Hey Guys, Need some ideas on how to fix a problem. I am flying a VW 2180
with an 1821 carb and a KR intake sytem from Great Plains Aircraft. My
compression ratio is 6.9 to 1 with standard cylinder heads. My problem is
that at cruise my EGTs run 1500 to 1800 degrees on all cylinders while the
CHTs are normal at 350 to 375 degrees. My EGT Gauge is a WESTACH with the
probe sensors installed 6 inches from the exhaust port on the heads. I can
enrichen the fuel mixture until the engine starts to missfire and then lean
just a little and the EGTs still run up there in the 1500 to 1800 degree
range. I finaly burned an exhaust valve. My CHT gauge is also a WESTACH
system. I seem to remember someone else had a similiar problem a while
back.
Also has anyone used an intake system other than the Standard KR intake used
by most builders? It seems to me that there is to much tubing in the
multiple pipe system of the KR type intake for low RPMs used in aircraft
causing the fuel to condense and create poor automization or vaporization
all the way to the combustion chamber. Would not a single pipe have more
velocity at the low RPMs. A beach buggy turning 5 to 8 thousand benifits
from multiple intake pipes but I am not so sure about the 3 to 35 hundred
range. I would like to hear everyones thoughts.
THANKS, STAN KR2-M
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