View Full Version : Speedo on cars during hard acceleration
04-05-2005, 03:10 PM
I noticed when I gun the throttle on my manual tranny Toyota truck (and other cars I have owned) and then let off the throttle quickly, the speedo continues to inch upwards about 2-3 mph over the next second or so while coasting. My question is which speed is correct at the beginning of coasting, the reading at the instant of the lack of application of torque, or the reading at which the needle stops? Does it take a while for the needle to reach the proper speed (lag behind the actual speed during hard acceleration)? I know it is impossible to continue to accelerate without application of force, so this is curious. Also, is this supposed to happen? Does it happen on Corvettes and Vipers, Ferraris, ect?
04-05-2005, 03:15 PM
Sounds to me like lag, caused by inertia in the speedometer innards. So the correct reading for a given instant would be what you see one second after said instant. All speedometers would necessarily have some lag, but in some it's probably so negligible that it couldn't be discerned by the naked eye.
Captain Lance Murdoch
04-05-2005, 03:37 PM
I hope this is the last time I see the words "Speedo" and "hard" together in a thread title.
04-05-2005, 04:07 PM
I opened this thread to try to figure out why anyone would put a skimpy bathing suit on an automobile.
04-05-2005, 09:30 PM
I have to ask, just for my own curiosity... are you perhaps spinning the wheels a little when you do this?
04-06-2005, 08:05 AM
I opened this thread to try to figure out why anyone would put a skimpy bathing suit on an automobile.Haven't you ever seen these (http://www.nutsfortrucks.com/)?
Paul in Qatar
04-06-2005, 08:27 AM
I must resist the temptation to buy some of those things to be covertly attacked to some unknown person's truck at the local mall. That would be wrong. Very funny but wrong.
04-06-2005, 02:15 PM
I wonder how Freudian your substitution of attacked for attached was in that sentence, Paul.
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