Bryon,

I don't understand. I am cooled the same way that you are but it takes 15 minutes of taxying to get my oil temp up to 70°F. My gage does work because if I close my cooling air door (behind #3) the temp will go into the 200s in flight.

I am thinking that the cooler is really bad or the vernatherm has to be checked.

As far as head temps, I have no comment because you haven't mentions the explicate temperatures.

Lorn

> From: Bryan Wullner <vonjet@gmail.com>
> Date: January 29, 2011 11:36:33 PM EST
>
> My airplane: Lancair 360, 180hp 360 carburated. I have a plenum to cool and I am feeding the oil cooler with air off the #3 cyl.
>
> My chts are high on the ground and takeoff. The oil temp is high on the ground as well. Its to the point where I can't takeoff if I'm on the ground too long. And the hotter days aren't even here yet.
>
> Also my carb temp climbs on the ground and pegs at the gauge limit of 127 degrees. I've replaced the probe and the manufacturer seems to think its operating normally. This would make me believe my lower cowling area is getting hot and not enough air flowing out of it.
>
> My AP has checked my engine, compression, timing etc and doesn't believe there is any issues with it. The cooler is a 9 vane SW that was new when installed.
>
> My plan was to add cowling louvers to the lower cowling on each side below the cyl banks.  I would hope this would improve the air movement out the cowling.
> I read that cht probes could read high if they run close to the exhaust in a tight cowling. Mine do. Also the carb probe is kind of close to the exhaust as well. Not sure if this is my case. All my baffles are in place and properly sealed.
>
> Anybody have any advice on where to place these or other ideas that would improve cooling or things to check
>
> Bryan
--
Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst
DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us
LNC2, FB90/92, O-320-D1F, 1,750 hrs, N31161, Y47, SE Michigan