<VV> 65 Turbo Timing Problem

[Duane, Jim]

Hi Mike, any drive over 100 miles is a good drive in a Corvair ;>)  

	A couple points (pardon the pun).  
- 1  The pressure retard, even when inoperative, will not effect timing
at idle.  22-24 degrees BTDC is where you want to be. I do have the Dale
and love it.  Since that factory setting is normally made with no
advance applied, I set my timing with the vacuum plugged/removed.  Now,
anytime the engine is at part or low load, the advance can "do it's
thing" and give better fuel economy and throttle performance.  The test
comes when you add the vacuum line.  With the Dale unit you should
experience a jump of 8 degrees or so from no vacuum.  Prahaps your
changes are due to the electronic ignition.  The Pertronix installation
will require re-timing.  You might have to pull and advance the
distributor, or move the wires around one position.  

- 2  Watch for the slipping harmonic balancer type problem.  There are
timing marks on the 2 halves, but I can't remember if the marks are on
the front or back.  Wouldn't make any sense if the marks were on the
back, eh?  

Good luck.

Jim Duane
'66 180 Corsa cvt.
Colonial Corvairs
CORSA
       

-----Original Message-----
From: virtualvairs-admin@corvair.org
[mailto:virtualvairs-admin@corvair.org] On Behalf Of michael cassera
Sent: Tuesday, April 20, 2004 2:07 AM
To: virtualvairs@corvair.org
Subject: <VV> 65 Turbo Timing Problem

I'm having an interesting problem with my 65 Corsa 180.

Recently I mentioned having misfiring problems after a long (140m) drive
weekend to the Corvair Gathering in Mesqite.  The problem turned out to
be a malfuntioning spark plug.  My guess is that I didn't tighten the
plug enough causing it to overheat during the drive.  The head
temperature was reading 500 degrees over the course of the trip.

During the process of fixing the problem, I replaced several ignition
parts that I wanted to replace anyway.  They include, wires, distributer
cap, flamethrower coil, ignitor electronic ignition and of course AC 44f
plugs.  

When I replaced the points with the ignitor ignition, I checked the
timing to make sure everything was working well.  For some reason, the
timing was set to 16 degrees.  I had checked the timing a few months ago
when the points were still installed and it read 24 degrees.  I assumed
that changing from point to the ignitor had changed the timing so I
didn't think much of it.  I went to adjust the timing.  The problem is
that even when I turned the distributor all the way to the stop counter
clockwise the best I can get on the timing is about 20 degrees.  

Is there a possibility that the pressure retard has failed?  How would
you test that?  I was also considering getting the Advance/Retard unit
by Dale Manufacturing.  It's not tragic that the timing is retarded a
little bit to help with spark detonation when I boost, but I would
rather have things to spec if possible.

Any ideas?


Thanks,

Michael
65 Corsa Turbo.  (Still a newbe)   
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