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Tom--give me a call--I had similar problems when I starte flying and I would be very happy to talk with you how I solved my problems. Cht 450+
egt 1450 + ,oil above red line. Now, all is great and I never see any temps even close to this. CHT 370 max, Egt 1300 or below, oil 210 or below on climb out.
Paul Hershorin
561 758-9174
--- On Sun, 10/7/12, N20087 <n20087@yahoo.com> wrote:
> From: N20087 <n20087@yahoo.com>
> Subject: [LML] Piston oil cooling jets
> To: lml@lancaironline.net
> Date: Sunday, October 7, 2012, 12:34 PM
> > Folks
>
> This is addressed to the hard core engine experts on the
> forum. I would love your feedback on this
>
> I am considering having my io360 crankcase modified so that
> I can install piston cooling jets which are standard in
> 200hp engines. The reason being, I have had to take
> aircraft out of service twice, once at 80 hrs and now at 160
> due to lousy break-in and high CHTs. I have done all the
> obvious stuff such as plenum, timing, plugs, flowed the fuel
> servo to the rich side, baffles etc.. I am running 9:1 eci
> cerminil cylinders and they will hit 430 on climb out.
> They went to 450 twice in the initial break-in. They will
> run 370 in 75% cruise and 340 lop
>
> All this aside, the pistons at 80 hrs (both times) were
> coated in dark varnish under the crown and the top of the
> crowns were heavily carbonized from oil blowback
>
> I am just getting tired of it and don't want to pul the
> engine apart again anytime soon after this downturn
>
> So,,,I am wondering if anybody has any experience or data
> concerning the cooling benefits of the piston oil
> nozzles. Ie is it 5 degrees or 20+
>
> Also, I am debating whether to split the crankcase myself or
> take the closed case (jugs and every accessory removed) with
> con rods still attached to the local shop and have them
> split the case, do the machining and reassemble. The
> shop is very very reputable but of course the cost will be
> higher if I get them to do the breakdown and reassembly
>
> As another cooling remediation measure I was thinking of
> opening up the cowl inlets to 4 inches but a little
> reluctant due to the increased drag and limited
> benefit. I added an electric cowl flap by the way and
> achieved only a 2 degree CHT improvement in climb at 130
> knots Go figure!
>
> Again, any feedback on my plan here would appreciated
>
> Thanks in advance
>
> Tom
>
>
>
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