Originally posted by Adoika
A 2-stroke will wind out alot quicker which gives it much quicker acceleration, but in the long run, a 4 stroke of the same size will have almost twice the top-end of the 2-cycle.
Uhhhhmm.... no...... that's BS. A 4 stroke has much more torque, which will accelerate out of a corner faster than a 2 stroke. RC Car Action has done a lot of tests on this in previous issues. Why do you thing airplanes use 4 strokes??? Torque....
On the other hand..... a 4 stroke will run out of leg on the top end- it has much heavier components to spin, and the RPM range is much narrower than a 2 stroke. Two strokes are running 42K+ rpm these days!! There is no 4 stroke that is going to match that RPM. Do the math, and tell me what will run FASTER on the top end.... assuming both engines are running through the same drivetrain. If the gear ratios are the same, and the 2 stroke will out RPM the four- the 2 stroke will be faster. I don't care if the 4 stroke has twice as much horsepower- if it's doing less RPM than a two stroke (geared with the same final drive) it will be slower- period.
It's simple physics......