In the first movie, they had the Delorean rev up with the emergency brake turned on and the speedometer revved up close to the magical 88mph. What I'm wondering is why they didn't just have the car do a brakestand to 88mph instead of trying to drive the Delorean to the same speed?
The car had to reach a velocity of 88 miles per hour. It had nothing to do with the speedometer hitting 88 miles per hour.
In the animated series episode Gone Fishin` Jules Brown (one of Doc Brown's sons) places a spare flux capacitor in a barrel. When the barrel falls over the waterfall and reaches 88 mph, the flux capacitor activities and moves Jules Brown through time (and space) before crashing at the bottom.