Alright, I'm sure it's posted a million times and I'd be lying if I said I didn't try searching but it's late and I'm hoping someone could provide a link of some sort.

I have a friend with a compression tester (if that's what the actual machine is called) however it's not a specific rotary one. That's one of the only things I found is someone saying "specific rotary compression tester."

If someone could just post a link or even write a DIY that would be boss.
Sorry for the uber n00b question BTW

 

It's the same principle as testing a piston engine, except for the fact that you essentially have 3 combustion chambers (created by each rotor face) that are being tested at the same time. Without pressure venting off via a bleeder, only the highest compression value of the 3 will be displayed on the gauge. If the bleeder is held open, the needle on the gauge will bounce and show the pressure for each face momentarily. The minimum spec in the FSM is about 80 psi, but 100+ psi is ideal. You can search the tech sections for "compression test" too.

 

here is how i did it

1 run engine for at least 15 minutes to warm up
2 start removing the top two spark plugs before engine cools down
3 disconnect all spark plug cables and place safely away
4 remove egi fuse located on left side of engine bay by the shock tower
5 connect compression tester to front rotor
6 have an assistant crank the engine while pressing gas pedal all the way down this is like a kill switch for the fuel pump
7 hold down the release valve on the compressor to give you the 3 values and not the highest value
8 if possible record the results for reference and to review later (bounces are quick)
9 repeat for rear rotor the same

feel free to correct me if i'm wrong or missed something its been 4 months since i did it

 

ive took a short cellphone video of the guage face, and watch it over and over and over and over and over and over again, and you can usually see almost exactly where the needle bounces to.
also the bigger the guage the easier to read.