.SS Posted February 18, 2013 Report Share Posted February 18, 2013 Milling will Bump compression up but causes ptv issues. Quote Link to comment Share on other sites More sharing options...
chrisprater Posted February 18, 2013 Author Report Share Posted February 18, 2013 so should i just cnc polish and port them and not mill them? what kind of ptv issues will milling cause. So these are not able to be milled without modifiying other engine parts? Quote Link to comment Share on other sites More sharing options...
GI.SS Posted February 18, 2013 Report Share Posted February 18, 2013 Milling will limit your cam options as your valves will be (when fully extended) closer to your piston. Unless you feel like fly cutting. If you want to run higher compression ratios it's much more easily attainable with a set of 243's Quote Link to comment Share on other sites More sharing options...
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