<html><body><div style="font-family: Verdana, Arial, Helvetica, sans-serif; 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 crankcase. It means there is some blow by, but maybe the symptoms are not necessarily bad news.</div><div>Marcel</div><div><br></div><hr id="zwchr" data-marker="__DIVIDER__"><div data-marker="__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="__QUOTED_TEXT__">I just had a great weekend at Summit Point, perfect weather, four days and lots of track time, some quick laps and good racing. <div class="">After my last session, I noticed some dripping oil as I put the car in the trailer.</div><div class="">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="">Tonight I ran a compression test and leakdown test. Cold engine results:</div><div class=""><br class=""></div><div class="">1 - 200 and 2%</div><div class="">2- 180 and 6%</div><div class="">3 - 180 and 9%</div><div class="">4 - 195 and 0%</div><div class="">5 - 190 and 0%</div><div class="">6 - 185 and 0%</div><div class=""><br class=""></div><div class="">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 is slightly below zero. So, perhaps the leakdown on the first three is higher. </div><div class="">There was no excess oil until the last session. Oil pressure is about 50 hot at idle and 65 - 75 at speed, depending on RPM.</div><div class="">EGT readings remained in the 1200 - 1250 range across three monitored cylinders at top speed</div><div class="">What do i have - failing rings? </div><div class="">Any diagnosis or tests you recommend before I start pulling the thing apart would be appreciated.</div><div class=""><br class=""></div><div class="">Triumphs racing - I’m sure I’m missing a few but this is who I remember.</div><div class="">TR3 - John Hasty, Henry Frye, John Styduhar</div><div class="">GT6 - me, Paul King, Jason Sukey, Jay De Pol until his diff case broke</div><div class="">Spitfire - Russ Moore, Marty Sukey, Jeff Govert, Kent Bain, others </div><div class="">Tr4 - Mark Wheatley, Allen Goode, I’m missing at least another one</div><div class=""><br class=""></div><div class="">Scott Janzen</div><div class=""><br class=""></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/Manage: http://autox.team.net/mailman/options/fot/van.mulders.marcel@telenet.be<br></div></div></body></html>