Guys,

 

Things have been a little too quiet on the list lately, so I thought I would post a flight report on the Renesis water pump conversion I recently completed on my 20B. 

 

I recently converted my 20B to accept the Renesis water pump.  I did this after weighing the two and found that it would save 6-7 lbs.  While it was more work that I had estimated, it turned out well worth the effort.  After working through a persistent misfire issue over the past few weeks which was cured by careful attention to the CAS setup, I was finally able to take to the air last weekend.  OAT was 69-70* @ 2,500 msl and there was a 3000' ceiling, so I didn't go any higher.  

 

Things went very well, climbing out at 6700 rpm water got to 175*, oil to 185*.  Circling at a modest 25.5" MAP, water temps dropped to 143*, oil settled in at 160* (my oil temp target).  Adding power, I saw the oil temps starting to creap up a bit, bumping 165*.  Cowl flap was left open during the entire flight.  Needless to say, I am very pleased.  

 

It should be noted that in conjuction to the Renesis water pump, I added a Laminova oil/water exchanger.  It is connected to the coolant return line and in series with the oil/air exchanger.  I measured a 10* increase in coolant temp through the exchanger.  I haven't measured the oil temp drop yet.  However I estimate the oil temp drop through the exchanger to be 20-25*.  

 

Mark