REFLECTOR:Cooling things down

[Scott Derrick]

Well I was testing out some modifications to my air diverter to see if I 
could bring the temps down on #2 & #1 cylinders yesterday.  I had also 
made some modifications to the cowling baffles.  Good news is I reduced 
the Cylinder temps across the board by about 10 degrees, bad news is the 
temp differential between the cylinders stayed the same.


We had our hottest day this summer season. Well above average, it was 90 
  at the airport when I took off and was almost 70 degrees at 10500.

Good day to test cooling problems!!

EGT Question!

Somebody had mentioned insuring the EGT's were in line and I had said 
they were. Well, it appears that wasn't the case.

At 50 LOP

#1 cylinder, EGT 1350 CHT 350
#2 cylinder, EGT 1360 CHT 365
#3 cylinder, EGT 1315 CHT 320
#4 cylinder, EGT 1300 CHT 305

Seems like a definite correlation between egt and cht, maybe a 
coincidence but I don't think so. So the first order of business is to 
get the EGT's in line.  I have an IO360.  Seems like changing the 
nozzles in #1 & #2 to richer(larger orifice) or changing #3 & #4 to 
leaner(smaller orifice) should do the trick.  My parts manual says the 
LW-18265 nozzles for a IO-360-CIC come in A, B and C sizes. You are 
supposed to have all A's or all B's etc. installed. The A's are the 
larger orifice, the C the smallest.  I'm not sure which are installed on 
my engine yet to determine which way I should go.

Anybody know where I can buy these in lots of 1 or two?  I would like to 
  avoid buying a whole set.

OIL COOLER QUESTION!

My oil temp at the highest power setting to maintain max RPM 2700-2730 
at 50 LOP would cause my oil temps to be in the range of 220-228 in 
cruise.  I don't like this at all. 210 is fine, and I see that all 
winter/spring, but above that I start to worry. I realize that getting 
the EGT's down for #1&#2 will probably lower the oil temps some. 
However I would like to consider how to install a secondary oil cooler. 
  Perma-Cool http://www.perma-cool.com/index.html seems to have some 
nicely made small size coolers. They also have a thermostat that 
bypass's the cooler until the temps get to 180 degrees, a must for a 
secondary cooler so it  doesn't interfere during the winter months.

Couple questions.

a.) What is the oil flow rate for a IO360 at 2700 RPM?  I can't find it 
in the engine manual.
b.) Where have people put their secondary coolers?
c.) Anybody using a fan/cooler combo like Perma-Cool sells?


Scott