CMB 67HR Green head

[Tim_Duggan]

It's going in a glass turbine hull Mike. I think it's a Hydro & Marine hull.

This motor is new but not sure if it' from a new batch or an older one. Will have to CC the button to know for sure I think. I have a lathe and can adjust if needed...

 

[anthony_marquart]

On a muffled pipe isn't the actual stinger inside the muffler section of the pipe? Does reducing the stinger on this type of pipe actually do anything? On a nitro pipe i see the benefit. More back pressure and more heat in engine. I have a AB parabolic that has a little tiny hole down inside, then it flows to the muffler section,. If there any benefit to adding a long stinger or reducing the stinger on something like this.

 

[moparbarn]

what size AB pipe anthony? on some of the .21's, andy recommended opening up the actual stinger, down inside the muffler.