<VV> Turbo/Pinging

[FrankCB at aol.com]

Scott,
    Since it only pings on boost, I'd check the retard  function of the 
retard chamber ("pot") on the side of the distributor.   With the engine running, 
disconnect the tubing from the intake manifold to the  "pot" (plug the manifold 
connection) and apply about 5 to 10 psig of air  pressure to the retard pot 
while lmeasuring the timing of the spark with a  timing light.  You should see 
a timing retard when the air pressure is  applied.  If this doesn't happen 
that means your retard chamber is faulty  and should be replaced.
    Frank "sometimes retarded" Burkhard
 
 
In a message dated 7/5/2006 7:22:28 PM Eastern Standard Time,  
scandish at sbcglobal.net writes:

Probably  an elementary ? for you old timers.
Got the rebuilt YH in & the  Corsa runs great.Fires up in a coupla cranks, 
few more when hot. No complaints  in normal aspiration.However, when the turbo 
kicks in above 35K it pings like  a S.O.B. Running 91 octane. New plugs, new 
fuel filter.Retard the timing??  What am I missing? TIA.

Scott
'65  Corsa
UNSAYF