depends on what you want out of it, and what you want to do with it, if you want a motor that will make butt loads of horsepower, but will have power lag. Or if you want a drag race/street car then go turbo. If you want bottom end off the line, and strong midrange, with instant responce then go with the JSRC. There are a lot of aftermarket parts coming out for the JSRC including pullies and screws. Will be very strong on auto-x type courses, and street courses.