ORIGINAL: Not24
I don't understand some of you guys. I thought I answered all of these questions a few days ago after the successful test flights with the Magnum carb. The bore thru the barrel is .388", which is equal to 9.86 mm. This diameter allows for good fuel draw and still makes all the power of the larger carb. The reason is because the fuel/air mixture is now
The other thing I said mine did with the st carb is this. It was hard to richen up. To get it rich enough to then be able to hold vertical, it would be too rich to fly, and would be spitting raw fuel out the muffler. With the smaller carb, I only need to back off 350 rpm from peak to be able to go vertical. The best part is that it only takes about 4 clicks on the needle to get that 350 rpm. On the st carb, it took about 2 turns.
I like the 10% powermaster and the way it runs. The high needle is open 1 3/4 turns for flying. With lower nitro, the needle would be closed a little more, and with higher, open a little more. I think the 10% is fine, but transition may be improved with 15%.
Your trying to shove numbers down their throats and that your way is the right way. Well its not. Look at where these guys are from. Richen it up, lean it out, 10%, this plug that plug, add 350 rpm, take 350 rpm2 turns here , 1/1/2 turn their. This may work in your area but is totally different in other parts of the country and world. This is not rocket science here. Two like items will more than likely not operate in the same manner- or even close and especially if you not even in the same area.
It reminds me of Tower Hobbies selling their combo with a cheap 40 la to some sucker in Denver. They should know better. Oh by the way, Ya I know, I don't exist to you any more![sm=spinnyeyes.gif]