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Best way to check if your speedo is out 

 

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 Post subject: Best way to check if your speedo is out
Posted: Tue Feb 05, 2013 8:19 am 
Getting Side Ways
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Hi fellas everytime I drive my el I feel as though my speedo is out because all the cars around me seem to be flying past. What is the best way to check if my speedo is out?
besides driving along side someone?

Thanks in advance
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 Post subject: Re: Best way to check if your speedo is out
Posted: Tue Feb 05, 2013 8:34 am 
Getting Side Ways
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Ride: 1997 EL XR6

Power: 180 rwkw

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I know its a bit crude but you can compare your speed against the speed on a GPS, as the GPS will be more accurate then the speedo.
Someone will probably have a better way but this works well for me.

 

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 Post subject: Re: Best way to check if your speedo is out
Posted: Tue Feb 05, 2013 8:39 am 
Getting Side Ways
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Yeah I thought of that one. But last time my car got broken into the dirty scums stole my GPS :(
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 Post subject: Re: Best way to check if your speedo is out
Posted: Tue Feb 05, 2013 8:49 am 
Getting Side Ways
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Ride: 1997 EL XR6

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That's unlucky then lol. If you have an IPhone you can download the Tom Tom app and use that or borrow one?

 

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Next: Pacemaker Comps, 6 Individual Throttle Bodies, ICE Coil and ignition

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 Post subject: Re: Best way to check if your speedo is out
Posted: Tue Feb 05, 2013 8:59 am 
Getting Side Ways
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I was hoping for some other options. Worst case I will have to get it a go!
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 Post subject: Re: Best way to check if your speedo is out
Posted: Tue Feb 05, 2013 9:03 am 
Getting Side Ways
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Ride: 1997 EL XR6

Power: 180 rwkw

Location: Melbourne
VIC, Australia

You might even be forced to take it to a speedo shop, but that might be expensive?

 

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MGW Short Throw Shifter, CVE Cam, CVE Head, SS Big Mouth Air Intake, Pacemaker Headers, 3" Exhaust, 3" Varex, 3" Cat, 19" Silver Agents, EMS Stinger 4424, 42lb Injectors and Walbro 255lb Fuel Pump

Next: Pacemaker Comps, 6 Individual Throttle Bodies, ICE Coil and ignition

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 Post subject: Re: Best way to check if your speedo is out
Posted: Tue Feb 05, 2013 9:59 am 
Getting Side Ways
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Drive behind someone who has an accurate speedo, and get them to give you a wave when they are doing 100km/h, that's how I do it.

Gab
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 Post subject: Re: Best way to check if your speedo is out
Posted: Tue Feb 05, 2013 10:04 am 
Getting Side Ways
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Yeah I think I will try a few of those options it should atleast give me a ball park idea.
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 Post subject: Re: Best way to check if your speedo is out
Posted: Tue Feb 05, 2013 10:38 am 
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Put the cluster in diagnostic mode (see tech docos)and use the digital reading to calibrate - then adjust the analogue needle to suit.

 

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 Post subject: Re: Best way to check if your speedo is out
Posted: Tue Feb 05, 2013 3:52 pm 
Getting Side Ways
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Snaps method will make it more accurate than the standard needle to because they usually read up to 5km lower from factory.

Another option is find an 'odometer check length' on a freeway, I've seen a few around. If the odo is right the speedo should be to.

 

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 Post subject: Re: Best way to check if your speedo is out
Posted: Tue Feb 05, 2013 5:36 pm 
Getting Side Ways
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Age: 34

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Ride: Turbo VT, VL Calais Trubo, HQ SS

Location: Melbourne
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Thanks guys. I will have a play with it and see how i go!
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 Post subject: Re: Best way to check if your speedo is out
Posted: Tue Feb 05, 2013 8:02 pm 
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Do you own a smart phone of any description?

There are tons of free GPS speedo aps out there.

 

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 Post subject: Re: Best way to check if your speedo is out
Posted: Tue Feb 05, 2013 9:17 pm 
Getting Side Ways
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Age: 34

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Ride: Turbo VT, VL Calais Trubo, HQ SS

Location: Melbourne
VIC, Australia

Yeah i got one of those things. I will have a play and see what I can find
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 Post subject: Re: Best way to check if your speedo is out
Posted: Fri Feb 08, 2013 11:33 pm 
Getting Side Ways
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low_ryda wrote:
Snaps method will make it more accurate than the standard needle to because they usually read up to 5km lower from factory.

Another option is find an 'odometer check length' on a freeway, I've seen a few around. If the odo is right the speedo should be to.



That doesn't always work.

Since fitting the XR diff and wheels to my BA the speedo is out by %8 but the odometer is spot on. (if you can believe odometer checks on the freeways.)

 

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 Post subject: Re: Best way to check if your speedo is out
Posted: Sat Feb 09, 2013 11:56 am 
Getting Side Ways
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Go and hop on a dyno, $90 and you'll have your answer and you can get them to run it up at any speeds you want because the variation is never linear, so run it up at the common speeds, 40, 60, 80, 100, 110 and you'll know where you stand in any zone, and you get a power run to :D

 

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