Re: [DML] "1980's Delorean Speedo Cable Fix"

["Tom" <dmctom@xxxxxxxxx>]

Nick, that is a very neat idea. When it comes to speed GPS is very accurate 
by design - 0.05km/h or about 0.03mph.
I see only two problems with using GPS aside from price, which I can't find. 
I guess you need to log in to see it.
1. When you hop in and start driving there might be a delay before your 
speedo starts working. GPS receivers get their fix quickly when "hot" 
starting (a few seconds). "Warm" start takes a bit longer (15-30 seconds). 
Cold start might take a few minutes for an accurate fix.
2. It would be kind of strange to see your speedometer die every time you 
drive into a tunnel. It might also be problematic in dense cities with tall 
buildings.

In my opinion a unit like this would be a great addition to a normal 
speedometer where a regular speed sensor provides the speed signal and a GPS 
is used to correct it/calibrate it. I don't think it's a good stand alone 
solution to the problem.
Just my opinion.

Greetings from Poland!
Tom Niemczewski
Vin 6149 plus 2418, 3633, 5030, 16473, 17086
Google earth: 52°25'17.66"N, 21° 1'58.40"E

--------------------------------------------------
From: "Nick Kemp" <nkemp@xxxxxxxx>
Sent: Tuesday, May 14, 2013 2:29 PM
To: <dmcnews@xxxxxxxxxxxxxxx>
Subject: Re: [DML] "1980's Delorean Speedo Cable Fix"

> Check out the Sky Drive at:
> http://www.classicinstruments.com/index.aspx?documentID=skydrive
>
> It is a GPS receiver for the sole purpose of driving electronic
> speedometers.  Rather than install a VSS somewhere on the D, use the Sky
> Drive to generate the rotation pulses.  The ultimate in removing the
> angle drive.
>
> Nick
>
> Tom wrote , ----On 5/14/2013 4:57 AM ---------------------------:
>> Jan,
>>
>> Well, it is easy when you don't go into the details of the process and 
>> just
>> take the speedo to a repair shop. If you opt to do it yourself then 
>> you're
>> right, it's not easy.
>> First thing to check is the odometer. This is a mechanically linked 
>> system
>> (gears) and it should be correct. If the only thing changed was the angle
>> drive and the odometer is off the angle drive has wrong ratio gears. You
>> will need to replace it.
>> If the odometer is correct and the speedometer is off then you need to
>> determine if is it of by a certain amount or percentage, ie. does it 
>> always
>> read 10mph off (higher or lower) or if it is 10% off, ie. at 30 it will 
>> read
>> 33 and at 60 it's 66. If it's always the same number you can simply 
>> remove
>> the needle and reinstall it in a correct position BUT, be warned, this is 
>> a
>> very rare occurrence and is usually caused by a previous mechanic 
>> attempting
>> a repair. When it's off by certain % ten you will need to recalibrate it.
>>
>> I do have a plan to get rid of the angle drive as this is absolutely the
>> worst part of the entire car. In my opinion an electronic (optical) 
>> sensor
>> is the way to go here. I want to keep the original speedo and so I will 
>> be
>> driving the original head with an electric motor.
>>
>> Greetings from Poland!
>> Tom Niemczewski
>> Vin 6149 plus 2418, 3633, 5030, 16473, 17086
>> Google earth: 52°25'17.66"N, 21° 1'58.40"E
>>
>>
>> --------------------------------------------------
>> From: "Jan R. Eisen" <drenthe1954@xxxxxxxxx>
>> Sent: Friday, May 10, 2013 5:16 PM
>> To: <dmcnews@xxxxxxxxxxxxxxx>
>> Subject: Re: [DML] "1980's Delorean Speedo Cable Fix"
>>
>> > Tom et al,
>> >
>> > That's not so easy! There are two (actually three) ways to correct a
>> > speedometer that is "off" (Mine is off by 15% too)
>> >
>> > The first method is to change the spring that holds the needle back. 
>> > But
>> > since there is no information about the spring used, this is a very 
>> > time
>> > consuming trial-and-error method. It also requires to take apart the
>> > speedo over and over again. But if you have the time and money, it can 
>> > be
>> > done.
>> > The second method is to degauss the magnet and magnetize it again. Not 
>> > a
>> > very easy process either.
>> >
>> > Based on the hesitation of the various speedo shops that I approached, 
>> > I
>> > decided that I could live with the speedo as it is (I actually have a 
>> > rare
>> > original metric speedometer) and use my GPS if I really want to know 
>> > how
>> > fast I am going.
>> > Unfortunately, my odometer probably shows more than the actual mileage 
>> > (or
>> > should that be kilometrage) too. But then again, here in the USA hardly
>> > anybody has a clue about the relation miles/kilometer anyways.
>> >
>> > The last and third method would be to change the ratio in the angle 
>> > drive.
>> > I don't know if that has ever been done, but this almost sounds like
>> > something to research further. Tom?
>> >
>> > Jan
>> > Plymouth, MI
>> >
>> > On May 10, 2013, at 05:03 , "Tom" <dmctom@xxxxxxxxx> wrote:
>> >
>> >> John,
>> >>
>> >> If you have correct size tires then the only fix possible is to remove
>> >> the
>> >> speedometer and take it to a speedo repair shop. They will calibrate 
>> >> it
>> >> for
>> >> you.
>> >>
>> >> Greetings from Poland!
>> >> Tom Niemczewski
>> >> Vin 6149 plus 2418, 3633, 5030, 16473, 17086
>> >> Google earth: 52°25'17.66"N, 21° 1'58.40"E
>> >>
>> >> --------------------------------------------------
>> >> From: "John Podlewski" <john_podlewski@xxxxxxxxx>
>> >> Sent: Friday, May 10, 2013 7:31 AM
>> >> To: <dmcnews@xxxxxxxxxxxxxxx>
>> >> Subject: Re: [DML] "1980's Delorean Speedo Cable Fix"
>> >>
>> >> > Question
>> >> > What's the fix to calibrate it ?
>> >> > I'm off by 10 MPH at 60MPH
>> >> >
>> >> > Sent from my iPhone
>> >> >
>> >> > On May 9, 2013, at 6:08 PM, deloreanernst@xxxxxxx wrote:
>> >> >
>> >> >>
>> >> >>
>> >> >> There's an item on eBay titled "1980's Delorean Speedo Cable Fix"
>> >> >> which
>> >> >> is not accurate. The item for sale is the "dust shield" item 
>> >> >> l05104,
>> >> >> which is indeed part of the speedometer assembly. The problem is,
>> >> >> replacing it will almost never fix a non-functioning speedo. As I
>> >> >> explained to the seller, this speedo drive cap is typically the 
>> >> >> victim
>> >> >> of
>> >> >> a bound cable or seized angle drive, not the cause of a problem. 
>> >> >> When
>> >> >> the
>> >> >> lower cable can't turn, and the cap turns with the wheel, it grinds
>> >> >> the
>> >> >> middle of the cap out. A new cap won't fix a messed up angle drive 
>> >> >> any
>> >> >> more than a brand new light bulb will fix a tripped circuit 
>> >> >> breaker.
>> >> >> The
>> >> >> seller refused to correct the listing, claiming he has 3 DeLoreans 
>> >> >> and
>> >> >> has fixed all three of them this way. Uh huh. Even if that were 
>> >> >> true,
>> >> >> claiming the cap fixes the angle drive is flat out false. A word to
>> >> >> the
>> >> >> wise- eBay may be strangely fascinating, but get your parts from a
>> >> >> trusted supplier, not some unknown goof. By the way, he's offering 
>> >> >> it
>> >> >> for
>> >> >> sale at nearly twice the price you'd pay your trusted DeLorean 
>> >> >> parts
>> >> >> supplier.
>> >> >>
>> >> >> -Wayne
>> >> >> vin 11174
>> >> >>
>> >> >> [Non-text portions of this message have been removed]
>> >> >>
>> >> >>
>> >> >
>> >> >
>> >> > [Non-text portions of this message have been removed]
>> >> >
>> >> >
>> >> >
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