Ok, I run M/T ET Streets on my Cutlass (3700 lb. with me) whats a good tire pressure to race with. I just can't seem to get this thing to hook up right. My 60 ft. stinks and are very inconsistant. People tell me that 14-15 lbs. is way too low for this car. They say I should run upwards of 18lbs.. Could this be right?