I've never operated the Dynamix, but I have three other TN's and they are really simple to adjust. Like most two needle carbs, you can only adjust the low speed needle after the high speed is set near peak. This seems to be more critical with my Webra TN's than with the average OS carbs.

I cleaned a bit more and scuffed up the sleeve with 320 wet/dry soaked with castor oil (you have to de-glaze them). As you know, Dykes rings typically don't create a great seal when hand flipping the engine. That's how they're designed. The seal is created on the downstroke as the combustion gases actually expand the ring against the sleeve. On the upstroke the ring imposes a lot less pressure against the sleeve creating less friction and drag. So, you don't feel the same kind of compression pop when hand flipping that you do with conventional rings and ABC engines. Still, there is a good pop with this engine.

Now, I have a question. What was the most commonly used header style for upright installations in classic designs? The fuselage top, 15° straight, or 90° straight? Maybe that's a stupid question since I really need to choose a plane first.[sm=bananahead.gif] I'm just impatient to run this thing.

David