I ran-in and tuned a 12TR R-Spec yesterday in a new FT NTC3.

Used O'donnell 20% and temp's were around 60.

I found the OS recommendation for 2 turns out was just too rich, so I started break-in at aroung 1-1/2. Also raised the idle a little to prevent loading up off-throttle.

What a treat this engine is. It ran flawlessly during break-in, with only a couple of flame-outs during the first 5 tanks. I started leaning it and the engine really came alive. I did lose a P6 plug as I started to lean it out. In the end, the HSN needle ended up at about 1-1/8 turns out.

After finishing the HS tuning, I re-set the idle and the thing just runs great. I can sit idle for 30 seconds, pull the trigger and it takes-off like throwing a light switch.

I can't believe this was a $150.00 engine. I don't get why OS discontinued it so long before the TzR becomes available.