Gear ratios?! Watch
There is no minimum speed at which you have to travel when in a certain gear. Just if you're at 30mph in 5th gear, the car's going to be really sluggish if you try to accelerate.
A long ratio gearbox is suited for higher top speed, but it sacrifices acceleration.
If you have a PS3 and Gran Turismo 5 for it, the gear ratio customisation can mean the difference between winning and losing a race, but its far less effective in real life, plus i dont know anyone who has actually done it. Think its very very difficult for front wheel drive cars as well.
Right, I've got an 03-Micra, and I can do 30mph in 5th gear?! I'm just wondering what this means for my car. Can you explain it in layman's terms please, I don't really understand many of the technical terms :|
As far as I am aware, the bigger the engine, the less revs are needed to go at a certain speed in a certain gear. So while a 1.1L for instance will go at say 30 at 2.5k revs in third, then a 2.0L might go at 1.8k revs in third.
This means that your car can go at 1.5k revs in fifth at 30 without any major problem, but a higher rev car wouldn't. As long as the engine is not struggling / close to cutting out (or the opposite, and in the red on your rev guage), the you can go what speed you want in whatever gear you want.
Your car will be happy to poodle along in 5th doing 30 but I imagine if you try to gain speed quickly it will judder and strain the engine which is not good