10 Degs. Cooler Oil Temps.

[Guest JRMobile]

I have always had a problem with oil cooling and high oils temps. Over the years I have learned to live with it by doing a stagger climb if it was high ambient temps.

 

I decided to do something about it for this summer and purchased a kit from Jabiru and had it fitted by Sport Air in Lismore.

 

The test flight proved an eye opener with approx 10 deg. drop in oil temp and a reduction in CHT as a bonus. Its great when a plan comes together.

 

 

 

 

[Guest Andys@coffs]

Just out of interest, what was the cost, both from Jabiru and from the Lismore bunch. Is the engine the 4 or 6cyl motor. (pressuming 6 from the SP6 details about you)

 

What exactly was changed, is it per the last jabiru cooling advisory

 

Andy

 

 

[Guest JRMobile]

Andy

 

The cost of the kit was $851.40 plus install.

 

The kit contained the fiberglass cowl insert, new oil cooler, brackets and hose.

 

The decision to go ahead was based on discussions with the lame and I am unsure of "per the last jabiru cooling advisory"

 

and yes it is a six cyl.

 

 

[jetjr]

Ive just done the same on a 6Cyl, sure does help

 

how much was the cowl repair?

 

JR

 

 

[Guest JRMobile]

I cant quote accurate figures on the cost of the cowl fiber glassing as it was along the line of,

 

LAME needed a 3 phase power circuit run to a new lath machine and I am an electrical contractor, ;)

 

I needed new cooler installed and he is a very good fiberglass man.

 

Job done :thumb_up:

 

 

[Jabiru Phil]

JR Mobile

 

What are the new temp figures please?

 

Phil.

 

 

[Guest JRMobile]

Hi Phil

 

Went for another test fly this morning to check figures. Ambient temp was 27deg. with the inversion at about 3000ft with slightly higher temp, so a good test.

 

Oil temp in climbing cruise at 500 ft/min from 2000ft to 5000ft were fairly constant 93 / 95 degs. Dropping back to 80 degs in cruise.

 

CHT about 270/280 degs in climbing cruise back to 200 in cruise.

 

I cant be more accurate as I have the original steam gauges issued by Jabiru.

 

 

[Captain]

Hi PhilWent for another test fly this morning to check figures. Ambient temp was 27deg. with the inversion at about 3000ft with slightly higher temp, so a good test.

Oil temp in climbing cruise at 500 ft/min from 2000ft to 5000ft were fairly constant 93 / 95 degs. Dropping back to 80 degs in cruise.

 

CHT about 270/280 degs in climbing cruise back to 200 in cruise.

 

I cant be more accurate as I have the original steam gauges issued by Jabiru.

J

 

Looks like those mods gave you the oil temp result that we discussed at Cowra, so well done on that.

 

But your CHT's are confusing me. I just double checked the CHT stipulations in the manual for my 3300 and they say max continuous of 180 C, with max in climb of 200 C and with the time between the CHT between 180 C & 200 C is not to exceed 5 minutes.

 

If your temps are C they look hot and if they are F they look cool, and I've seen my No 2 hit 180 a couple of times on a long climb on a hot day.

 

As I am of the view (convinced even) that it is the high CHT's & EGT's that resulted from the Lean Burn kits, that have contributed to the valve issues, are you prepsred to advise further on your CHT's?

 

Best regards Geoff