Well if you havent blown your engine yet. Your fine for now. Get a wideband lambda sensor with a gauge and controller. Innovate lc1 isvery good. Can get them brand new on ebay for about £150. And on boost your afr should be about 12 to be safe. Anything higher can be a little risky. Hope that helps. Read up on this stuff before you buy anything or change the fuel pressure. Its better to run rich so your engines safe from detonation.