I think the diesel one hooks up different or the pod is somehow different.
I went from a 185/75/14 to a 215/75/15, just by guessing/eyeballing I'm
about 5 faster than Speedo shows. I would like to keep up on my mpg while
tuning my fuel/boost for happy oomph, temp and fuel economy without over
taxing my Power Plant. My phone doesn't have good enough signal to use its
gps

Velma 82 1.9L AAZ TD Westy
On Jul 30, 2014 7:33 AM, "mark drillock" <mdrillock@cox.net> wrote:

> The "W" factor has to do with the tachometer, not the speedo. The speedo
> and odometer are driven by a cable that does not know or care what
> engine the vehicle has or even that it has an engine.
>
> Mark
>
> Al Knoll wrote:
>
>> Other than the "W" gears that drive the odometer, what is different
>> about the "Diesel" speedometer?  The rotation of the input shaft is
>> magnetically coupled via eddy currents to the spring-biased device to
>> which the needle is attached.  The faster the shaft turns the more
>> torque produced to counteract the spring force.  The angular
>> displacement thus created is resolved by the scale on the face of the
>> speedo and the needle position to indicate speed.
>>
>> Or I could be wrong.
>>
>> Pensionerd.
>>
>>
>> On Mon, Jul 28, 2014 at 9:58 AM, mark drillock <mdrillock@cox.net
>> <mailto:mdrillock@cox.net>> wrote:
>>
>>     The GW diesel verbiage is BS. The 2wd speedo they are selling will
>> work
>>     fine with a diesel. How they will treat your return of a diesel speedo
>>     as a core may be an issue though, assuming they even know how to tell.
>>     They don't have much use for vans before 86 and make various errors of
>>     fact when describing parts fitment for older vans.
>>
>>     Mark
>>
>>