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Yes, Perry, there is a path from the exhaust ports
to the EGT ports you are referring to.
If you look closely at the exhaust port in the
rotor housing you will notice a small (approx 3/8-1/2" dia hole in the
insert/housing. (I am doing this from memory so bear with me). This
diverts some exhaust gas over to iron side housing (as best I can remember - I
think on the turbo blocks it diverts it to the center housing) and the holes
iniron housing takes it down into the intake manifold through the holes you have
showing as unblocked.
I blocked mine by using some Pottery clay and
filling in the area in the aluminum housing under the area of the
hole in the exhaust insert. The heat hardens the pottery clay and no EGT
gas. I learned this from one of the Rotary Racing crowd - but again can't
remember where. There are of course other ways to block it. I don't
know how much exhaust gas or heat you might get from the hole, but I would
definitedly block it off somehow rather than having exhaust gas under the
cowl.
----- Original Message -----
Sent: Saturday, October 04, 2003 11:46
PM
Subject: [FlyRotary] intake port
Hi All,
I fired up my engine today to check to see if my
header was sealing better using silicon as a gasket as per Lynn Hanover's
suggestion when I noticed there is exhaust gas coming from ports just below
the outboard intake ports (see photo). I had not plugged these when I
hacked up the original 6 port intake manifold assuming there was some type of
external EG valve that routed gas here in it original form. Is there
really an internal passage from the exhaust ports to these ports and what has
the rest of you done to block them off? I think
I'll put some 0.030 stainless sheet between the intake and the
block unless someone has a better idea.
Looks like I'll be making it down to Tracy's
fly-in (flying commercial :-( ) and I'm looking forward to putting
some faces to the names.
Thanks
Perry Casson Glastar/13B
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