Opening up the combustion chambers on 317s
11-21-2010, 02:56 PM
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Opening up the combustion chambers on 317s I am home-porting a set of 317 heads to use on my LS1. I want to keep the compression as low as possible especially since it looks like I am going to have to have the heads surfaced. Most posts I read when searching on here have to do with milling to reduce chamber volume/increase compression. I want to take material out of the chamber without hurting anything. Can anyone tell me where to cut and where not to cut? And how many CCs should I be able to remove safely?
11-23-2010, 06:09 AM
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I would like the CR to end up being as low as I can get it....was hoping for less then 9.5 I didnt CC the heads before I started but I did take some material out yesterday. I really have no concept of how much material equals 1 cc. I just opened the area arounnd the valves and took a little off the spark plug lump (left it the same basic shape, just smoothed it. Then I smoothed the rest of the chamber. Not sure when I will get a chance to cc them but I hope I al least made some kind of difference !!
