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Speedo Calibration
September 3, 2015
7:05 pm
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Ben Shepherd
Downham Market, Norfolk
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Evening All

I've tried calibrating my Flight speedo using the magic 13021 number, but the speedo is not working. If I turn the ignition on whilst pressing the button, the display reads SETPPU then 008380, even if I have inputted 013021. Is this correct?

The sensor is picking up the prop shaft bolt heads (yellow LED flashing) but I haven't done any further investigation yet as I am wondering if this is the problem.

Any help / advice gratefully accepted.

Many thanks

BB

Ford-based narrow body, read about the build here: http://gbszeroespana.blogspot.com.es/

September 3, 2015
7:47 pm
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RichardL
Maidstone, Kent, UK
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Hi Ben,
Sounds like the speedo is still in setup mode - set PPU - set pulses per unit
Did you get the 'done' message after inputing the number?

I cribbed the cai instructions included with the speedo here - I would start again work through the steps
http://richards-gbs-zero.blogs.....locks.html

+ the magic number will only work on certain combinations of diff/wheel-size etc... Simon can advise.

Zero GT: On the road Summer 2013. Experience: 1x Amateur build Zero. Build Diary: Richard's GBS Zero

September 3, 2015
9:42 pm
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Simon
GBS Technical
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when you have entered the number wait for all the numbers to start flashing, pressing the button at this point will prompt the reply "done" and the speedo head will be programed.

As I said on the phone this is a cover all number, which has never let me down for the Ford setup, and barley differs for the Mazda, however it is NOT a 100% accurate number, as Richard says there are some differences in diff ratios and tyre size, however as long as the reading is within 10% of actual and reading higher than actual it will pass IVA.

When you are out on the open road, LEGALLY, you can fine tune with a sat nav.

September 4, 2015
5:39 am
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Ben Shepherd
Downham Market, Norfolk
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Thanks both - I'll try again. Perhaps I was a little tired last night, hence this post appearing in the wrong section of the forum... ...sorry!

Regards

Ben

Ford-based narrow body, read about the build here: http://gbszeroespana.blogspot.com.es/

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