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I'm currently on 7. which JP says is the slowest ramping curve.
You likely want the fastest one with the least amount of timing, either A or B (B20E 10 static, 34 maximum) The more inlet duration you have, the faster & shorter the curve needs to be. In one of my old race engines with 260°-270°@.050" of inlet cam timing, i'd run a locked distrubutor set to 27° of timing, that means 27° at idle to 7000rpm.
Dyno, get there ASAP & set the timing at peak torque! It doesn't take much detonation to smash a top ring in to twenty pieces which if you keep driving it, will ruin the piston's top ring groove & hurt the bore.
You are right about getting on the dyno. If the mixture is reasonable, get it on a dyno & set the ignition timing, not the idle timing, but the timing at peak torque is essential & optional, check it 1000 rpm either side & at peak horsepower. At peak torque, you set the timing to the minimum amount required that delivers the most peak torque, once you start adding more in, you are only hurting the engine.
A lot of people will tell you just keep advancing the timing until it pings & back it off a bit, but this could still be way more than is needed & in a decent motor, you can run right past pinging & go to full blown, sometimes inaudible detonation & cough out the top rings.
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Three 164's, Two 144's, One 142 & a partridge in a pear tree.
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