Engines with OBDII and better computer controlled EFI and ignition behave very differently than carb/distributor builds. Supercharged/turbocharged/diesel engines go deeper in the hole as the boost goes up. Some TF engines have/had the piston .500" in the hole.robert1 wrote:My point is if the deck is good enough to seal and the builder sets the height via gaskets there will not be a measureable performance gain from decking. He is having this one decked so it's a moot point now. The .040 minimum quench is constantly quoted here. I just redid a 2006 5.4 Ford engine with .120 quench.
Bottom line - without full details of the build and the intended use, squish is just a number.
jack vines