Looking for a set of heads for the new engine setup. Looking at tanz post on different LS heads.


243's seem to be the most sought after head. They have a combustion chamber of 64.45cc.


706's are a dime a dozen, and have combustion chamber of 61.15.



Wouldn't putting a set of 706's on any engine bigger then a 5.3 net more power then 243's because it would have a higher compression ratio?


I have been looking at ported 243 heads thinking I was going to gain power, but realistically, I'm going to lose compression because my 5.3 is smaller then a 5.7, so is it possible these will LOSE power over my stock crappy 706 heads? Or will the bigger port volume more then make up for the lack of compression? I'm looking for a set of N/A heads, was hoping to end up with a 10.5 or so compression ratio.