tachometer
#2
RE: tachometer
The tach is a reading of your RPM level or revolutions per minute of the engine. When u start hitting red, or red lining, start to overwork you engine. Not good. if you have an automatic then ya it would probally be a good idea to slow down , but with a manual its an indication to shift gears.
#5
RE: tachometer
If you have an automatic you wont really need to worry about a tachometer since gears are shifted for you. Now if you have a manual, its a nice feature to let you know if you arent revving to high. However, believe me, youll know if you are revving your engine too high... especially high enough to where it destructs. But in todays cars, that is unlikely because of a "rev limiter". Basically, it wont allow you to go above a certain RPM.
#8
RE: tachometer
you can also tell if your car is still running when your stereo is blasting off your ears. look at the tach, instead of hittin' the pedal to see if the car moves.. also much cooler than going to leave the light and slipping your clutch, cuz you cant hear your motor... i would not agree at all with shift points... red line is set at the point where your engine no longer produces viable power, or no increase.. usually caused by "valve float", meaning your valves can no longer seat themselves, so the combustion chamber can no longer seal, hence no power. the tach has nothing to do with points. those variate with weather, grade, driver preference, and lets face it, the drivers mood.