speedometer calibration

[Young Ed]

8 hours ago, dale said:

Well for any do it yourselfer old Plymouth rodders….Took the Plymouth out this morning and going thru the speed alert  in town the speedometer was right on at 30 mph... 7 tooth red drive gear and a yellow 24 tooth driven gear......350 chevy antomatic with a 3.71 rearend and 670-15 coker narrow radial tires. 

 

I'd be interested to see how you did in a clocked off mile-around here those speed alert things always seem to read 3-5MPH off of my daily drivers.

[dale]

I go thru this one almost every day with my town and country or Tahoe and they both read right on at 30 mph...  Close enough for government work ...

[martybose]

It took a while, but I found the GPS system that drives a mechanical speedometer.  It probably isn't cheap (no price listed), but it certainly solves this problem.  It's called the SPEEDBOX, it's sold by Speedhut on their website http://www.speedhut.com

 

Marty

[Merle Coggins]

The price listed on that web site is $345.00

[DJ194950]

Other ratio adapters are avail- a few for your pleasure or terrorize your wallet!  ??

 

DJ

 

 

ECD-100 Electronic Signal to Mechanical Cable Drive Adaptor.htm

Amazon.com PATC speedometer ratio adapter 17.6% decrease Automotive.html

Ratio Adapters.html

[52 work truck]

On 11/2/2018 at 7:49 AM, dale said:

I don't see a beer on the table Robert  !!!    

 

Im keeping the original look with the old gauges..

Classic instruments in Boyne City MI can convert your stock speedometer to GPS