I have a new (old/unused) IO360-A3B6 that I’m trying to install (RV7) using a Vetterman exhaust that has the egt ports already drilled in different locations. Cylinder #1 is 1 1/2” from the flange, #3 is 1 3/4”, #2 is 2 1/8” and #4 is 1 1/2”, have called Vans they referred me to Vetterman who’s mailbox is full,and Lycoming said 2 to 4 inches from the flange. No idea if the previous drilled the holes or if they came predrilled. Hopefully I am only going to have to plug weld two holes but probably will be four. This has been a fun project !
TIA, Kirk S.
TIA, Kirk S.