How many people on here have differential compression testers?
   I am trying to get some baseline numbers on rotary engines.
   http://www.skygeek.com/ats-2em.html

   They cost about $84 from this source.

   This is a rock solid way of finding out if your new after
   market apex seals are junk. If they leak more than stock Mazda
   seals you can be sure the people that made them do not know
   what they are doing.

   It is of course also a good way to gage the condition of your
   engine.

   When I get a chance I will do the engine in my RX8.

   Paul Lamar ...No rotor no motor.


I have one of these testers.

Almost all A&P/IA's (which I am not) will have one too.

I think that's about the going price.

http://www.chiefaircraft.com/airsec/Aircraft/Tools/CompressionTester.html


Matt-

Thanks Matt. Anybody authorized to do an annual on a certified aircraft engine
must have one... I think. I bought mine about 15 years ago to check the
O-470.