K+B .67/ Macs muffled tuned pipe length - whats a good starting point ?

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yamaha74

Well-Known Member
Joined
Oct 11, 2006
Messages
99
I have a "93 1/8 scale Miss T-Plus, that i'm going to start out with a #5100 K+B .67, and a Macs #1369 11cc muffled tune pipe. A better engine combo might be in the works for later in the year, but this is what's going to be run, for now. I'm just trying to get a baseline length to get all the pipe hardware set up, and do the final finetuning length when it's on the water. The current length is 11 3/4" from the center of the engine, to the largest part of the cone. Anybody have a similar combination that they've already cut the tuned pipe to length, and had some success ?
 
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about 12 to start and work your way in slowly. longer, more torque-bottom end. shorter, less bottom end and more high speed. also depends on boat weight and prop.
 
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