QUOTE(alkt @ Aug 1 2008, 06:15 PM)
tonight how?
my car is 110km/h at 3100 rpm
Tonight not free leh....
My car is 110km/h at 2700 rpm.
Added on August 1, 2008, 6:51 pmQUOTE(imperialrealcs @ Aug 1 2008, 06:40 PM)
to all the pro, im a little dumb to comprehend all the super word here lol
so would like to ask..
if ori 13" rim can cover 1m per revolution
so a 15" can cover 1.15m per revolution correct?
that means in actual speed, taking 13" as relative figure
100km/h in 13" = 115km/h in 15" but the meter in 15" still showing 100km/h?
please dont bother about the actual figure, juz a sample
Again, you are thinking about tyre. Speedometer takes the reading from gearbox, not the tyre. To the speedometer, your tyre only turned 1 revolution. It does not car how far you traveled because the calculation has been set by the manufacture to take the revolution of the tyre and calculate based on a preset of formula done by the manufacturer.
That is why when you change to a tyre that does not match your OEM overall diameter (OD), then your speedometer will no longer as accurate. The speedo will still show you the same speed (number of tyre revolutions still same) but you are traveling faster (if you have bigger tyres).
Understand now?
Edited: Going to use your formula..
if ori 13" rim can cover 1m per revolution
so a 15" can cover 1.15m per revolution correct?
-Correct but it is still 1 revolution of the tyre.
that means in actual speed, taking 13" as relative figure
100km/h in 13" = 115km/h in 15" but the meter in 15" still showing 100km/h?
please dont bother about the actual figure, juz a sample
-Correct because if it took 100 revolutions to reach 100km/h in 13 inch, it also takes 100 revolutions to reach 115km/h in 15".
-Your speedo is based on the 100 revolutions and not the distance.
-Understand now? (Ignore figures.. ahahha)
This post has been edited by sleepwalker: Aug 1 2008, 06:56 PM