Tiny Tach makes a digital tach that uses induced voltage from a wire wrapped around a spark plug lead as it's pick up. I used one on a Slick mag on a VW with good results. I think you'll find a write up on Mark L's web pages about him using a Tiny Tach on his Corvair as well. He had some issues with it, but was eventually successful.
I see that Aircraft Spruce doesn't show that it's an induction pick up off the plug wire in their write up anymore, but it still is. Tiny Tach has a FAQ page at <http://www.tinytach.com/tinytach/fqa.php> $36.95 (US) for any of the units on the Tiny Tach web site, or order through Aircraft Spruce if delivery to SA is an issue for them. -Jeff Scott Los Alamos, NM ---------- Original Message ---------- From: "Willie van der Walt" <touri...@intekom.co.za> To: "'KRnet'" <kr...@mylist.net> Subject: KR> RPM Gauge List-Post: krnet@list.krnet.org Date: Wed, 13 May 2009 14:09:28 +0200 I used a VDO rev counter with the pickup on the deadcut point of one Slick Magneto. There are two on the Limbach. Since I removed the wire from the Magneto the engine is running much smoother. Now how can I measure the engine revs? There is no alternator on the motor. Any ideas? Please help. ____________________________________________________________ Best Weight Loss Program - Click Here! http://thirdpartyoffers.juno.com/TGL2141/fc/BLSrjpTFoYeaUe8jc9gL9njvkO58yLNZwhb6Fx6vp2fPKYXq17be5ejtOGM/
