View Single Post
fredmeister fredmeister is offline
Smart quod bastardus
fredmeister's Avatar
Join Date: Oct 2002
Location: Baltimore, MD, USA
Posts: 2,229
what is the voltage range that one should see at the terminal on a functioning tach as it idles thru to 6800rpm?
I assume the voltage changes from one value to another at both ends of the rpm spectrum in order to move the gage needle to show the various rpms?
For example at idle it is 4.5 volts and drops to 3 volts at 7000rpm.
Or does it function some other way?
1979 930 Turbo....3.4L, 7.5to1 comp, SC cams, B&B intercooler, Snow Perf water/meth injection, Rarlyl8 headers, Garret GTX turbo, 36mm ported intakes, Innovate Auxbox/LM-1, custom Manually Adjustable wastegate housing (0.8-1.1bar),--running 0.7bar max
---"When you're racing it's life! Anything else either before or after, is just waiting"
Old 08-24-2009, 09:27 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #57 (permalink)