I realised this weekend that the speedo in my car Overreads.
That's a first, I've had a few that read massively under, but not this time.
At an indicated 60 I am doing 65 according to say nav, and at an indicated 30, 32-33 according to say nav.
So it seems to consistently over read by about 10%
It's not a really big deal, but obviously it would be nice if it was accurate or a little under.
I do have 15" wheels when I presume 66 Belvedere II would have come with 14" wheel, so that's probably the difference?
The car has also had a 440 and 727 transplanted, with 8 3/4 rear end, different gearing again...
Again, not that worried, but is there anything I can do?
Speedo Overreads
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Yes, you can change the speedo drive in the transmission. Bolts in, can get messy so Jack the car up at a goodly angle to keep it a clean job. Easy to do.
http://www.drivinithome.com/mopar-speedo-gear-chart/
http://www.ebay.com/bhp/727-speedometer
http://www.drivinithome.com/mopar-speedo-gear-chart/
http://www.ebay.com/bhp/727-speedometer
Re: Speedo Overreads
sprintgtvgus wrote:...At an indicated 60 I am doing 65 according to sat nav, and at an indicated 30, 32-33 according to sat nav.
So it seems to consistently over read by about 10%.....
Surely that's under-reading then?
Either way, yes it should be an easy fix, tho earlier 60's gears can be tricky to source...
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Re: Speedo Overreads
Oops yes that was a bit dyslexic.RobTwin wrote:sprintgtvgus wrote:...At an indicated 60 I am doing 65 according to sat nav, and at an indicated 30, 32-33 according to sat nav.
So it seems to consistently over read by about 10%.....
Surely that's under-reading then?
Either way, yes it should be an easy fix, tho earlier 60's gears can be tricky to source...
Thank you for the info ref speedo drives etc.
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Speedometer error
I've got a problem the other way ! Going down M1 felt like I'm doing 65/70 speedo reads 40mph also at about 30 mph it's showing 15/20 mph very scary near cameras ! Help
Re: Speedometer error
As a short term fix I got a free app on my phone to tell me speed from GPS. Just wanted to check how far out my son's Mini speedo was.MoparRichard wrote:I've got a problem the other way ! Going down M1 felt like I'm doing 65/70 speedo reads 40mph also at about 30 mph it's showing 15/20 mph very scary near cameras ! Help
My Challenger speedo stopped working altogether, it sounded like a cat in a tumble drier so i just pulled the cable out, and rely on the phone and my own judgement.
Matt Hollingsworth - Vehicle Registrar
Panther Pink 73 Aussie Charger 265 Hemi 4 spd
Challenger Sam Posey Tribute car
Panther Pink 73 Aussie Charger 265 Hemi 4 spd
Challenger Sam Posey Tribute car