One of my neighbors brought over an engine for testing.  It's Johnson CS.  It lacked an NVA and had a stripped pressure fitting.  I put in a OS 40 NVA and retapped the hole to 6-32.

It started right up on 15% with a 10/6 and did 10,000 RPM on suction.  No doubt it can do more on pressure with a smaller prop & more nitro.

If a vintage combat builder is interested, let us know.

One of my neighbors brought over an engine for testing.  It's Johnson CS.  It lacked an NVA and had a stripped pressure fitting.  I put in a OS 40 NVA and retapped the hole to 6-32.

It started right up on 15% with a 10/6 and did 10,000 RPM on suction.  No doubt it can do more on pressure with a smaller prop & more nitro.

If a vintage combat builder is interested, let us know.

Thanks for the help with my engine Paul.  It's good to hear it run! 
Steve Thornton

And I have sent you reply!