yarddart said:
RV8 io360 in climb 98 deg temp saw 230 oil temp. My pa18 has a 2inch lip bottom of cowl dropped oil temp 8deg .Just wondering.
Try the Lip and let us know how it works.
This is oil temp's OK and it was a hot day. To be realistic 98 deg is HOT and 230 oil temp acceptable (below red line), but higher than desired.
Great, a lip may help in climb as I said, may be you should get some foam and tape it on and test it? You did not mention what airspeed, but of course there always is the time honored method of lowering the nose.
However, if you really want it lower I would attack the oil cooler and or installation first. You can expect up to 30 degree drop if you are NOT using a Stewart Warner oil cooler. A SW cooler is more efficient. Not sure is you have a 180 or 200 HP.
IF you have 180HP IO360, SW part # 8406R (see web site link below)
IF you have 200HP IO360, SW Part # 10611R (see link to thread below, you may get away with a 8406R)
If you have a firewall mounted cooler using the Van's oil cooler kit, than that is a problem. The kit works OK for a 150/160HP 320, but not so well for 360's, an IO360 (200HP) forget it. The Van kit has a small 3" duct and a poor transition to the cooler (a very flat square metal pan).
Here is a builder's post with the ultimate cooler set up. Notice the size of the duct (4") and the tapered duct attachments at each end.
http://www.rvproject.com/20040519.html (8406R)
http://www.vansairforce.com/community/showthread.php?t=9223 (10611R)
http://www.vansairforce.com/community/showthread.php?t=9146 another thread
Good Luck, but if you have a 200HP and getting 230F OT in an aggressive climb at 98F day you are doing OK. There may be room for improvement.