This post is only directed to those RV-12 builders that have installed the new style muffler assembly. The new style muffler assembly is easy to identify ? because the muffler?s exhaust pipe penetrates the cutout in the lower cowl vertically as opposed to at an angle swept aft.
Did you fellow builders with the new muffler assembly find it necessary to elongate the cutout in the lower cowling more to the right side of the fuselage to accommodate the exhaust pipe or shift the muffler towards the pilot?s side of center ? or a combination thereof?
Curious because my exhaust pipe extends beyond the edge of the scribe lines on the lower cowling cutout by at least 3/8? when the muffler assembly is centered under the engine. If the muffler is shifted way left towards the pilot?s side, the exhaust pipe can be centered in the cutout in the lower cowl ? but doing that places one of the springs for the #3 cylinder perilously close to the coolant hose.
Van?s said they have had no calls about this issue, but that does not mean anything if guys are just enlarging the cutout and/or skewing the muffler as needed and just moving on. I?m thinking the root of the problem is that the weldment exiting the muffler is a tad long prior to taking the 90 degree down bend.
If everyone has run into this, than perhaps Van?s can make the appropriate corrections for future builders based on the response to this post.
Happy building,
Did you fellow builders with the new muffler assembly find it necessary to elongate the cutout in the lower cowling more to the right side of the fuselage to accommodate the exhaust pipe or shift the muffler towards the pilot?s side of center ? or a combination thereof?
Curious because my exhaust pipe extends beyond the edge of the scribe lines on the lower cowling cutout by at least 3/8? when the muffler assembly is centered under the engine. If the muffler is shifted way left towards the pilot?s side, the exhaust pipe can be centered in the cutout in the lower cowl ? but doing that places one of the springs for the #3 cylinder perilously close to the coolant hose.
Van?s said they have had no calls about this issue, but that does not mean anything if guys are just enlarging the cutout and/or skewing the muffler as needed and just moving on. I?m thinking the root of the problem is that the weldment exiting the muffler is a tad long prior to taking the 90 degree down bend.
If everyone has run into this, than perhaps Van?s can make the appropriate corrections for future builders based on the response to this post.
Happy building,