--===============8953605769050514434==
boundary="=_966c6f09-1e66-49db-8115-11a189d3f5fb"
--=_966c6f09-1e66-49db-8115-11a189d3f5fb
Content-Transfer-Encoding: quoted-printable
If the catch can has a connection to a (low) spot of the crankcase, lots of=
oil can be pushed into the catch can at the track curves, especially when =
the duct between the crankcase and the can has only a small diameter, then =
the oil cannot return to the crankcase. It means there is some blow by, but=
maybe the symptoms are not necessarily bad news.=20
Marcel=20
Van: "fot" <fot@autox.team.net>=20
Aan: "fot" <fot@autox.team.net>=20
Verzonden: Woensdag 22 mei 2019 04:31:47=20
Onderwerp: [Fot] Oil Blow-by Cause?=20
I just had a great weekend at Summit Point, perfect weather, four days and =
lots of track time, some quick laps and good racing.=20
After my last session, I noticed some dripping oil as I put the car in the =
trailer.=20
Got it home to find a half full catch can (1 pint?), and evidence of oil bl=
owing out of the valve cover cap vent hole.=20
Tonight I ran a compression test and leakdown test. Cold engine results:=20
1 - 200 and 2%=20
2- 180 and 6%=20
3 - 180 and 9%=20
4 - 195 and 0%=20
5 - 190 and 0%=20
6 - 185 and 0%=20
Note - I suspect my longacre leakdown gauge may not be reading quite right,=
as when i have the air side set to 100, the leakdown % on the last three i=
s slightly below zero. So, perhaps the leakdown on the first three is highe=
r.=20
There was no excess oil until the last session. Oil pressure is about 50 ho=
t at idle and 65 - 75 at speed, depending on RPM.=20
EGT readings remained in the 1200 - 1250 range across three monitored cylin=
ders at top speed=20
What do i have - failing rings?=20
Any diagnosis or tests you recommend before I start pulling the thing apart=
would be appreciated.=20
Triumphs racing - I=E2=80=99m sure I=E2=80=99m missing a few but this is wh=
o I remember.=20
TR3 - John Hasty, Henry Frye, John Styduhar=20
GT6 - me, Paul King, Jason Sukey, Jay De Pol until his diff case broke=20
Spitfire - Russ Moore, Marty Sukey, Jeff Govert, Kent Bain, others=20
Tr4 - Mark Wheatley, Allen Goode, I=E2=80=99m missing at least another one=
=20
Scott Janzen=20
_______________________________________________=20
fot@autox.team.net=20
http://www.fot-racing.com=20
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot=20
arcel@telenet.be=20
--=_966c6f09-1e66-49db-8115-11a189d3f5fb
Content-Transfer-Encoding: quoted-printable
<html><body><div style=3D"font-family: Verdana, Arial, Helvetica, sans-seri=
f; font-size: 10pt; color: #000000"><div>If the catch can has a connection =
to a (low) spot of the crankcase, lots of oil can be pushed into the catch =
can at the track curves, especially when the duct between the crankcase and=
the can has only a small diameter, then the oil cannot return to the crank=
case. It means there is some blow by, but maybe the symptoms are not necess=
arily bad news.</div><div>Marcel</div><div><br></div><hr id=3D"zwchr"=
data-marker=3D"__DIVIDER__"><div data-marker=3D"__HEADERS__"><b>Van: </b>"=
fot" <fot@autox.team.net><br><b>Aan: </b>"fot" <fot@autox.team.net=
><br><b>Verzonden: </b>Woensdag 22 mei 2019 04:31:47<br><b>Onderwerp: </=
b>[Fot] Oil Blow-by Cause?<br></div><br><div data-marker=3D"__QUOTED_TEXT__=
">I just had a great weekend at Summit Point, perfect weather, four days an=
d lots of track time, some quick laps and good racing. <div class=3D"=
">After my last session, I noticed some dripping oil as I put the car in th=
e trailer.</div><div class=3D"">Got it home to find a half full catch can (=
1 pint?), and evidence of oil blowing out of the valve cover cap vent hole.=
</div><div class=3D"">Tonight I ran a compression test and leakdown test. &=
nbsp;Cold engine results:</div><div class=3D""><br class=3D""></div><div cl=
ass=3D"">1 - 200 and 2%</div><div class=3D"">2- 180 and 6%</div><div class=
=3D"">3 - 180 and 9%</div><div class=3D"">4 - 195 and 0%</div><div class=3D=
"">5 - 190 and 0%</div><div class=3D"">6 - 185 and 0%</div><div class=3D"">=
<br class=3D""></div><div class=3D"">Note - I suspect my longacre leakdown =
gauge may not be reading quite right, as when i have the air side set to 10=
0, the leakdown % on the last three is slightly below zero. So, perha=
ps the leakdown on the first three is higher. </div><div class=3D"">Th=
ere was no excess oil until the last session. Oil pressure is about 5=
0 hot at idle and 65 - 75 at speed, depending on RPM.</div><div class=3D"">=
EGT readings remained in the 1200 - 1250 range across three monitored cylin=
ders at top speed</div><div class=3D"">What do i have - failing rings? &nbs=
p;</div><div class=3D"">Any diagnosis or tests you recommend before I start=
pulling the thing apart would be appreciated.</div><div class=3D""><br cla=
ss=3D""></div><div class=3D"">Triumphs racing - I=E2=80=99m sure I=E2=80=99=
m missing a few but this is who I remember.</div><div class=3D"">TR3 - John=
Hasty, Henry Frye, John Styduhar</div><div class=3D"">GT6 - me, Paul King,=
Jason Sukey, Jay De Pol until his diff case broke</div><div class=3D"">Spi=
tfire - Russ Moore, Marty Sukey, Jeff Govert, Kent Bain, others </div>=
<div class=3D"">Tr4 - Mark Wheatley, Allen Goode, I=E2=80=99m missing at le=
ast another one</div><div class=3D""><br class=3D""></div><div class=3D"">S=
cott Janzen</div><div class=3D""><br class=3D""></div><br>_________________=
______________________________<br>fot@autox.team.net<br><br>http://www.fot-=
racing.com<br><br>Donate: http://www.team.net/donate.html<br>Archive: http:=
//autox.team.net/archive http://www.team.net/pipermail/fot<br>Unsubscribe/M=
anage: http://autox.team.net/mailman/options/fot/van.mulders.marcel@telenet=
.be<br></div></div></body></html>
--=_966c6f09-1e66-49db-8115-11a189d3f5fb--
--===============8953605769050514434==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
--===============8953605769050514434==--
|