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

[Nick Kemp <nkemp@xxxxxxxx>]

I "think" that this module manages both problems.  If I have the correct 
unit(if not this unit there is one out there that does work as follows):
- you can wire it so that it is always on  (in low power mode when the 
car is off) so that it is ready to go when you are.  No delay waiting to 
get the satellites.
- I think it also has a mode where it infers speed when the signal is 
lost.  This may be OK for short tunnels but not for long ones
Tom wrote , ----On 5/14/2013 8:07 AM ---------------------------:
> 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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> >> > [Non-text portions of this message have been removed]
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