I would appreciate some help sorting out some issues regarding installation
of a 3rd incooler for a pressurized an ES-P TSIO 550 As I understand, the
theory behind using the 3rd intercooler is to further cool the air as it
enters the mixing box . The latter feeds air into the cabin for
pressurization. The temperature  of the cabin.air is controlled by varying
the mix of  colder air from the outflow side of the 3rd intercooler with the
warm air from the hot (intake side) of the twin intercoolers channeled to to
mixing box. I have heard anectodal stories that the 3rd intercooler
1) interferes with effective cylinder cooling resulting in excessively high
cylinder head temperatures when running at 50 ROP.
2) not really reducing the temperature of the air coming in to pressurize
the cabin. (I realize the cabin needs to be airconditioned regardless of the
number of intercoolers)
3) the vanes are subject to rain damage and difficult to service

If that is the case, am I better off just utilizing air from the outflow of
the standard dual intercoolers?

Thanks
Joe Neustein
ES-P N36YZ reserve
engine installed
awaiting mixing box.
3rd intercooler?.
avionics panel

Joseph Neustein, MD
915-595-2700 office
915-276-8316 mobile