I have a pristine '93 Impreza with 2wd, a 5 speed and the 1.8 engine. Love the car but it is slow, too slow for me. I would like to increase the performance and driveability without repalcing the engine. Anyone had any experience with hopping up this engine ? Nothing radical, I just want it to be at least adequate for traffic conditions. It is painfully slow, especially with the AC on. Thanks!