<VV> 1963 Turbo Engine Backfiring through the carb.

Frank DuVal corvairduval at cox.net
Sat Nov 9 09:53:08 EST 2013

I agree with Ken. Get the valves quieter first.

Frank DuVal

On 11/9/2013 8:51 AM, kenpepke at juno.com wrote:
> The valve noise on that engine is terrible … if the uTube sound is believable.  That means the valves are not opening to their proper distance, maybe not at all.  Maybe one or more are stuck open a bit.
> At this point I would let the engine run at dead idle for a long time.  If the lifters do not 'pump-up' in an hour or so, then it is time to do a valve rocker adjustment.  If it is still back firing it is time for a compression check.  A slightly stuck open valve will show up in very low or maybe even zero cylinder pressure.
> Ken P
> Wyandotte, MI
> 65 Monza 110hp 4 speed 2 door
> Worry looks around; Sorry looks back, Faith looks up.
> ************************
> On Nov 8, 2013, at 7:16 PM, "Carl Wager" <carl at pcxcomputers.com> wrote:
>> 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

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