Sender: <marv@lancaironline.net>
To:  lml@lancaironline.net
Date: Sun, 07 Oct 2012 18:15:44 -0400
Message-ID: <redirect-5797568@logan.com>
Received-SPF: none
 receiver=logan.com; client-ip=98.139.91.72; envelope-from=paulhershorin@bellsouth.net
DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws;
  s=s1024; d=bellsouth.net;
  h=X-YMail-OSG:Received:X-Mailer:Message-ID:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding;
  b=qKRrvMDgUS7ceBfCXUUc2tD/ebnsg3RXYghhAHpgA7IXQYimTbQAdQ6OIU5RNAUIaMq7nUb1/6emIYoTZFBRN5qaP8W45UlfpHm1DsVJtgwPLX7uia7Ehl+hBIg+yf3/bDjKFC8mwugFaS4DEzqKm15WQcNDTnyXGZ0tI0MzBTY=;
From: PAUL HERSHORIN <paulhershorin@bellsouth.net>
Subject: Re: [LML] Piston oil cooling jets
In-Reply-To: <list-5797399@logan.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable

Tom--give me a call--I had similar problems when I starte flying and I woul=
d 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 tem=
ps even close to this.   CHT 370  max,  Egt  1300 or below, oil 210 or belo=
w on climb out. =20
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
>=20
> This is addressed to the hard core engine experts on the
> forum.=A0 I would love your feedback on this=20
>=20
> I am considering having my io360 crankcase modified so that
> I can install piston cooling jets which are standard in
> 200hp engines.=A0 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.=A0
> They went to 450 twice in the initial break-in. They will
> run 370 in 75% cruise and 340 lop
>=20
> 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
>=20
> I am just getting tired of it and don't want to pul the
> engine apart again anytime soon after this downturn
>=20
> So,,,I am wondering if anybody has any experience or data
> concerning the cooling benefits of the piston oil
> nozzles.=A0 Ie is it 5 degrees or 20+
>=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.=A0 The
> shop is very very reputable but of course the cost will be
> higher if I get them to do the breakdown and reassembly=20
>=20
> 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.=A0 I added an electric cowl flap by the way and
> achieved only a 2 degree CHT improvement in climb at 130
> knots Go figure!
>=20
> Again, any feedback on my plan here would appreciated=20
>=20
> Thanks in advance=20
>=20
> Tom=20
>=20
>=20
>=20
> --
> For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.ht=
ml
>