The new exhaust cooler, as its name suggests, makes the exhaust pressure cooler in order to prevent the fuel and fuel tank getting hot and losing its shape. The fuel is cooler and so allow better performance. Its biggest advantage is that the fuel consumption will drop. The exhaust cooler has a very nice finish with its orange anodizing and great engraving and is delivered with nylon holder, durite holder, silicon tube dust protections,¡K. The exhaust cooler is very reliable and efficient at a very reasonable price.

Features:
Anodized pressure line cooler to cool down hot fumes from the exhaust pipe into the tank. This cooler is placed between the tank and tuned pipe. It cools exhaust fumes which pressurize the tank, thus avoiding warm fuel. This will achieve a greater consistancy, easier tuning, and low sensitivity in refuelling. The use of cooler fuel (which is denser) is also very effective in obtaining the best output of the engine.


How to test:
We attached tube pipe to the gas cooler at both end, also applied on the temperature sensor. Use Eagletree recorder to record the differences in temperature. As to make sure the accuracy of measurement by using the thermally good conductive copper pipe to do the measure. Wrap with sponge to prevent loosing of heat or influence from the outer. These can record down the process and temperature, then download the record to the computer for inspection.
From the record we can see the exhaust pipe after the pressure, the highest temperature is 105.50'F means 40.83'C (This result out of my surprise is not too high at all) If we looked at the average will be 100.17'F that is 37.87'C. PS 29'C at testing moment. After the cooler the temperature becomes to 92.20'F means 33.44'C. And the average is 88.85'F equals to 33.44'C.
The finally results is the highest temperature decrease is 7.39'C. Average is 6.29'C.
But will the temperature different really influence engine performance or not?

In the air:
In first few flying, I don't feel too much different until when I take out the Exhaust Gas Cooler. But I don't believe the 7'c different won't influence any performance. So I change the way of testing. I fly the heli alternating with exhaust gas cooler and not. And I have also extended the flight time from six minutes to nine
Minutes.

I would first three minutes of gentle operation of the helicopter, followed by a continuous intense 3D flying until the end.
Then I found the engine performance of a discrepancy arose after long flight. When I pulled up speed quickly than 0 pitch falls back and tail way Morning ground fall down, the engine rpm from high speed back to low speed become longer, and engine speed will increase when the flight time close to the end. These phenomena do not occur in fly with gas cooler and the carburetor temperature will be relatively low.
Now, we got the answer. In the long flight, the fuel tank's temperature increases, causing the engine speed increased. The Exhaust Gas Cooler can keep the temperature of fuel tank stable especially after lone flight.