I put an Audiovox cruise control that looks like the one at the link you
provided in my TR6 and it only works up to about 45 mph. The problem is
that the unit is too weak to directly pull the throttle linkage. I made
a lever for it, but the cable linkage doesn't have the range to open the
throttle enough. A possible option is to put a much weaker throttle
return spring in place of the stock one, but I don't consider that safe.
Electrically connecting the Audiovox unit was very easy. If I recall
correctly, it just had power, a connection to the brake pedal, and a
connection to the coil to monitor the RPM. For the power and brake
pedal, I think I just a double bullet connectors for a quad bullet
connectors in the dash/pedal area. For the coil tach connection, I used
a piggy back spade connector. I put the controller in an existing hole
in the dash support under the radio. It is all removable without
damage. If I remember right, pressing the clutch causes the RPM to
change, disengaging the unit.
If anyone made this unit work, please reply to the list as I'm
interested. I'm more after speed control to avoid going too fast than
efficiency.
Brian
On 1/30/2019 12:28 PM, Roger Elliott wrote:
> Hi,
> We are planning some long excursions this year in the TR 250, so I
> would like to install a cruise control in the TR 250.
>
> There have been two basic options mentioned in various posts.
> 1) The Rostra unit which is more expensive and seems to require have
> more installation requirements (for example a sensor on the drive
> shaft to register speed.)
> http://www.rostra.com/universal-aftermarket-cruise-control-by-rostra.php
> 2) The recreation of the Audiovox cruise control, which requires a
> vacuum canister. Quite a bit cheaper than the Rostra.
> https://www.murphskits.com/product_info.php?cPath=25&products_id=422&osCsid=PYoe2OY2I0duN1IkGnMJ1
>
>
>
> I have seen articles for installing both, but on carbs with a cable
> linkage but none with the throttle linkage like the early TRs.
>
> Has anyone installed on or the other on a TR250, TR4, etc that has the
> rods, levers, bell crank arrangement? If so, how did you make the
> connection?
>
> Thanks,
> Roger Elliott
>
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