@AlanRail posted:John
if you give me some dimensions I can design and 3D print one that you don't need to do any reaming
unless you like doing that??
@gunrunnerjohn posted:Thanks, I got this one installed. In truth, the larger stack holes are very beneficial for smoke flow, I try to enlarge the stack output s on upgrades if I can, it really helps with the volume and appearance of the smoke flow.
The reason I chose that size was exactly what John mentioned. Also that OD of the funnel matches the hole size on the PCB of the DSMK units. A lot of new PCBs need to reamed up to size. So, I keep it consistent with the exhaust stack through the shell.
Every conversion I do that requires a custom made funnel I play with the smoke flow. Adding expansion chambers even making Venturi inside of the exhaust “tube”. I get great results. Such as my latest design for this 3rd Rail Allegheny. Dual stack loco, and it smokes like crazy better than any dual stack stock Lionel engine Ive seen or repaired…toot toot.
