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--

Giffen A Marr wrote:

Paul
I would look at putting the hose to the throttle body first. If you are
dumping ram air behind the radiator, it is slowing down you flow through the
radiator. You have two different purposes here, one to put ram air pressure
to the throttle body and two to maintain a low pressure are aft of the
radiator. If you are dumping that high pressure air for the throttle body
into that area, you are defeating your purpose.
Giff Marr LIVP/20B 32%

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