MY 85 GN , to me is fairly quick ,my buddy rode in it the other day, and he was wondering why he could'nt hear the Turbo whistle , I told him I thought it was beacause , the stock turbo is kinda small. I do have a exhaust leak , but it is after the cat . I do feel some boost, the adjustable wastegate is not cranked all of the way down, so I am not running max boost. Help , this is my first Turbo car, and have only heard one other GN in my area , sounded like a jet fighter, that is part of the reason why I bought one, but his was a built to the hilt 87 , with a turbo that looked more 2 or 3 times bigger than mine. Thanks for any info. Sincerely Earl