I know you can use a regular piston type -- but I had seen some old threads on one of the forums about people building their own with a datalog and few other parts. Never found the How-To though.

Just curious if anyone has made one and how it worked out.

 

Two folks here in Texas who I know have built their own:

- TwistedRotors - RX7Club.com - View Profile: TwistedRotors
- Rx7_Nut13B - RX7Club.com - View Profile: Rx7_Nut13B

Other threads:
- FDjunkie - https://www.rx7club.com/3rd-generati...%24200-182951/

Others, non-OEM:
Rotary Diagnostics - Rotary-engine Compression Tester System

 

I got one from Rotary Diagnostics, works great.

 

https://www.rx7club.com/3rd-generati...ester-1021454/