GPS Digital Speedometer

Post by **NafemanNathan** » Fri Jun 10, 2016 9:23 am

Is there an accurate yet inexpensive GPS Digital Speedometer that isn't a HUD on the market?

I'm pretty sure my OEM Speedo reading is out and that I'm actually going a fair bit faster than it would have me believe. I can't be bothered messing about with converter chips or the like, I'd just like a reliable plug'n'play digital readout.

There are plenty of £20-£30 GPS HUDs on ebay, but I don't want a HUD. That is the kind of price range I'm hoping for though. I've also got an app on my phone, but besides the fact I don't know how reliable it is, I don't want the hassle of having to turn it on and clamping my phone up each drive.

Post by **Merlin** » Fri Jun 10, 2016 9:44 am

What phone do you have? Could you not use apple or google maps satnav to tell you what speed you are doing? Just initially to see if your speedo is out.

Post by **NafemanNathan** » Fri Jun 10, 2016 9:55 am

I've got a Sony Android. I didn't know there was a speed readout on Google Maps ???? Surely though that would give the same readout as my Speedo app gives (pretty much), and like I say I'm not wholey sure how accurate that is. At the moment the app and my OEM speedo are different. I don't know which one is wrong though or if either is correct.

bennyboy · Post by **bennyboy** » Fri Jun 10, 2016 9:56 am

Have you changed the VSS at some point? I had to play about with a few after having my ATR LSD installed, as the speed was out. Just a thought.

Post by **NafemanNathan** » Fri Jun 10, 2016 10:02 am

I haven't touched the VSS. I assume it will be an ATR one as the lump and gearbox are from an ATR and it's been converted from an auto.

BrokenSpring · Post by **BrokenSpring** » Fri Jun 10, 2016 10:04 am

In android market, have a look for tomtom navigation.
https://play.google.com/store/apps/deta ... lay.navapp

It gives a 50 mile free trial of the full software and tells you the speed you are doing via gps.

Post by **NafemanNathan** » Fri Jun 10, 2016 10:15 am

Ok, so that leads me to asking how accurate/laggy are the GPS is in phones these days? Surely That TomTom app will give the same reading as the app I already have and the Google Maps app??? Do they use the same satellites?

Whereas a dedicated GPS Speedo (most of which cost over £100) can surely offer more accuracy?...

BrokenSpring · Post by **BrokenSpring** » Fri Jun 10, 2016 10:43 am

NafemanNathan wrote:Ok, so that leads me to asking how accurate/laggy are the GPS is in phones these days? Surely That TomTom app will give the same reading as the app I already have and the Google Maps app??? Do they use the same satellites?

Whereas a dedicated GPS Speedo (most of which cost over £100) can surely offer more accuracy?...

Yea the dedicated ones will definately be more accurate but will cost you. The TomTom app ive found to be the most accurate for me out of all the navigation apps and the delay is minimal.
You could just establish a baseline i supose with the app for free first to check if you are massively out or not.
For comparrison my speedo reports 2mph .. ish faster than the gps reports and around 2.5 mph at 70.

Post by **NafemanNathan** » Fri Jun 10, 2016 10:49 am

Oh that's pretty good then. Cool I'll give it a go. I'll compare between the app I already have and Google Maps as well.

Thanks for your help

You to Merlin and Bennyboy

bennyboy · Post by **bennyboy** » Fri Jun 10, 2016 11:02 am

No prob. FWIW, when I had issues, I used a GPS speedo app on the phone to get me by and it was perfect.
When I swapped the VSS gearing over, it 'confirmed' that it's now spot on.