I was told that I had a Verde transaxle in the car (the transaxle was
changed-out by a previous owner at approximately 90K miles. The
invoice for that work says "Milano Verde" on it), but I now doubt
that. I doubt it for two main reasons. First of all, My car seems to
have a stock GTV-6 speedometer sending unit, and I've been told that
the GTV-6 Speedometer sender won't fit the Verde transaxle case.
Secondly, the Verde has limited-slip differential, but when I have had
my car on a lift and spun one of the rear wheels, it acts like a non-
LSD rear end. So, my feeling is that if, indeed, my car has a rear-end
out of a Milano, it's a Platinum model, not a Verde and unless the
mechanic who did the work reworked the mount for the Speedo sender,
it's not a Milano transaxle at all.
George Graves
'86 GTV-6 3.0 'S'
On Nov 11, 2009, at 8:31 AM, Brian Shorey wrote:
Correct. Also, IIRC, you have a Verde transaxle in your GTV6,
right? Which speedo amplifier are you using? Which speedo? The
Verde transaxle will introduce some error if you're using the stock
GTV6 amplifier and speedometer (but it should make the car go faster
than you actually think it's going).
bs
From: George Graves <[email protected]>
To: Will Owen <[email protected]>
Cc: "<[email protected]>" <[email protected]>
Sent: Wed, November 11, 2009 2:52:23 AM
Subject: Re: [alfa] Re: Speedo check
Can't speak to your situation, Will, but in my case I think that the
lower profile than stock tire (for any given wheel size, the lower
the profile, the smaller the diameter of the tire) is making my car
go slower per wheel revolution than would a larger diameter tire.
Therefore when the high-gear revs of the rear tires are of some
certain number, the speedometer "thinks" that the car is traveling a
certain speed. Each revolution equals a certain number of linear
feet traveled which equals the tire's circumference. A smaller tire
has a smaller circumference, therefore fewer feet are traveled with
each revolution. This will mean that it will take more revs per mile
to cover the same distance as a larger profile tire, this equates to
a lower speed than that indicated. Increasing the tire profile from
a 50 to a 55 or a 60 ( Pirelli P6 15 X 60s are apparently what the
car came with) should raise the actual speed so with the proper
(that is to say stock) diameter tire, an indicated 80 mph should
equal 80 mph (or at least be closer to 80). Of course, the car will
suffer a bit on acceleration because the ratio between tire and road
will be greater.
George Graves
'86 GTV-6 3.0 'S'
On Nov 10, 2009, at 9:44 PM, Will Owen wrote:
> George Graves wrote:
>> The GPS SHOULD be much more accurate than any other kind of
speedometer. After all, if it can pinpoint where you are within a
few yards, it should be able to figure out how fast you're going
within a very small margin of error.
>>
>> George Graves
>> '86 GTV-6 3.0 'S'
> You'd think. My point was that my GPS is telling me that my MPH/
thousand is basically what your factory figures were telling you, as
opposed to what your GPS is telling you. So: is you GPS out of
whack? Or is *MY* GPS out of whack? Or has your car somehow been
endowed with some kind of mud-wrestling final drive?
>
> FWIW, I've been driving the 164S over the last few days and its
gearing seems to be about the same. Have not hooked the GPS into it
because its cig lighter socket spits the GPS plug out every few
miles, which is a major recurring pain in the ass.
>
> Will
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