good evening,

i tried to measure the turns of my speedo cable today ready to replace it with an electronic sender.

I jacked the back of the car up and put it into neutral. Turning the wheels one rotation resulted in prop turning 3.62 times (which is my diff ratio) and the cable turning exactly once.

this seems highly unlikely to me, the speedo cable rotates once for every one wheel rotation and I just happen to have the right diff to make this happen?

am i missing something obvious?

sounds a happy coincidence to me. isn't the 3.62 diff like the middle one out the sierra range?
maybe its like that to make calibrating sierra speedos easier?

I'm want to know the answer to this one (you a fair bit ahead of me)

all I know is that there are at least 3 different drive gears with 24 , 23 or 22 teeth (I assume thats how for calibrate for the range of diffs)

Hi

Sorry to steal the thread but where do you get the electric sender from.

Thanks

Bob

quote:

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Originally posted by bbwales
Hi

Sorry to steal the thread but where do you get the electric sender from.

Thanks

Bob

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okay... happy coincidence it is then, just wait a couple of month for the "my F*@$ng speedo wont work" post

here are the bits you need:

http://shop.ebay.co.uk/i.html?_nkw=type+9+electronic&_sacat=0&_trksid=p3286.m270.l1313&_odkw=type+9+sender&_osacat=0

Hi,

Thanks guys for the information, can I ask another question though? will this device drive my KOSO speedo?

Thanks

Bob

speedo gearing from fnal drive on a lot of cars is about 4:1.

yes i believe so.

My smiths speedo requires two pieces of information, pulses from the sender per rotation of the wheel and the distance covered by the wheel in one rotation.

Check your manual as this is probably the same with the KOSO.

quote:

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Originally posted by bbwales
Hi,

Thanks guys for the information, can I ask another question though? will this device drive my KOSO speedo?

Thanks

Bob

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