[TR] HVDA 5-speed in TR6--speedo gear

Reihing, Randall S. Randall.Reihing at utoledo.edu
Fri Feb 3 08:27:32 MST 2017


I took advantage of this service once with a local officer in our small village, who was parked on a straight section of highway.

First, I got his permission to approach and then I asked him if he would share his readout with me if I passed by at a steady speed. He actually said he would, and so I did. I figured this was a great opportunity to see what they saw and compare that to what I was seeing. My speedometer in my mint 2004 Toyota Tacoma was, thankfully, reading 2 mph high.

True story.

Randall Reihing
1960 TR3A
________________________________
From: Geo Hahn [ahwahneetr at gmail.com]
Sent: Friday, February 03, 2017 10:20 AM
To: Reihing, Randall S.
Cc: Triumphs
Subject: Re: [TR] HVDA 5-speed in TR6--speedo gear

Where I live the law enforcement officers have a service where they will verify your actual speed.  They will even take a picture of you in your car.

Pricey though - runs a couple of hundred dollars depending on circumstances.

BTW - 1/100 mile is 52' 9.6".  That was the distance I used and the rebuilder got the odo correct but was unable to adjust the speed to be right at anything other than 60 mph.

Geo


On Fri, Feb 3, 2017 at 7:30 AM, Reihing, Randall S. <Randall.Reihing at utoledo.edu<mailto:Randall.Reihing at utoledo.edu>> wrote:
I know this is not the best method but it worked and no mechanical labor was involved. I used a 12 channel Garmin GPS and found a straight, level, section of highway approximately 6 miles long. With all 12 satellites accessed I used a red Sharpie and made a small mark next to the speedometer number I was testing accuracy for. I backed that up by being followed by a friend with a new Toyota Tundra which has an accurate speedometer. It was too much fun and now I know with a reasonably acceptable degree of precision what my true speed is.

Randall Reihing
1960 TR3A
________________________________
From: Triumphs [triumphs-bounces at autox.team.net<mailto:triumphs-bounces at autox.team.net>] on behalf of Rye Livingston [ryel at mac.com<mailto:ryel at mac.com>]
Sent: Thursday, February 02, 2017 9:30 PM
To: Tim Gaines
Cc: Triumphs
Subject: Re: [TR] HVDA 5-speed in TR6--speedo gear

Oh yeah, that's right, 1/100th of a mile, or 52 feet, 9.8 inches.





On Feb 02, 2017, at 03:13 PM, Tim Gaines <mtgaines at presby.edu<mailto:mtgaines at presby.edu>> wrote:

Thanks Rye. I was pretty sure that the speed and odometer readings were from the same gearing. The measures you described for recalibrating the speedometer are pretty much exactly what Herman van den Akker recommends in the manual for his conversion kit except that the distance he prescribed for the push was 1/100 mile. I'm starting to think I will be doing that measure too, but I think I will try an online Toyota forum along with the Triumph Experience forum and this list I've already contacted. Maybe something will turn up in a few days.

My aversion to messing around behind the dash comes from some scraped fingers, a couple of dash lights that failed to work after my last excursion there, and a really big mistake. A couple of years ago my temperature gauge started reading very high. I did everything I could think of to avoid buying a new radiator: different thermostats, thorough flushing of the engine water channels, check of the water pump, etc. Finally, having exhausted all other fixes, I bought a new radiator. After installation . . . . . . temperature readings were still high! After an appeal to this list, someone suggested that maybe I had a loose ground connection behind the dash. Sure enough, the ground wire that serves the instruments was loose where it fit on the speedometer mount. After tightening, normal temp readings. Sheesh.

Tim

----- Original Message -----
From: "Rye Livingston" <ryel at mac.com<mailto:ryel at mac.com>>
To: "Tim Gaines" <mtgaines at presby.edu<mailto:mtgaines at presby.edu>>
Cc: "Geo Hahn" <ahwahneetr at gmail.com<mailto:ahwahneetr at gmail.com>>, "Triumphs" <triumphs at autox.team.net<mailto:triumphs at autox.team.net>>
Sent: Thursday, February 2, 2017 5:23:21 PM
Subject: Re: [TR] HVDA 5-speed in TR6--speedo gear

Your odometer would be off as it's all run by the same gear in the speedometer.

I understand you don't want to get behind the dash and take out the gauge. For my TR3 I was having Palo Alto Speedometer rebuild mine along with the tach. I'm running Panasport wheels with 205/60 15, which is smaller than stock, so I had them calibrate my speedometer. Per their instructions I marked out x number of feet, I think it was 90 feet and a few inches, down in the street. I then attached a paper clip to the end of the speedometer cable and pushed the car the distance and counted the number of revolutions. I did it 3-4 times. They took that number and put in the proper gear in the speedometer and now it matches my GPS when I'm zooming down the freeway.

Good luck,
Rye
PH: 530-FIND-RYE

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