Is there any effect on the speed?

Question

what will happen when i drive a car and shift the gear without lifting the acceleration pedal? (manual transmission car)

Answer 1

What happens is that the RPM's will increase and then when you shift into the next higher gear, the car will surge forward when you release the clutch.  It's a good way to shorten the lifespan of the clutch.

Answer 2

none... you are just wasting gas. once shifted and you release the clutch, your car will accelerate.

Answer 3

people that race do that.  it's bad on gas, and clutch, but overall gives you a quicker shift.