[Bigsauce]

I ventured out and bought a digital hour/tachometer for my 105 with a k241. It's a Sierra hour/ tach meter that's made for engines with up to 2 cylinders but ran into some issues with measuring the rpm. From what I read all over the internet the proper setting is 1 pulse per 2 revolutions so I set it as such but I'm getting 2400 rpm as my idle speed and 3000 rpm for wot. The engine sounds like it's running at a higher rpm at wot and it would seem that the drop between wot and idle is greater than 400 rpm. Am I doing something wrong or is my tachometer just garbage? Or maybe my k241 isn't set properly? Anyone using a digital tachometer that can chime in?