[Fot] exhaust PCV

[Joe Boruch]

Pulling a vacuum on the crankcase can be very effective at getting rings to seal, but for the vacuum to be helpful, all engine openings need to be well sealed.  No breathers, dipstick o-ringed or sealed, oil filler sealed tight, etc.  I have threaded the dipstick hole and keep it sealed with a bolt.  Checking the oil takes a few minutes longer, since the bolt needs to be removed to insert the dipstick. Pulling a significant vacuum is one of the advantages of a dry sump oil system.  The dry sump pump can pull so much vacuum that a vacuum break is needed to limit the vacuum.  Joe(B)

---------- Original Message ----------
From: Joe Alexander <joealexandervintage at gmail.com>
To: Joe Boruch <jaboruch at netzero.net>
Cc: britracer89 at yahoo.com, fot at autox.team.net
Subject: Re: [Fot] exhaust PCV
Date: Fri, 7 Dec 2018 10:04:41 -0600

This sounds probable. Perhaps more likely on some engines than others.
 I tried to imagine the conditions that would create this issue with a wet sleeve engine. Didn’t come with anything. It has been effective for us. It is reported to aid in Ring Sealing, too.

Joe Alexander4505 Donald DrCedar Falls, IA 50613The-vintage-racer.comGasketinnovations.comCell:  319.464.4711 
On Dec 7, 2018, at 8:23 AM, Joe Boruch via Fot <fot at autox.team.net> wrote:

I think that if it sucks oil into the hot exhaust it may ignite in the exhaust, smoke extensively, and if the oil makes it thru the exhaust, oil the track.  Most rules are written in blood, so I suspect that there were incidents, so it was banned.  The rule has existed ever since I have been in the SCCA, so I don't have any specific history.  Joe(B) 

---------- Original Message ----------
From: Brian Dennis <britracer89 at yahoo.com>
To: william.tobin31 at verizon.net, Joe Boruch <jaboruch at netzero.net>
Cc: fot at autox.team.net
Subject: Re: [Fot] exhaust PCV
Date: Fri, 7 Dec 2018 13:51:53 +0000 (UTC)

 
 Anyone know why it would not be allowed? On Friday, December 7, 2018, 7:14:24 AM EST, Joe Boruch via Fot <fot at autox.team.net> wrote:  Be aware that the some sanctioning bodies do not allow the use of the exhaust to be connected to the crankcase for ventilation purposes.  The SCCA does not allow it.  Joe(B)

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