Re: Summer temperatures and cooling
Posted: Wed Jul 19, 2023 11:58 am
pfhoeycfi wrote:
In the final analysis what do you attribute your improvements to? Are the oem springs worth trying? Did you have to modify them? Curious can you replace the springs without draining the oil? I've had the oil drained each time I've pulled the springs and plungers.
Peter
Peter,
Hard to say for sure, but I suspect 75% springs and 25% airflow. For some reason I can't get my steady oil pressures below 60 psi. Someday when I have to overhaul it I'll investigate. So to compensate I stretched my original oil cooler bypass spring and that seemed to be the final thing that got me over the goal line. I think that for most installations those OEM springs should be good. Not sure why I had high oil pressures with the springs that came in my Aerovee kit. But if your pressures are good, then there is probably going to be no change.
It's an easy and cheap thing to try. You will lose a pint or so of oil, whatever is in the galleys above the plunger. And because of gravity that oil will go on your tools and hands. But overall it's not a bad job.
This morning I went out to fly a couple of loops and rolls. I climbed at 80kts straight to 6000', and topped out at 211F on the climb. Ambient was about 75F. For my acro flying I was in the low 200s and on the taxi back to the hangar my oil was 186. I feel like I won this one.