Needle help

[Ben Ballard]

Ok, before iget to the problem keep in mind I am a newbie. Have a picco p.67, muck pipe set at 11 7/8", x460/2 prop on a Phil Thomas bud T5, on 50% nitro. When I get the needle set to make the engine come to the pipe it blows the plug. If I richen the needle it does not come to the pipe. I have tried pipe length from 10 1/4" to where I am at now 1/8" at a time. Stock picco carb... Any suggestions? Strut set at 1 1/8" to bottom with 1/8" angle. When it does come to the pipe it is about mid straightaway. Adjusting the needle in 1/8 turn incraments. Do I need more pipe length? Is that carb just that touchy on needle? Help its get'n exspensive!

 

[Samuel Hagan JR]

Try your pipe at 12 1/2" with the needle richened.

 

[Samuel Hagan JR]

Try propping down also.