Jeff, I do not understand what you mean by "oil pump needs to have a severe duty spring". Do you mean that you need a stiffer spring on the first bypass valve? That may help send more oil to the cooler.
I have the same situation you do with oil lines in close contact with exhaust lines. My lines are stainless braided with fire sleeve over them and the exhaust is wrapped and I have not seen any evidence of significant heat transfer between the two. Why not try adding an oil cooler inline with the oil filter (after it)? I would not expect removing the oil filter from the loop to have any positive effect on oil temps. For what is is worth, I tried making my openings and exits larger and all it did for me was slow the plane down. I was feeding the cooler with two 2" scat hoses installed a cowl flap that would allow a gigantic cooling exit. None of that did much for my oil temps either. Again, different plane but same engine and problem. Here is the link to our recent discourse with lots of info and input from guys that have had similar issues: http://www.sonerai.net/CMS/index.php?option=com_jfusion&Itemid=160&jfile=index.php&topic=1983.0 http://www.sonerai.net/CMS/index.php?option=com_jfusion&Itemid=160&jfile=index.php&topic=1987.0 Also, take a look at these oil system schematics found here. Great info! http://www.sonerai.net/gallery/thumbnails.php?album=199 Jeff Lange Sonerai N1463J - 2110cc VW On 9/23/10, Jeff York <jeffyor...@yahoo.com> wrote: > As a follow up on my high oil temps. > > Last Saturday, we taped close the RV6 style air intake opening on my KR2. > This > air intake was to feed fresh air to my Zenith carb. (My understanding is > that > carb is not capable of high velosity air via a enclosed tube ram air style > intake. So I do not believe I can seal that carb in a intake tube type > configuration.) ( thats another conversation) > > The purpose of this test was to test the possiblity that intake air was > disturbing the low pressure side of the engine. > > The limited flight results seemed to indicate that my oil temps came down > from > 230-240 to about 220. Still high but initially better. However, we now > belief > that we may have raised the CHT's > > We then added an additional lip to the lower cowl exits existing lip. This > lip > was made of alum and extended about 2.5 inches past the existing lip. > > > In the first test we bent the lip (about 30-35 degrees) up toward the lower > fuse effectively decreasing the exit opening of the lower cowl. This seemed > to > have no effect on oil temps. So we tried opening the lip about 30-35 > degrees. > Again, we could see no effect on oil temps. > > Now are thoughts are around the idea that my oil pump needs to have a severe > duty spring in it. I do not know if it currently has a severe duty spring, a > heavy duty spring or standard spring in the GPAS 2180 VW engine. Are > thoughts on > this are around the idea of oil pressure and your previous words to me > regarding > oil pressure. I also have a remote oil filter and understand from the GPAS > site > that I should have a severe duty spring when using a remote oil filter. > > I am also suspect of the routing of my remote oil filter supply lines as > they > come in close contact with my exhaust pipes. My pipes are ceramic coated by > Jet > Hot but I think there is still heat transfer going on and especially if my > oil > pressure is lower, the slow flow would allow greater heat transfer. I have > fire > sleeve on the lines but do not have true heat shields. > > So, I will re-route the remote oil supply lines. Add heat shielding to the > supply lines and the exhaust were they come in near contact. Then test fly > and > see the results. I am also considering by passing the remote oil filter and > seeing what happens. I am also going to do an oil change to insure I have > the > right viscosity. > > Your thoughts. > > Jeff York > KR-2 > Georgetown Airport for 2012 Gathering? > > > > > > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html >
