f28 speedo drive

[tony k]

i have just bought a f28box i think its the mechanical one how do i turn it into electrical speedo as there is no hole for me to put the sender in for my digi dash

heres a pick of my old box with the electric speedo in place
http://i207.photobucket.com/albums/bb221/tonysturbonova/DSCN0247.jpg

and heres my new one there isnt even a hole there to fit it
http://i207.photobucket.com/albums/bb221/tonysturbonova/DSCN0246.jpg

[Philsutton]

If it has no hole in then it is already an electric type one an thus you cant run a speedo drive off the box. Unlucky

[tony k]

where does it link up to then as got another f28 and it has the hole cut out for it thats what i run the other one off but this one aint the same

[Philsutton]

it links up to the diff as the reading is taken straight off that.

[tony k]

i know it might sound stupid but where abouts i know it normally goes next to the linkage bit but there is no hole for it so aint got a clue

[Philsutton]

it will be clear as its just a blanked hole, will be like a flat round area

[tony k]

cheers mate will have a look tomorrow take a pic aswell just in case

[tony k]

picks a the top of why im asking

[R1CH]

the top pic is a mechanical speedo drive box with the digi dash sender attatched, if you unscrew the digi dash sender then it will leave you with a std speedo cable attatchment.
The bottom pic is an electronic speedo drive box, it takes the speed reading from the ABS sensors (when its fitted in the Calibra), if you wanna use the box in the bottom pic then your gonna have to convert it to a mechanical speedo drive.
V-Tuning used to offer a service but doesn't look like they do anymore, this might give you a better idea of whats needed ?

http://www.v-tuning.com/F28%20Speedo%20Drive.htm

[tony k]

could i take the casing off mine and just swap them over as the new box has got a quaife diff in thats why im using this one now

[R1CH]

Don't see why not, you've also gotta fit a F20 speedo drive ring on the diff ??
Can't give you any more info than that as i never needed to do owt with mine.

Rich

[tony k]

cheers r1ch does anyone else know if thats hard to do or is there another way round it as want to run a digi dash

[bump]

IIRC the last time someone tried to put a speedo drive ring on it kept breaking. Then the swap was made to the same speedo setup Will F uses.

[tony k]

i was just thinking today(not to hard as might get a headache) could i run the speedo wires from my crank sensor as that works on pulses dont it as going to get my omex system soon

[Adam]

No, crank sensor is for engine rotation speed, which is not matched to road speed.

[tony k]

what else can i use to get the speedo work cant be bothered to rip the box apart?

[Adam]

A ring type sensor, that people use when fitting a LSD.
A pickup on the driveshaft iirc.

[tony k]

is it just cable tied to the driveshaft then where do you get these from then

[Adam]

http://www.pngclub.com/forum/showthread.php?t=84916&page=3

Something like Dan has done. But thats a aftermarket speed/sender.

[tony k]

cheers mate will have to get some new clocks then