So i have a stock B18B1 and i'm already bored with it but in the future i plan on building an all-motor b-series (although a k-series setup would be cheaper and more powerful in the long run i will never make enough power in this vehicle to find useful since it it a front-wheel drive layout) so i plan on using a 2000 USDM B18C1 block and 2000 JDM B18C5 head with P73-00(JDM B18C5) pistons and B18B1 rods and crank with a 2-layer headgasket. I was using C-speedracing.com's compression calculator and it calculated a 11.7:1 compression ratio. I was also reading on team-integra.net and found this "So you can make more power by improving burn efficiency via increasing the static CR up to a point. For street engines, the maximum static CR on pump gas is around 12.5:1 CR if you know how to tune. If you do not, the maximum is around 11.5:1 CR. For a race engine, the point at which cranking pressure causes negative work or parasitic friction and affects power output is around 14:1 CR. Alcohol-fueled race engines can afford to run 15-17:1 CR, since the alcohol cools the chamber and lowers both the cylinder temperature and detonation risk. Methanol race engines run much richer air-fuel ratios (around 5-6:1) than gasoline engines, as well." that being said i would believe the static compression ratio i want to run is safe and reliable as long as i treat it well as far as fluids and don't run it hard all the time and break it in correctly. Can i run 93 pump gas on this setup with a proper tune since the compression ratio is lower than 12.5:1 or do i need another type of fuel additive? Any input will be appreciated and rep will be given.