Yes, 24* with vacuum advance disconnected. Probably still had the Holley on the brain when I typed that! It runs great with 24* initial, 42* total. Bad combination maybe? I'm just trying to click thru different things in my head, trying to determine why this car isn't running like it's supposed to. I've currently got Accel resistance plug wires and (mostly new but still carbon fouled) Champion RJ12YC plugs in there. In other words, the timing mark/line is by no means "standing still" under the light. However, the timing mark does tend to flit 5 degrees either way.either at idle or at increased RPMs. It's running *better*, but methinks there are more issues afoot that I will have to get after over the winter, not the least of which is the aforementioned carb.ĭumb noob question here.as I mentioned, the timing is pretty well where it's supposed to be. I have it dialed in to about 10-12 BTDC now. I finally had a chance to try the new one out tonight. Hey guys.thank you so much for all of your help and advice! I ended up having to return the first light that I bought, as it had a short in it. Like I said, if you're not familiar or comfortable with doing this, then stay conservative on the timing. When using Fugly's white paper to find timing ( ), I ended up with 24 degrees at idle, 42 degrees all in by 3000 rpms, and 10 degrees in the vacuum advance.Īt altitude, the engines like a bit more initial timing, but you have to make sure you are limiting the amount of timing added by the mechanical advance (for example, my Mallory came stock/pre-set to 24 degrees mechanical advance I had to adjust it down to 18 once I found my numbers). Slightly lumpy cam (unknown specs), unknown compression ratio, 516 heads, Holley Street Dominator single plane intake, 1" phenolic adapter, Holley Street Avenger 770cfm (which the motor loves!), Mallory Unilite with vacuum secondary, Mallory Promaster coil, and Hooker headers (probably 1 5/8"). I'm at ~5640 feet and have a 383 in my '68. Since you're new to doing this, I'd say start conservative as Steve suggested with 12 BTDC at idle. I prefer using a vacuum gauge to find out what timing the motor wants.
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