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The ghost cam idle is possible because the 5.0's are quad camshaft and the intake and exhaust camshafts are independently variable of each other. This means that you can literally tune overlap into the cams. You can do the same thing with the old 4v modulars (those don't have any sort of VCT) by getting adj cam gears and mechanically dialing in some overlap. While 3v's do have VCT, the intake and exhaust lobes are on the same camshaft, so it's physically impossible to adjust valve overlap without swapping camshafts. So to sum it up, 4.6's can't do it because they're SOHC.
I kinda summarized this from another forum because it was a good explanation.
The ghost cam idle is possible because the 5.0's are quad camshaft and the intake and exhaust camshafts are independently variable of each other. This means that you can literally tune overlap into the cams. You can do the same thing with the old 4v modulars (those don't have any sort of VCT) by getting adj cam gears and mechanically dialing in some overlap. While 3v's do have VCT, the intake and exhaust lobes are on the same camshaft, so it's physically impossible to adjust valve overlap without swapping camshafts. So to sum it up, 4.6's can't do it because they're SOHC.
I kinda summarized this from another forum because it was a good explanation.
I sort of figured it wouldn't work for that reason but you explained it better than I could. Thanks. Looks like I need to drop some of those cubic dollars to get that lobe I want.