Honestly, using effect to sound fast is a little bit like cheating. Of course, delay effects can make you sound really fast but it´s not it as when it´s only distortion and maby wah-wah. But, listen to Petruccis solo on Sourrounded (Images An Word). Talk about fast delay.

My advice to you is to keep on playng those runs until you can get them as fast as examples whitout delay. It´s possible so don´t give up ´cause you´ll be very proud of your self later.