lml@lancaironline.net Mailing List Archive

Check the air pressure in flight above the cylinders and compare it to the air pressure below the cylinders. You may find that you need to add a cowl flap. At least you can see how the air is moving thru the cowl in flight. That will go a long way to solving the problem.

Bill B

From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Bryan Wullner
Sent: Saturday, July 17, 2010 2:41 PM
To: lml@lancaironline.net
Subject: [LML] Re: My airplane is running HOT

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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