Hi Guys,
I am breaking in a new old stock TD 049. I think I am finally there. I ran about 1 1/2 qt of fuel through the engine. I kind of want to tune it up now and see how hot I can get it to run. Here are the specifics:

Tee Dee .049
Two head shims
25% nitro
Back plate pressure fitting
3 oz bladder tank
fine thread NV (128 tpi?)
6x3 prop

I am getting 18K right now and that seems to be as hot as it will run, but I can't really get any adjustment on the NV which makes me think something is wrong. The NV was so far out it was practically falling out. Yet when I pinch the line I hear no change in RPM and if I hold it longer it will drop or quit. Here are some questions:

How much RPM should I expect from this set up?
What is the base NV setting with the fine thread?

I think I am going to break down the test bench and inspect it closely. I noticed the venturi loose, so I had tightened it, but I wonder what else might be wrong. Much thanks in advance!
Kind regards,
Rick