which is more accurate? scanguage or speedometer

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Jun 24, 2010

Tys 4x4 FTW

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From: Las Vegas, Nevada

which is more accurate? scanguage or speedometer

my scanguage reads 2 mph lower then the speedometer on the truck. and it is calibrated correctly. which do i trust?

Jun 24, 2010

01_ranger_4x4

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From: Muskegon, Michigan

hmm, im not sure. 2MPH off isnt really that much, your speedo was probably off that much from the factory. if you have a GPS id check them with that.

Jun 24, 2010

04blackedge

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From: Durham, NC

I'd GPS verify and then go from there

Jun 24, 2010

Redneckstone

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From: usa

Get a GPS like a Garmin. set the cruise at 70 on the garmin. then adjust the speedo on the scangauge to match the Garmin with the +- settings

Jun 24, 2010

01RangerEdge

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From: Jackson, MO

If you have an iphone, there is an app that uses the accelerometer to measure speed.

Jun 24, 2010

FULLSCALE

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From: Clinton, Ontario

Quote:

Originally Posted by Redneckstone

Get a GPS like a Garmin. set the cruise at 70 on the garmin. then adjust the speedo on the scangauge to match the Garmin with the +- settings

That's the way I did mine. Rechecked it a while later and it's still good.

Jun 24, 2010

ES894x4

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From: Killafornia

speedo's come from the factory a little slow so i would never trust that as a source of your "true" speed

Jun 24, 2010

Jp7

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From: N/A

Speedo is purposely slow to prevent liability issues on the oems part. scangauge is correct.

Jun 24, 2010

brianjwilson

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From: Hillsboro, Oregon

I set the factory speedometer to be accurate according to gps, using my programmer.

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