How nice would high octane gas be?

Building an engine that requires higher octane than what's available from the pump is totally unnecessary nowadays. WIth the great flowing heads that are available along with good intakes, and other smart parts choices make a high octane street motor kinda stupid, really. Save it for the race track. Even then, there are a LOT of pump gas race motors out there. Using race gas where it's not needed can even cost power.

Agree 100%!! Not a single car manufactured today needs or wants more octane, and are designed to run on anything above what is commonly available! In the old days of big blocks and restrictive intake systems, more octane was needed to make the fuel burn longer, nowadays that is not an issue! A lot of the successful drag racers of today are using the E85, which is more stable, consistent, and very predictable! It's a science, and a science that is researched and developed with the very large dollars of the auto industry! Just pulling up to the pump and running higher octane, even in your high dollar motor build, is a guessing game, and almost always unnecessary!!

On the plus side, "racing gas" sure smells good, even my mom likes the smell of it burning!!! :)