<VV> DISTRIB FAILURE

[FrankCB]

John,
     Well, it certainly can make a difference in the performance of the engine.  When I bought my 180 years ago, I found out after driving it home (about 30 miles) that it had a VACUUM advance from a NA Corvair on the distributor.  The only thing saving the engine from too much advance was that the vacuum "pot" had a leak so the car had NO advance and NO retard.  It was running at a FIXED 24 degrees under all conditions.  Later I changed it for a functioning VACUUM advance and used an electronic knock sensor to retard the timing. 
     IMHO, the stock turbo Corvairs suffered from having NO vacuum advance.  I think that's why so many MORE 140s were sold than 180s!!
     So there are various ways to tailor ignition timing for our Corvair engines.
Frank "stock is a good beginning" Burkhard 

In a message dated 03/09/10 10:25:45 Eastern Standard Time, jvhroberts writes:
Frank, at the end of the day, it's a distinction without a difference. As long as he uses the right one for the right engine, that's all that matters. Although, I HAVE used a vacuum advance on a turbo Corvair (connected to the vacuum port on the compressor inlet) with good results. 



John Roberts




-----Original Message-----
From: FrankCB <frankcb at aol.com>
To: Doug Mackintosh <dougmackintosh at yahoo.com>; N2VZD <N2VZD at aol.com>
Cc: Virtual Vairs <virtualvairs at corvair.org>
Sent: Tue, Mar 9, 2010 10:18 am
Subject: Re: <VV> DISTRIB FAILURE


If you have a "vacuum/pressure pot" then it's not a stock Corvair part.  The 
stock Corvair units were EITHER vacuum OR pressure, but not both.  The PRESSURE 
pots were used on the turbo Corvairs while all others used the VACUUM pots.
     Frank Burkhard

In a message dated 03/09/10 02:25:05 Eastern Standard Time, dougmackintosh at yahoo.com 
writes:
I'm going to salvage the vacuum/pressure pot