just got back from nopi in atlanta and my car ran like crap the whole way there. so i have some questions. i get the worst gas mileage on the street maybe 15mpg, but on the highway maybe like 25mpg. everytime i touch the gas a huge cloud of smoke about suffocates the person behind me and my back bumper is covered in sut. i burn oil like you wouldnt believe. i changed the valve seals not too long ago but that didnt fix it. the kid who had the car before me bored it out and i think that may be the oil problem but im not sure. if anyone knows whats goin on please help. motor is a 95 gsr with 81.5 high compression pistons, aem fuel rail and fpr at 40lbs idle. walbro 255 fuel pump, and 355 injectors