[TR] Adding a VSS pulse generator inline with speedometer cable

[Brad Kahler]

No, I don't.

Since the new cruise units are designed to work with modern cars I would
imagine whatever is typical for a modern VSS would be appropriate.

Just shows you how little I know about modern cars :)

If it was made after about 1973 I don't know much about them!

Brad


On Wed, Aug 15, 2012 at 10:02 AM, John Innis <jdinnis at gmail.com> wrote:

> You could also get (or build) a converter that will take ignition pulses
> and give you a VSS signal.  Do you know what the Specs are for the VSS that
> your unit wants?
>
>
> On Wed, Aug 15, 2012 at 8:59 AM, Brad Kahler <bkahler1 at gmail.com> wrote:
>
>> Geo,
>>
>> This one doesn't allow connecting to the ignition coil as a speed source
>> either.  It seems that all of them on the market now require a VSS signal,
>> pulse generator in the speedo cable or else magnets on the drive shaft.
>>
>> Also the one you've listed is a vacuum unit and I prefer the electric
>> servo
>> type.
>>
>> I installed an SCS/Frigette cruise control with electric servo unit on my
>> Spitfire back in 1998 and it worked great.  Bud Rolofson then installed
>> one
>> on his TR6 and it's been working great all these years.  Now that I want
>> to
>> install one in my TR4 they don't make the style that will sense speed from
>> the ignition coil.
>>
>> The two simplest options are a VSS in the speedometer cable or the magnets
>> on the drive shaft.  I haven't given up on the speedometer cable option
>> just yet, still a few more places to check with.  Barring that I'll
>> probably end up with the magnets on the drive shaft.
>>
>> Thanks,
>>
>> Brad