I’ve recently been researching how engines and transmissions work (Im a novice) and I was curious about what determines a vehicles top speed.
Whilst trying to figure out gear ratios, I asked myself, why can’t a normal road vehicle reach redline in the highest gear.
I’m finding it hard to formulate the correct question as my knowledge is extremely limited but here it goes.
If a vehicle is in neutral, applying enough gas (and air) will increase the engine speed to red line. So why does a connected transmission limit the speed of the engine depending on the gear? I assume you could normally redline in first gear, but probably not in the highest gear. If it is to do with external forces, then if I was to raise a car off the ground, could I reach redline in the highest gear?