I tried to send this to the Corvair list but I must have failed to make the transition to the new list. I will have to sort that out tomorrow. Until then, I am sending the body of my email to this list. Its KR related but Corviar specific.
I have gotten a few more flights in on the Corvair powered KR this week. For the past couple of weeks we have been working to get the oil temps down. Originally, there was a large plate type cooler installed on the top of the engine with no ducting to or from it. It basically sat in stagnant air. We built a baffle below it and routed it's outlet to the low pressure side of the cowl. That helped but its still running 220f in cruise. While I am not startled by that temp, It does make it difficult to control the oil pressure in various modes of flight. During today's flight with an OAT of 75f, I saw 29psi of oil pressure while the engine was turning 2950rpms and the temp was at 218f. While that pressure is adequate it will be lower on hotter days. I have a few questions. What is the max acceptable oil pressure for a Corvair engine? What is considered the max continuous oil temp (we are using the recommend Rotella oil)? I have built an oil pressure adjuster that allows me to vary the pressure on the control spring. It works as intended, but during takeoff with an oil temp around 150f, the pressure is about 55psi. After it heats up it drops to what I have mentioned above. In the VW world, 55psi is not an issue, but I need some input concerning the Covair engine. After getting the mixture distribution sorted out, this is the last lingering issue I am dealing with. Thoughts? Thanks in advance for any help! Jeff Lange Race 64 - Skye Racer Blog: http://schmleff.blogspot.com Youtube Channel: https://www.youtube.com/schmleff
