i have a 96 mystic cobra and im getting ready to add some boost. it has a fully built bottom end with stock 9.85 compression diamond pistons. i was told the most i can run on pump gas safely is around 14-15psi. is this true? im looking at more like 17-18psi if i can but i wanna stay on pump gas. this car gets street raced A LOT and i need it to hold up through some brutal ****. any info would be appreciated. thank u