CMB .45 engine with AB Parabolic

[Overboard]

I am setting up an Aero Marine Sprint Cat (35 inches) with a CMB .45 purple head motor and an Andy brown Parabolic pipe (silver). Can some one tell me what length to run the pipe?

 

[nitro junky]

I am setting up an Aero Marine Sprint Cat (35 inches) with a CMB .45 purple head motor and an Andy brown Parabolic pipe (silver). Can some one tell me what length to run the pipe?

98957[/snapback]

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Id say start at 10" from center of cylinder to center of weld and move it in from there for best performance

 

[nigel]

We are a bit different down here in Aus. I think but I have the same boat, engine/pipe combo and I find 29cm (centre of engine to weld on pipe) a good length with 50%.

Cheers Nigel.