<VV> 1963 Turbo Engine Backfiring through the carb

[kevin nash]

> Message: 1
> Date: Fri, 8 Nov 2013 18:16:27 -0600
> From: "Carl Wager" <carl at pcxcomputers.com>
> Subject: <VV> 1963 Turbo Engine Backfiring through the carb.
> To: <virtualvairs at corvair.org>
> Message-ID: <000001cedce0$f5380f80$dfa82e80$@com>
> Content-Type: text/plain;	charset="us-ascii"
> 
> I have a 63 turbo engine with about 12K on it since a complete rebuild.  It
> was stored 2 years ago.  It has been spun 4 times to keep it loose.  I just
> installed it in a 64 Spyder that I am rebuilding.  I replaced all ignition
> including wires.  I had the carb rebuilt by Wolf.  The fuel is fresh.  I put
> a fuel regulator in the line.  I am running at 3 lbs.  I put a new filter
> and return line from Clarks. The engine cranks and runs well with no
> smoking.  When you rev the engine up, it backfires through the carb.  I have
> posted a video on youtube (http://youtu.be/NQuk3JCX_S8 ) so you may listen
> and see the engine running.  Any ideas on things to try would be greatly
> appreciated.  The compression on all cylinders is good.  It ranges from 128
> to 139. I have ranged the timing from 16 to 24 degrees with no change.  With
> a timing light on it, it does not advance when it accelerates so that part
> is working correctly.  Should it retard?  I did try another carb, but the
> results were the same.  Again, I up for any ideas.   Thanks    Carl  1965
> Corsa   1966 Monza   1964  Spyder  1988 Fiero  

Carl- As others have said, let the engine run long enough to get the lifters to settle down- my experience is that
it takes a good half an hour, sometimes longer, for the lifters to settle down. I strongly suspect you wont get that
intake backfire to go away until you put the air cleaner on!! (my 63 turbo will do the same thing without the air cleaner-
put it on, problem solved!!)
Kevin Nash