Display true speed (EX only) - Page 2

ianjay1956 · 16th November 2006, 14:10

Be careful when using GPS to compare speed with a speedo. A speedo (forgetting any error) measures absolute speed over the surface you are travelling on - irrespective of gradient. GPS measure speed over the surface of the earth and does NOT take into account any gradient.

So only compare them when you are on truly level ground

Sorry for the rather techie response!!

Pottsy · 16th November 2006, 17:32

Quote:

Originally Posted by ianjay1956

Be careful when using GPS to compare speed with a speedo. A speedo (forgetting any error) measures absolute speed over the surface you are travelling on - irrespective of gradient. GPS measure speed over the surface of the earth and does NOT take into account any gradient.

So only compare them when you are on truly level ground

Sorry for the rather techie response!!

Only if you care about a 0.09 mph error! See:
http://www.civinfo.com/forum/showpos...2&postcount=15

Ancient Nerd · 17th November 2006, 01:23

Quote:

Originally Posted by The Great Soprendo

Not having an EX you might call this sour grapes

, but I think I'm right in saying this figure is a horizontal speed, so only accurate if you're travelling on a totally level road: any gradient will render it inaccurate as a measure of ground speed.

I think that to get an error of the same order of magnitude as the likely speedometer error, you need to be going down (or up) a seriously steep hill - say Rosedale Chimney.

If anyone's worried about exceeding the speed limit there, please let me know when you plan to try. I'd love to come and spectate, but it would be a bit of a waste of a Civic.

czechplastik · 17th November 2006, 02:38

Quote:

Originally Posted by Maldax

Pottsy,

How on earth do you find these things? Have you been reading things the rest of us can't get?

I know, he must have found the hidden menu in the manual...

Bungle · 17th November 2006, 11:12

I think Pottsy just sits in his car and presses buttons randomly, holding down combinations and the likes until something strange happens...

Maldax · 17th November 2006, 12:13

Quote:

Originally Posted by Bungle

I think Pottsy just sits in his car and presses buttons randomly, holding down combinations and the likes until something strange happens...

Don't we all?? Not that I have found anything yet

Pottsy · 17th November 2006, 17:08

Quote:

Originally Posted by Bungle

I think Pottsy just sits in his car and presses buttons randomly, holding down combinations and the likes until something strange happens...

Well, I do fly an Airbus

Bungle · 17th November 2006, 17:22

Found any hidden menus on one of those, yet? I hope your are parked up when you try your random button bashing!

Pottsy · 17th November 2006, 17:27

There are so many hidden menus on that thing it's best to stay well clear.

On the Civ though, my research is a little bit more scientific...

blzb0b · 4th April 2007, 13:43

Quote:

Originally Posted by petecivic

i bet honda say the car does (for example) 0-60mph in 10s but is that speedo 60mph or correct GPS 60 hmmmmmmm...................

neither, independent calibrated equipment is used..

sco77harris · 27th May 2007, 17:27

changing the screen coulour is great - red for type r or blue for others

allan79 · 27th May 2007, 19:34

so there is no way you can use sat nav and see the speed at same time like you can on tom tom its bad enoughit dont show speed cameras lol

Pottsy · 28th May 2007, 01:47

Yes, simply use the car speedo and subtract the error.

Kremmen · 28th May 2007, 07:19

If you want true speed and cameras on the EX then you are talking the TalexLite as an additional accessory.

Charles_Harding · 28th May 2007, 13:15

Quote:

Originally Posted by Kremmen

If you want true speed and cameras on the EX then you are talking the TalexLite as an additional accessory.

http://www.talex.co.uk/talexlite/

......and very well priced as well!

"My local hospital - it's no place to be sick!"

Charles H.

sco77harris · 28th May 2007, 14:29

it would be possible to wire these in righT?

DUNCAN · 17th June 2007, 15:12

Picture 013.jpg What are the settings for,??????

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Pottsy · 17th June 2007, 15:47

They are for the software developer to inspect properties, make temporary changes and examine errors, so he can go back to the firmware, make changes and re-apply. So no use to us, I'm afraid.

Kremmen · 18th June 2007, 07:06

It would have been a bonus if Honda had applied a similar utility to the outside temperature gauge where you could set the car main speedo +/- so that we could get it accurate.

As someone has said here before, I was also alongside a C4 recently where my Talex was reading the true speed, I was reading 5mph higher but the C4 was spot on.

panasony · 1st July 2007, 15:28

Quote:

Originally Posted by Pottsy

I've found a way to display your true, exact speed, so you can see how much your speedo is over-reading at different speeds.

1. Start the car.
2. Go into the diagnostic menu.
3. Go into GPS Information.
4. Press the MENU button for about 5 seconds.

A new screen showing detailed GPS info will be displayed. At the top is the true GPS speed, shown to an accuracy of 0.1 mph.

On my car, at 70mph on the main speedo (held with the cruise control) the GPS speed is 65.7 mph.

I found out something else i went into diagnostics menu i highlighted the gps infomation on the menu then i held the menu button for 5 seconds and a new menu system came up and up the top it said for developers only i didnt touch anything but i just wondered if anyone else has discovered this

16th November 2006, 14:10	#21 (permalink)
ianjay1956 Valve Cap Join Date: 22nd June 2006 Posts: 25 Thanks: 0 Thanked 0 Times in 0 Posts iTrader: (0)	True Speed Be careful when using GPS to compare speed with a speedo. A speedo (forgetting any error) measures absolute speed over the surface you are travelling on - irrespective of gradient. GPS measure speed over the surface of the earth and does NOT take into account any gradient. So only compare them when you are on truly level ground Sorry for the rather techie response!!

27th May 2007, 19:34	#32 (permalink)
allan79 Wheelnut Join Date: 19th May 2007 Posts: 74 Thanks: 0 Thanked 0 Times in 0 Posts iTrader: (0)	sat nav speed so there is no way you can use sat nav and see the speed at same time like you can on tom tom its bad enoughit dont show speed cameras lol

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This thread is about: Display true speed (EX only), it's in How To at the Honda Civic forum Civinfo; Be careful when using GPS to compare speed with a speedo. A speedo (forgetting any error) measures absolute speed over the surface you are travelling ...

17th November 2006, 11:12	#25 (permalink)
Bungle Rocketship door handle Join Date: 3rd July 2006 Location: SE London/Kent Posts: 1,224 Thanks: 0 Thanked 0 Times in 0 Posts iTrader: (0)	I think Pottsy just sits in his car and presses buttons randomly, holding down combinations and the likes until something strange happens...

17th November 2006, 17:22	#28 (permalink)
Bungle Rocketship door handle Join Date: 3rd July 2006 Location: SE London/Kent Posts: 1,224 Thanks: 0 Thanked 0 Times in 0 Posts iTrader: (0)	Found any hidden menus on one of those, yet? I hope your are parked up when you try your random button bashing!

17th November 2006, 17:27	#29 (permalink)
Pottsy Administrator Civinfo master Join Date: 10th April 2006 Location: Leics Posts: 5,938 Thanks: 26 Thanked 243 Times in 130 Posts iTrader: (0)	There are so many hidden menus on that thing it's best to stay well clear. On the Civ though, my research is a little bit more scientific...

27th May 2007, 17:27	#31 (permalink)
sco77harris Supporter Magic Rear Seat Join Date: 5th June 2006 Location: stanmore london Posts: 974 Thanks: 0 Thanked 0 Times in 0 Posts iTrader: (0)	changing the screen coulour is great - red for type r or blue for others

28th May 2007, 01:47	#33 (permalink)
Pottsy Administrator Civinfo master Join Date: 10th April 2006 Location: Leics Posts: 5,938 Thanks: 26 Thanked 243 Times in 130 Posts iTrader: (0)	Yes, simply use the car speedo and subtract the error.

28th May 2007, 07:19	#34 (permalink)
Kremmen Krem de la Krem Civinfo guru Join Date: 7th January 2007 Location: West London Posts: 3,129 Thanks: 20 Thanked 25 Times in 24 Posts iTrader: (0)	If you want true speed and cameras on the EX then you are talking the TalexLite as an additional accessory.

28th May 2007, 14:29	#36 (permalink)
sco77harris Supporter Magic Rear Seat Join Date: 5th June 2006 Location: stanmore london Posts: 974 Thanks: 0 Thanked 0 Times in 0 Posts iTrader: (0)	it would be possible to wire these in righT?

17th June 2007, 15:12	#37 (permalink)
DUNCAN Supporter Triangular Exhaust Join Date: 7th June 2006 Location: tameside Posts: 392 Thanks: 1 Thanked 2 Times in 2 Posts iTrader: (0)	Picture 013.jpg What are the settings for,?????? Picture 014.jpg Picture 015.jpg Picture 016.jpg Picture 017.jpg Picture 018.jpg Picture 019.jpg Picture 020.jpg Picture 021.jpg Picture 022.jpg Picture 023.jpg Picture 024.jpg Picture 025.jpg

17th June 2007, 15:47	#38 (permalink)
Pottsy Administrator Civinfo master Join Date: 10th April 2006 Location: Leics Posts: 5,938 Thanks: 26 Thanked 243 Times in 130 Posts iTrader: (0)	They are for the software developer to inspect properties, make temporary changes and examine errors, so he can go back to the firmware, make changes and re-apply. So no use to us, I'm afraid.

18th June 2007, 07:06	#39 (permalink)
Kremmen Krem de la Krem Civinfo guru Join Date: 7th January 2007 Location: West London Posts: 3,129 Thanks: 20 Thanked 25 Times in 24 Posts iTrader: (0)	It would have been a bonus if Honda had applied a similar utility to the outside temperature gauge where you could set the car main speedo +/- so that we could get it accurate. As someone has said here before, I was also alongside a C4 recently where my Talex was reading the true speed, I was reading 5mph higher but the C4 was spot on.