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Bryan,

What are your temps in cruise?

What is your climb technique?

My 320 would overheat if I climbed out at Vx or Vy. My takeoff fuel consumption is 15 gph. I climb at 135 KIAS, 2600 rpm, WOT and lean in the climb to about the same EGT indication as seen during full power ops (about 1310F) with over 1000 fpm up to abut 5000. On a very hot day, oil may reach 190F and the hottest cyl may touch 400F. If things seem too hot, I will go to 145 KIAS. Cruise temps at 25 squared are 180F or less for oil and 340-370 CHTs running ROP and lower if running LOP.

Scott Krueger

IO320

In a message dated 7/17/2010 1:40:57 P.M. Central Daylight Time, vonjet@gmail.com writes:

Exit area is standard 360 cowling exit. Can see why it would behave any different than any other lancair out there. Its actually a pretty good size opening.

On Fri, Jul 16, 2010 at 8:21 PM, <marv@lancair.net> wrote:

Posted for Bryan Wullner <vonjet@gmail.com>:

Anybody have any ideas or advice for the following situation:

Lancair 360 with carbed 360 (180hp) engine. 475 hours on it about. Chrome
Cylinders. I have a Plenum cooling system and larger cowling inlets.
(Zavatson's cowling and plenum system)
Oil cooler is mounted at the front inlet.
Oil wont cool in climb and will go up to 230 and probably higher if not
stabilized. CHT's are all hot in climbs and will go to 440 no problem. Cant
figure it out.
Motor runs great, compression good, boroscoped fine, mag timing good. All
leaks in plenum or baffling are sealed.
Probes were checked out ok.

Only thing I haven't checked is the vernotherm.

Thanks for any advice.
Bryan

[How big are your cooling air outlets and where are they located? Sounds like you're getting the cooling air in but not letting it out. Just a thought. <Marv> ]

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