11 Stroker 390 Dyno Test
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6 We like the Professional Products harmonic balancer for outstanding quality and timing marks you can see in just about any light. Always check harmonic balancer indexing because all balancers aren't properly indexed. We've seen harmonic balancers as far off as 11-degrees, which can be destructive if you crank in too much timing. When you fire your engine, go for no more than 36-38 degrees total timing at 3,000 rpm with vacuum advance connected. View Related Article
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