Warm Wx Numbers

[kitfox812]

I have a Kitfox ss-7 with over 900 hrs on it. I am getting a little nervous
about the temps.

Last evening the OAT was 83 at 3500ft and everything got a little warm.

My CHT's were 230 and 249.
My Coolant (evans) was 230
My EGT's were fine, 1380 or so

These number are below specs but they seem high.

How does this compare with some of the numbers other people are getting
on a 912uls?

[Dorsal]

I'm having a similar issue, just came back from a fly-in, 75 deg OAT, 5000 rpm with oil at 230, CHTs nearing 300. If I pushed it harder (or on climb out) things would have gone into the red.

[leptronjohn]

do you guys have oil coolers on these guys, where is the radiator mounted?
john

[Dorsal]

Yes and in front of the coolant radiator. In my case I am not sure the numbers are real so that will be the first thing I check. I did have a problem with erratic oil temp reading but that is not the case here.

[kitfox812]

Yes, for me to and I forgot to say that my oil temp was in the 230 range also.

I use the GR Digital EIS and I think it is pretty accurate.

I flew to Arlington last year at 6500 ft and I don't remember the temps being this high.

[Dorsal]

I am planning on closing the gap under the radiator at the back of the NACA scoop. Have others done this and did it make a difference?

[desertfox1]

Testing a new prop before Oshkosh trip today. Temps were
240 oil and 245 CHT at 5200. Took a little pitch out and flew
for an hour at 4000', 205 oil and 215 CHT. This is about avg
for this plane when it is this hot. Its Phoenix in July!

Phil

[kmach]

Hi,
from what I have learned , if you use evans waterless coolant your temps will be higher. about 25degrees .

Evans is not as efficient as 50/50 water/antifreeze for cooling when flying. Evans does have a higher boiling point so it helps prevent boil over on idle and taxi if the engine is running hot in those situations.

last summer on hot days 85 F my cht's would be 238-245F area with evans, I switched to 50/50 mix coolant when I changed my coolant system hoses now at 85F my chts are running 200- 225F area.

Hope this might help.

[Dorsal]

Definitely lower numbers than I am getting and for me it seems to be a recent change. I boiled my CHT sender last night (handy Jetboil camping gear) and it read 212 on the mark. Changed the oil, filled the coolant reservoir (was still half full) and flew some night quals, all was in the green. Will take it out again tonight and push some extended climbs to see what I get.