<VV> What have you done to stop your engine from pinging?

[Mikeamauro at aol.com]

"...Cutting out the head gasket step - without step-cutting the  piston.  
Agressive deflashing of the heads with a 1/8" drill. Approximately  10.5:1 
compression 140 engine with no pinging..."
 
Yes, forgot to mention: de-flashing cooling fins is mandatory. Also, I  
believe (and perhaps other experts will chime in) 110s are the most likely to  
knock and ping, while 140s are the most forgiving. Both my tight quench 
engines  are 110s; and, following reducing the quench distance to .032, both had 
 combustion chambers set to 9.5:1 (One by cutting opposite quench side top 
of  forged pistons, the other by removing material from the heads away from 
the  quench area; both were final Cced, and both methods seem to work 
equally well.).  Chose not to get to aggressive with compression ratio as: 1) both 
have AC; 2)  Are Powerglide-equipped; and are driven in hot, Florida. Also, 
the 67 coupe has  a 327 diff, partially compensated for with a converter 
modified for a slightly  higher stall speed. This vehicle is also driven much 
leaner than  stock, consistently just a "tick either side of 14.7 (as 
verified,  real-time, using wide band O2 meters). 
 
Regards,
Mike Mauro
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