| |
Click on image for the lowdown. 
====
| | |
7 members (FAST55, TUTS 59, Wally / Montana, Wickedbass, Mike Burns, Gdads51, Donf),
85
guests, and
4
robots. | | Key: Admin,
Global Mod,
Mod | | | Forums66 Topics128,065 Posts1,055,870 Members48,428 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Apr 2011 Posts: 106 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2011 Posts: 106 | I'm installing a VDO tachometer, a baisc one without an hour meter. I've got it all wired up, but there is something in the instructions about manually fine tuning it:
"Before your VDO Tachometer will function properly with your engine, you will need to configure it as shown in Diagram C (see below). the table at the top shows how to set the DIP switches for use with an ignition coil; the table at the bottom shows how to set the DIP switches when using the tachometer with an alternator. Note that manual fine tuning can be done using the potentiometer on the rear of the instrument. (See Diagram A). NOTE: This procedure should be done by an experienced mechanic ONLY, using a hand held reference tachometer. Fine calibration can be made between 30% and 100% using this fixed reference."
Can anyone explain what this means, and how it is done? Or is it even necessary? I don't care if it's slightly inaccurate. I won't be racing my truck or anything.
Thanks!
1940 Chevy 1/2 ton, 12 volt, 350/350th
| | |
|
|
| |
