newer honda

[jlo]

i see alot of the newer honda civic's with the digital dash displaying the cars speed.
i was wondering if it's possible to get a digital display to be hooked up to an older car.
this way i can get a more accurate reading while driving.

[SmaartAasSaabr]

If your car is new enough to have an electronic VSS giving a signal to the speedo then it's pretty simple, as long as you know what the VSS is actually giving out. Or you could just buy an older car with a digital dash as well, they were popular in the 80's (but I hate them).

[TSi+WRX]

Alternatively, you could get a stand-alone GPS system that has a road-speed calculation feature (even the 9500i could fit this bill, if you ran it in that display mode).

Yet another alternative would be viable if your car is OBD-II equipped - there are plenty of stand-alone OBD-II based "vehicle information gauges" available. Examples would be the MSD DashHawk, GReddy Informeter, and similar products from Blitz as well as many other companies.

[Arashi666]

ive got a digital speedo on my OBD monitor, I also get a digital tach, TPS monitoring, water temp, IAT, and oh so much more. but mine is made by GReddy, only tuned for Japanese cars..... minus Mazda

[stray444]

ive got a digital speedo on my OBD monitor, I also get a digital tach, TPS monitoring, water temp, IAT, and oh so much more. but mine is made by GReddy, only tuned for Japanese cars..... minus Mazda

ouououououou, somebody thinks their special.

[hockey005]

i find that the my garmin the speed is slower than it says on the speedo...and this ratio increases as the speed increases

[TSi+WRX]

i find that the my garmin the speed is slower than it says on the speedo...and this ratio increases as the speed increases

I'm not that familiar with GPS technologies, but I do remember someone here (or maybe on one of the car-enthusiast Forums that I frequent) addressing the potential for errors induced by GPS "sampling rates."

It's also not quite perfect.

The same goes for OBD-II based measures (including datalogging) - differences from OEM wheel/tire combos (different rolling diameter) could also cause systemic error.

[PMoth]

i find that the my garmin the speed is slower than it says on the speedo...and this ratio increases as the speed increases

I'm not that familiar with GPS technologies, but I do remember someone here (or maybe on one of the car-enthusiast Forums that I frequent) addressing the potential for errors induced by GPS "sampling rates."

It's also not quite perfect.

The same goes for OBD-II based measures (including datalogging) - differences from OEM wheel/tire combos (different rolling diameter) could also cause systemic error.

My datalogger agrees dead on with my garmin. What Hockey005 posted is correct with most cars and motorcycles. It doesnt really matter if the speedo is digital or analog, they all read optimistic (assuming stock tire rolling diameter).

[jlo]

i have two gps they show the same speed but slower @ the same time on the dash it always 5 or 10 kms faster

[JDS]

First thing you learn about gauges when you go to the racetrack:

"Stop looking at the speedo, dumbass!!"