Ol' Ron
Well-known member
The unfortunate part of spread sheets iz: theoretical accuracy. In the real world you have to start measuring things. 25 years ago, before I wrote my book I measured sozens of cylinder heads and they were ALL OVER THE PLACE. At preseht I have to send one of my EAB heads out to have another .015: removed because I have..065" over the piston and I had already had .040: removed. Now maybe the machine shop didn't do that, so you have to measure it. Now, the reason I like to do this is to improve the turbulence in the chamber. This will improve throttle response and econmy, But Do very little to increase the compression. The increased turbulence will give a better fuel burn.