Paul wrote:

I flew the SQ2000 today. The engine is running great, now that I have a

seperate water temp sender for the ECU and another for the engine monitor.
The outside air temp was 80 degrees, and I am very

disappointed with my coolant temps. The water temp hit 205 during the

climb.  Temps slowly came back down to 190 once I was in level flight, and
dropped to 170 on short final. Very

disappointing. (oil temps were fine).  I am going to seal all the gaps

around the radiator first, and see if that helps.  I am concerned that the
new ram air scoop I made to bring in cool air to the

throttlebody might be pressurizing the rear of the cowling, and

inhibiting the induction of air through the radiator. I will try sealing
around the radiator first. If that fails to bring the temps

down, I will try removing the ram air scoop and installing a NACA scoop

with a hose to bring air directly to the throttlebody, and not dump it into
the low pressure area of the cowling.  If that

fails, I think I will take up fishing or golf.
     Paul Conner, 13b powered SQ2000 in Mobile, AL

hi Paul,   hang in there, ive tried both, but i am not realy alive till i

lift those wheels off the ground. nothing can replace that airplane, take
care walt.

Sealing is all important. It was the main subject of my forum at Sun & fun this year.

Paul Lamar

Aubrey Thompson wrote:

Paul (Conner),
Do not despair!  You are very close to having it correct.  Since you said the oil temp. was OK, and you are feeding the cooling air to oil and water from the same plenum, try this quick experiment:
Put a piece of duct tape on the bottom side of the oil cooler blocking about 20% of its area.  This may increase the air flow through the H2O radiator enough to  give you the correct balance.  I
doubt that your induction ram air intake would create much overall pressure in the cowl...too many leaks.

Do we have a picture of your cowl showing the shape?  I couldn't find one.

Aubrey Thompson-- 

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