The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 47-55.1 Dolphin gauge w gps 1950 AD

**mr48chev** · 05-03-2020, 02:41 PM

I'm not finding a set of instructions but most GPS speedometer/odometers are pretty easy to set up and are spot on accurate.

You might have issues in tunnels, or in a city with tall buildings blocking the signal for a bit but other than that they work good.

No issues with tire size changes or gear ratio changes.

I have used my hand held GPS that I have for my boat, the dash mount car gps that I have had for years or my phone's GPS speedometer app in my ot truck as a speedometer since that truck's speedometer is broken. All work equally well except when there is actually something blocking the signal and the odometer functions seem to pick right back up and stay accurate. I know one guy who use the phone app speedometer to drive clear across the country and back last year. That said I don't really see an issue with the GPS speedometers and the best part is you don't have to fight with calibrating them like you do with a mechanical speedometer.

05-03-2020, 02:41 PM	#2
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,838	Re: Dolphin gauge w gps 1950 AD I'm not finding a set of instructions but most GPS speedometer/odometers are pretty easy to set up and are spot on accurate. You might have issues in tunnels, or in a city with tall buildings blocking the signal for a bit but other than that they work good. No issues with tire size changes or gear ratio changes. I have used my hand held GPS that I have for my boat, the dash mount car gps that I have had for years or my phone's GPS speedometer app in my ot truck as a speedometer since that truck's speedometer is broken. All work equally well except when there is actually something blocking the signal and the odometer functions seem to pick right back up and stay accurate. I know one guy who use the phone app speedometer to drive clear across the country and back last year. That said I don't really see an issue with the GPS speedometers and the best part is you don't have to fight with calibrating them like you do with a mechanical speedometer. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.