hey everybody,
I'm new to the forum, and I need some help...I'm looking for some direction. I just got a 1986 BMW 528e

. I'm pretty happy. But I was wondering if you all know of any cheap speed/performance upgrades for the car. It runs like a 10 second 0-60, which isn't painful, but I'd like some more speed, you know? Can anyone suggest anything?
(My friend also said he thinks I should try a different bimmer engine, he'd put it in for me. But I don't want to lose the awesome mpg. please help)