Don’t be. Doing a TR is different but not hard. The first thing is to unlearn all the nonsense being spread around. Mattax somewhere on here posted a link to NACA 49. Find that and read that paper. Larew wrote a great book. Taylor wrote a bunch on carb function in his books. The first thing to get your head around is fluid viscosity. Change the viscosity of any fluid and you change it’s behavior. Simple as that. One easy example is two stroke tuning. If you take 5 different premix oils, mix them at the same ratio and they will all have a different viscosity. That affects tuning a bunch. Now get an oil that mixes at say 80:1 and compare that to an older oil like one of the Pennzoil premix oils that mixes at 32:1 and compare the two. The pennzoil mix will require a bigger pilot, more main jet and a rich needle. Not only because at 32:1 there is significantly more oil in the jet relative to fuel then an oil mixed at 80:1, the pennzoil mix will be a higher viscosity because the oil is thick. So that translates right into any carb tuning. Changing an air bleed (among other things) will change the viscosity of the fluid. Change the viscosity of the fluid and you change how it behaves. Air speed is the other thing. One example is using annular boosters over a down leg. The AB will have a much higher signal so by that one characteristic will change how much and when you need emulsion. It’s relatively simple when you think it through.
