Charger12Custom 1 #1 Posted December 20, 2013 Hey all, just find an analog tach that supports 1-10 cylinders, I bought it for my truck but after rereading the description, I realized it could be used on a wheel horse! And at $60 its not a bad decision. It will be used on my truck but I will test it on my charger 12 as well. How do you hook the tach's signal wire on the point/condenser/starter-gen setup? http://www.glowshiftdirect.com/Tinted-7-Color-Tachometer-Gauge.aspx heres the link to the tach I bought Sent from my SAMSUNG-SGH-I747 using Tapatalk Share this post Link to post Share on other sites
JimD 3,347 #2 Posted December 21, 2013 You may have missed the installation instructions in your link. They like to place that stuff randomly in an ad so you have to hunt for them, and some don't post them at all. At any rate there is a link in the ad to those instructions that shows the connection to the negative post on the coil to pick up the pulse. It takes a few seconds for the diagram to load... http://www.glowshift.com/instructions/7-Color-Series/GS-710-Tachometer.pdf Share this post Link to post Share on other sites
cleat 7,177 #3 Posted December 21, 2013 Wow, these look neat !! Share this post Link to post Share on other sites
woodchuckfarmer 333 #4 Posted December 22, 2013 I can have an operating tack on my 520 now...cool.....Wayne Share this post Link to post Share on other sites
Save Old Iron 1,571 #5 Posted December 22, 2013 Please read the directions carefully as you may need a "tach adapter" for points based ignition systems. Most modern tachs are expecting to be fed a clean signal from an automotive style engine control computer, not the electrically noisy and high voltage spikes produced at the coil in a 40 year old ignition system. Share this post Link to post Share on other sites
JimD 3,347 #6 Posted December 22, 2013 Actually it said "tach filter" may be needed. At any rate, good eye Chuck! This is a copy from the pdf... Ta chometer Adapter: It may be necessary to install a Tachometer Adapter if you have a multiple coil system. You can purchase a Tachometer Adapter from local auto parts store. ï‚· Tachometer Filter : It may be necessary to use a Tachometer Filter if you vehicle ha s either a points style or HEI ignition system. You can purchase a Tachometer Filter from www.GlowShift. Maybe Chuck can shed more light on the differences between the two. When it comes to electronics I'm pretty much just stabbing in the dark. Share this post Link to post Share on other sites
Save Old Iron 1,571 #7 Posted December 22, 2013 (edited) the differences between the two. on a computerized ignition system, the signal fed to the tach is a very clean electrical pulse which varies from 0 volts to approx.12 volts (some engine computers may put out a 0 to 5 volt square pulse). on the negative terminal of an ignition based system, the signal to the tach contains an electrical spike which can exceed 300 volts. The tach filter probably filters out the 300 volt spikes by cutting it off at its electrical "knees" and results in a much lower level voltage being presented to the tach. Old school tachs will already have this simple filter inside the case as they are expecting a more "hostile" input signal . Newer tachs may require this filter to prevent damage to the tach circuitry. Edited December 22, 2013 by Save Old Iron 1 Share this post Link to post Share on other sites
HorseFixer 2,013 #8 Posted December 24, 2013 Will the digital Tach's work? It's a shame that they don't make a mechanical one going up to like 5K so the full range scale of the gauge can be utilized. Share this post Link to post Share on other sites
