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Date: Tue, 29 Dec 2009 17:33:10 -0500
Message-ID: <1ab24f410912291433u1b9b773cm21927c992ec60bd5@mail.gmail.com>
Subject: Solid corner seals
From: Lynn Hanover <lehanover@gmail.com>
To: flyrotary@lancaironline.net
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 Rhino,
I didn't know the Renesis had metal inserts - that's better than the rubber.
However earlier corner seals had no inserts, they were solid, apart from the
apex seal slot. I'm unsure if the older type used exclusively for high
performance rebuilds locally - because their more robust.
What has been passed on to me was, as the plug type get older they become
very brittle and break . I was given an older corner seal and was told to
squeeze it between thumb and finger , it broke easily. The solid types do
not break, to my knowledge. The insert type maybe springier and therefore
seal better, I assume.

I do have a renesis rotor for my single development, but haven't tried the
solid corner seals - if they fit I will be using them unless advised
otherwise.
Thanks for the heads-up on the seals.
George ( down under)

The rubber plugs in the later corner seals eventually become as hard as
Chinese arithemetic. They work better in new engines with the side seal end
gaps a bit tighter, and show up better on polution testing.

Those seals with the rubber plugs are not very strong, but I have found only
one broken in a tear down of a street engine. I broke one of them at Pocono
one weekend, and had to rebuild the engine on the trailer ramp. So, never
used them again. Just the early solid seals. Never broke one, or even wore
one out.

The Renesis exposes the side seals to the exhaust port, and that may require
a bit different thinking. They may need more end gap or the like. I would
look at the book before experimenting.

I have not ported a Renesis, but I have seen a Renensis iron up close, and
the port casting finish is dredfull. I would radius the port openings just a
bit, say .010" and wipe the radius with 400 wet or dry paper. The side seals
do not like sharp edges.

I suspect that the Siamesed center exhaust port would work better if it had
a double length header pipe like the old British Leyland engines. 4
cylinders and three exhaust ports????

Lynn E. Hanover

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<div><font size=3D"2" face=3D"Arial">=A0Rhino,</font></div>
<div><font size=3D"2" face=3D"Arial">I didn&#39;t know the Renesis had meta=
l inserts - that&#39;s better than the rubber. However earlier corner seals=
 had no inserts, they were solid, apart from the apex seal slot. I&#39;m un=
sure if the older type used exclusively for high performance rebuilds local=
ly - because their more robust.</font></div>

<div><font size=3D"2" face=3D"Arial">What has been passed on to me was, as =
the plug type get older they become very brittle and break</font>=A0<font s=
ize=3D"2" face=3D"Arial">. I was given an older corner seal and was told to=
 squeeze it between=A0thumb and=A0finger , it broke easily. The solid types=
 do not break, to my knowledge. The insert type maybe springier and therefo=
re seal better, I assume.</font></div>

<div><font size=3D"2" face=3D"Arial"></font>=A0</div>
<div><font size=3D"2" face=3D"Arial">I do have a renesis rotor for my singl=
e development, but haven&#39;t tried the solid corner seals - if they fit I=
 will be using them unless advised otherwise.</font></div>
<div><font size=3D"2" face=3D"Arial">Thanks for the heads-up on the seals.<=
/font></div>
<div><font size=3D"2" face=3D"Arial">George ( down under)</font></div>
<div>=A0</div>
<div>The rubber plugs in the later corner seals eventually become as hard a=
s Chinese arithemetic. They work better in new engines with the side seal e=
nd gaps a bit tighter, and show up better on polution testing.=A0</div>
<div>=A0</div>
<div>Those seals with the rubber plugs are not very strong, but I have foun=
d only one broken in a tear down of a street engine. I broke one of them at=
 Pocono one weekend, and had to rebuild the engine on the trailer ramp. So,=
 never used them again. Just the early solid seals. Never broke one, or eve=
n wore one out.=A0</div>

<div>=A0</div>
<div>The Renesis exposes the side seals to the exhaust port, and that may r=
equire a bit different thinking. They may need more end gap or the like. I =
would look at the book before experimenting.=A0</div>
<div>=A0</div>
<div>I have not ported a Renesis, but I have seen a Renensis iron up close,=
 and the port casting finish is dredfull. I would radius the port openings =
just a bit, say .010&quot; and wipe=A0the radius=A0with 400 wet or dry pape=
r. The side seals do not like sharp edges.=A0=A0</div>

<div>=A0</div>
<div>I suspect that the Siamesed center exhaust port would work better if i=
t had a double length header pipe like the old British Leyland engines. 4 c=
ylinders and three exhaust ports????</div>
<div>=A0</div>
<div>Lynn E. Hanover</div>

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