Quote:
Originally Posted by dataway
A "lean miss" can sound like that sometimes. Once had a holley 450 cfm carb on my GTO ( when I was 17) ... at about 4000 rpm it would start crackling. Luckily I corrected the situation before I melted a piston.
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How did you correct it? I had a dyno test done and I was a little lean at WOT, so I increased the jetting. I redid the dyno thing and no change. Strange. Timing is 12 initial 32 total.