REFLECTOR: Crankcase venting

[aminetech at bluefrog.com]

I've also had leaks and suspected excessive crankcase pressure.  Part of the cause was my EI ran too advanced because 1) a bad ground caused it to advance more than it should and 2) the MAP sensor advance was too great for my 10.5/1 compression Franklin.  Have you tried running on just the mag and comparing to just the EI?  If the EI runs stronger, it may be too advanced.

John

--- scott at tnstaafl.net wrote:

From: Scott Derrick <scott at tnstaafl.net>
To: reflector <reflector at tvbf.org>
Subject: REFLECTOR: Crankcase venting
Date: Wed, 27 Apr 2011 08:40:05 -0600

I'm experiencing oil seeps that I think I the result of excessive 
crankcase pressure.

Continentals are notorious for blowby, even when new and require a very 
open vent. I installed a Andair air/oil separator which does work really 
well in captureing the oil but I fear it is causing the excessive back 
pressure.  Anybody else have experience in this regard?

I'm also considering modifying my exhaust header similar to

http://www.allstarperformance.com/downloads/instruction_sheets//ALL34145_Crankcase_Evacuation_System.pdf

to create a crankcase evacuation system.  Rutan recommended a similar 
modification to the exhast system for longezs.

Scott

-- 
We must learn to live together as brothers or perish together as fools.
Martin Luther King Jr.

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