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#1220620 - 06/27/07 06:06 AM crown vic certified calibration adjustment
UpAllNight Offline
Member

Registered: 11/08/06
Posts: 135
Loc: Tampa
Has anyone fooled with this adjustment (located on the rear of the speedo). If so, what was the tuning range? Can it been tuned in as much as a 3 MPH difference?

93 Crown Vic, By the way... but it prob dont matter.
_________________________


93 Vic... 98 NPI block & 05 PI heads, cams, & intake. COPS ignition, J-modded 1996 P-71 trans, mark 8 convertor. Aluminum drive shaft. 3.08 gearing. Electric fan. SCT tune. P-71 dual exhaust. Traction control turned off while retaining the ABS (ask how if you want).

96 Towncar... Stock and mint.

85 Riviera (sold)... 6.6L 403 Olds, 214/224 cam, performer intake, 850 cfm Q-jet, elect fans on 4 core rad, 2-1/2" duals with spintech mufflers, 3.36 final drive, 2400 stall, modified 325-4L trans.

06 Kawasaki ZX-10R

06 Yamaha YZ250

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#1220667 - 06/27/07 09:18 AM Re: crown vic certified calibration adjustment [Re: UpAllNight]
lprocter Offline
Climber

Registered: 10/14/06
Posts: 533
Loc: Ontario, Canada
Why would you want to adjust it?
_________________________
Nothing's as bad as it seems... sometimes it's worse.

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#1220722 - 06/27/07 11:22 AM Re: crown vic certified calibration adjustment [Re: UpAllNight]
UpAllNight Offline
Member

Registered: 11/08/06
Posts: 135
Loc: Tampa
Swapped out a 140 MPH speedo that went bad for another 140 MPH speedo and now my cars speedo is off by 3 MPH at 80 MPH. These are adjustable at the rear, but the question is how much are they adjustable?
_________________________


93 Vic... 98 NPI block & 05 PI heads, cams, & intake. COPS ignition, J-modded 1996 P-71 trans, mark 8 convertor. Aluminum drive shaft. 3.08 gearing. Electric fan. SCT tune. P-71 dual exhaust. Traction control turned off while retaining the ABS (ask how if you want).

96 Towncar... Stock and mint.

85 Riviera (sold)... 6.6L 403 Olds, 214/224 cam, performer intake, 850 cfm Q-jet, elect fans on 4 core rad, 2-1/2" duals with spintech mufflers, 3.36 final drive, 2400 stall, modified 325-4L trans.

06 Kawasaki ZX-10R

06 Yamaha YZ250

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#1220793 - 06/27/07 01:08 PM Re: crown vic certified calibration adjustment [Re: UpAllNight]
Quickvic30 Offline
Just watchin
Grand Poobah

Registered: 02/24/05
Posts: 10908
Loc: Minneapolis, MN
Mine is also off by 3MPH, on the Daily driver.
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#1220805 - 06/27/07 01:25 PM Re: crown vic certified calibration adjustment [Re: Quickvic30]
UpAllNight Offline
Member

Registered: 11/08/06
Posts: 135
Loc: Tampa
Well I went ahead and tried adjusting the speedo using the calibration adjustment screw on the back of the speedo. It worked! I was able to roll back 3 MPH with ease. I;m not sure of how far I could have tuned it in but I have a feeling it will allow me to tune well over a 5 MPH difference.

Details on my car... I have stock 3.08 gearing (for now), 96 P71 trans and drive shaft, and 245/45/17 tires... For the smaller tires outter diamater I installed the orange speedo gear and that had my speedo right on. That is, it was right on untill I had to replace my speedometer, then it was 3 MPH fast at 80 MPH. I could have just went to the purple speedo gear to fix the problem but I wanted to do it the right way.

Only the speedo's that have "Certified Calibration" writen on the front of them can be calibrated. If you remove the speedo from the cluster and look at the back side, on the little chip you will see a very small flat head screw sticking out of a very small varible resister. This flat head screw will be glued in, locking in its setting from the factory. I used a razer to cut away as much of the glue as possible, being careful not to rip the resister off the board. Then I used needle nose plyers to turn the screw (since it was a little too hard to turn with a flat head that small). It took 1 full turn to reach a 3 MPH change.

SWEET



Edited by UpAllNight (06/27/07 04:31 PM)
_________________________


93 Vic... 98 NPI block & 05 PI heads, cams, & intake. COPS ignition, J-modded 1996 P-71 trans, mark 8 convertor. Aluminum drive shaft. 3.08 gearing. Electric fan. SCT tune. P-71 dual exhaust. Traction control turned off while retaining the ABS (ask how if you want).

96 Towncar... Stock and mint.

85 Riviera (sold)... 6.6L 403 Olds, 214/224 cam, performer intake, 850 cfm Q-jet, elect fans on 4 core rad, 2-1/2" duals with spintech mufflers, 3.36 final drive, 2400 stall, modified 325-4L trans.

06 Kawasaki ZX-10R

06 Yamaha YZ250

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#1220880 - 06/27/07 03:07 PM Re: crown vic certified calibration adjustment [Re: UpAllNight]
Quickvic30 Offline
Just watchin
Grand Poobah

Registered: 02/24/05
Posts: 10908
Loc: Minneapolis, MN
Good info man, thanks!
_________________________



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#1221077 - 06/27/07 07:32 PM Re: crown vic certified calibration adjustment [Re: Quickvic30]
AWE_Alex Offline
Poobah

Registered: 12/26/04
Posts: 5129
Loc: Leaving your mom's driveway
i always wondered how they adjusted them. how would i go about finding out if mine is calibrated right? any ideas or shop suggestions?
_________________________

2000 CVPI, GoRhino! 5038, glasspacks, 2012 Dodge Charge SE 17"s with Michelin Energy Plus tires
Lighting covered by FL 316.2397(3)
Originally Posted By: 124neta
Its because you haven't come to terms with the fact that you actually want to see that throbber.


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#1221100 - 06/27/07 07:51 PM Re: crown vic certified calibration adjustment [Re: AWE_Alex]
UpAllNight Offline
Member

Registered: 11/08/06
Posts: 135
Loc: Tampa
Here is how i check the calibration. I drive down the interstate with the cruise control set right at 60 MPH. I also have a stopwatch in my hand ready. The very moment a pass a mile marker on the interstate I start the stopwatch, then i stop it at the very next mile marker. If your speedo is correct it will take you exactly 60 seconds to go exactly 1 mile at 60 MPH. If it takes less or more than 60 seconds then you know your speedo is not right and you know which way to go.

Now... because roads do turn and interstate mile markers are a measurment of the very center of the road, it is best to clock your cars 60 mph 1 mile run at least 3 times and then average out the 3 times for the overall. Its also good to do this on a interstate outside the city because mile markers in the city are not always placed exactly right because of ramps and overpasses.

BTW... at 80 MPH you will travel a mile every 45 seconds.


Edited by UpAllNight (06/27/07 07:55 PM)
_________________________


93 Vic... 98 NPI block & 05 PI heads, cams, & intake. COPS ignition, J-modded 1996 P-71 trans, mark 8 convertor. Aluminum drive shaft. 3.08 gearing. Electric fan. SCT tune. P-71 dual exhaust. Traction control turned off while retaining the ABS (ask how if you want).

96 Towncar... Stock and mint.

85 Riviera (sold)... 6.6L 403 Olds, 214/224 cam, performer intake, 850 cfm Q-jet, elect fans on 4 core rad, 2-1/2" duals with spintech mufflers, 3.36 final drive, 2400 stall, modified 325-4L trans.

06 Kawasaki ZX-10R

06 Yamaha YZ250

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#1221238 - 06/27/07 11:01 PM Re: crown vic certified calibration adjustment [Re: UpAllNight]
dRock96Marquis Offline

Da Governator
Posting Addict

Registered: 02/21/05
Posts: 24349
Loc: Maryland
I didn't notice any adjustment screw on the back of my 98-02 CVPI speedo..

Maybe I wasn't paying attention, or it's a 92-94 thing.
_________________________
-Derek
-'03 MB SL55 AMG (toy) -'08 MB GLK350 (d/d) -'95 Mark VIII (under renovations) -'02 Navigator ("beater")
-Panther info & FAQs-


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#1221267 - 06/27/07 11:21 PM Re: crown vic certified calibration adjustment [Re: dRock96Marquis]
UpAllNight Offline
Member

Registered: 11/08/06
Posts: 135
Loc: Tampa
Not sure.. But if it claims certified calibrated then there has to be a way to calibrate it. The screw I have is very small and hiding on the side of a variable resister, it could very easily be overlooked.
_________________________


93 Vic... 98 NPI block & 05 PI heads, cams, & intake. COPS ignition, J-modded 1996 P-71 trans, mark 8 convertor. Aluminum drive shaft. 3.08 gearing. Electric fan. SCT tune. P-71 dual exhaust. Traction control turned off while retaining the ABS (ask how if you want).

96 Towncar... Stock and mint.

85 Riviera (sold)... 6.6L 403 Olds, 214/224 cam, performer intake, 850 cfm Q-jet, elect fans on 4 core rad, 2-1/2" duals with spintech mufflers, 3.36 final drive, 2400 stall, modified 325-4L trans.

06 Kawasaki ZX-10R

06 Yamaha YZ250

Top
#1221291 - 06/27/07 11:37 PM Re: crown vic certified calibration adjustment [Re: UpAllNight]
dRock96Marquis Offline

Da Governator
Posting Addict

Registered: 02/21/05
Posts: 24349
Loc: Maryland
I probably just missed it, something to take a peak at next time I have the cluster open!
_________________________
-Derek
-'03 MB SL55 AMG (toy) -'08 MB GLK350 (d/d) -'95 Mark VIII (under renovations) -'02 Navigator ("beater")
-Panther info & FAQs-


RIP 2vmodular

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