View Single Post
Old 03-26-2010, 03:45 PM   #2 (permalink)
Master EcoModder
Join Date: Feb 2008
Location: belgium
Posts: 663

vectra a - '95 Opel Vectra GLS
90 day: 37.51 mpg (US)
Thanks: 14
Thanked 61 Times in 44 Posts
race bicycle tachs use a magnet placed on a spoke and a sensor that detects every pass, perhaps a little magnet on the cam belt gear or whater else turns with the engine like the water pump perhaps, than again the alternator signal, could skip this step.

you might be able to find an electronic kit, that is able to do the math. these educational kits usually come with instructions so you just need to know how to solder basically

you might also be able to find an electronic tach kit, wich will be set up to be calibrated etc (unlike stock tachs with might require some hacking)

just some random thoughts...
aer·o·dy·nam·ics: the science of passing gass

*i can coast for miles and miles and miles*
  Reply With Quote