When I restored my 1st Morgan, (it was a +4, which should have had a TR
engine, but instead had a 2.0L Ford), there was a device installed on the on
the speedo cable between the trans and speedo with little watch like dials.
Apparently is was some sort of " transmission" that allowed one to slow or
speed up the cable between the trans and speedo, therefore allowing
incremental adjustment of the ratio, and allowing the proper adjustment of the
speedo to the proper rear end/tire & wheel size.
I assumed it was a Ford part, I think it's sitting in a box somewhere. Given
the number of people I know with "hot rod" 4x4's I assumed it was standard
equipment for guys when they wanted to fit oversize wheels and what not.
Anybody ever seen such a device?
Jonas Payne
PBR
Cell: (702) 358-5084
-----Original Message-----
From: healeys-bounces@autox.team.net [mailto:healeys-bounces@autox.team.net]
On Behalf Of Bob Spidell
Sent: Friday, November 12, 2010 4:09 PM
To: Len and/or Marge Hartnett
Cc: Healey Mail List
Subject: Re: [Healeys] Dealing with the Highway Patrol
The indicated speed was (more-or-less) exactly 11% low, which is what you'd
expect going from a 3.91 to a 3.54 rearend.
There's two parts to modifying a speedo for a different rearend: changing the
gearing on the tripmeter and odometer and changing the speed readout. The shop
did the former, but (apparently) forgot to do the latter. They fixed it
no-charge.
I checked the odometer against the roadside markers and it was spot-on, and
didn't notice the incorrect speed readout since I didn't have a GPS or other
means to calibrate. I've since found helpful websites that will give the
expected speed if you plug in gearing and RPMs.
bs
--------------------------------
Bob Spidell - San Jose, CA
Bob: You left us hanging! How did your GPS speed compare to the rebuilt
speedo? (I won't ask why you didn't know beforehand) ;-)
(The Other) Len
Vacaville, CA, USA
1967 AH 3000 MkIII, HBJ8L39031
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