Everything I listed will affect the static compression ratio of the motor. You NEED to know all of that, plus your cam specs, to get a good sense of what the spark tables will likely look like. More cylinder filling means less timing needed because a more dense mixture burns more quickly. Higher compression will also mean you need to run less timing or higher octane, or both.
My cam with the 1.6 roller rockers will be .525 & .525
Duration @.006 cam lift. 272. 281
@ .050 cam lift. 219. 228
Lobe centerline 109. 115
Lobe separation. 112
As far as every thing else I will know more tomorrow because I’m going to see my builder. I’m sorry it takes so long to get back to you I’ve been working 12 hrs days and there’s not much time to do anything else.
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