I am trading my '89 240SX for a '87 RX-7 Turbo II this Saturday but I need a question answered first. The guy said when he got on the throttle, it would lose boost after a while. Like, when he would take off fast, the car would just lose boost during acceleration and wouldn't accelerate as fast as it should. To my understanding, that is the only problem dealing with the performance end of the vehicle. If you know what it is, or how to fix it, then tell me...also, if you know what it is, then how much would it cost to fix... even though I will probably fix it on my own. Thanks