Don Ferrette Administrator Staff member Admin Moderator Supporting Member Vendor Joined Nov 25, 2003 Messages 16,194 Dec 20, 2017 #1 Helping out a buddy set up his CMB Beta21, what pipe lengths and what pipes are working well with that motor in a rigger?
Helping out a buddy set up his CMB Beta21, what pipe lengths and what pipes are working well with that motor in a rigger?
Mike Betke Well-Known Member Supporting Member Joined Aug 31, 2004 Messages 1,085 Dec 20, 2017 #2 The cmb 21 nitro pipe works good on mine at 8 to 8 1/4. I've had to run it a little on the long side as the summer heats up. The pipe is real close to the 3280, so you could run that at about the same length. I know other guys run the 3280 pipe with good luck.
The cmb 21 nitro pipe works good on mine at 8 to 8 1/4. I've had to run it a little on the long side as the summer heats up. The pipe is real close to the 3280, so you could run that at about the same length. I know other guys run the 3280 pipe with good luck.
Butch Londrigan Well-Known Member Supporting Member Joined Feb 21, 2012 Messages 1,143 Dec 20, 2017 #4 Scott Bouchie's pipe's work really good also.
T Tom David Well-Known Member Supporting Member Joined Jun 1, 2005 Messages 475 Dec 21, 2017 #5 Don, I have ran mine between 7 5/8 to 8 1/4. As always....depends on your load and how good the air is. 8 is a good place to start. Forgot to add, pipe I use is CMB nitro pipe. Last edited by a moderator: Dec 21, 2017
Don, I have ran mine between 7 5/8 to 8 1/4. As always....depends on your load and how good the air is. 8 is a good place to start. Forgot to add, pipe I use is CMB nitro pipe.
Don Ferrette Administrator Staff member Admin Moderator Supporting Member Vendor Joined Nov 25, 2003 Messages 16,194 Dec 21, 2017 #6 Thanks all, this gives us something to go on. Been a while since I've run a 21.....
LarryConrad Well-Known Member Joined Jan 20, 2007 Messages 2,773 Dec 22, 2017 #7 AB 21 fat pipe at 8” in my little SGX-ONE breaking in the engine. Weather turned unfavorable for boats in my neck of the woods before I got a chance to start leaning on the needle a bit and really dialing it in.
AB 21 fat pipe at 8” in my little SGX-ONE breaking in the engine. Weather turned unfavorable for boats in my neck of the woods before I got a chance to start leaning on the needle a bit and really dialing it in.
BobBonahoom Well-Known Member Joined Mar 6, 2009 Messages 532 Dec 22, 2017 #8 Was running a Bouchie pipe at 8" with my 21 Beta up north, but had to move to 8.25" last summer in Hunstville.
Was running a Bouchie pipe at 8" with my 21 Beta up north, but had to move to 8.25" last summer in Hunstville.