... Do not do annular 1050 4150.
Based on what opinion or experiences?
The guy that bought my PS1000 had an annular carb on his. Mine was over a 1/10 quicker. He wouldn't give it back after testing it. The annular is on my shelf here if your interested in it...it's a nice QF...
One data point from some guy with a car that went faster when changing carbs isn't very convincing argument. The annular boosters will pick up a lot of low end torque in a big carb. Your buddy might have lost torque by switching to your carb and since his chassis wasn't very good he ended up going faster.
