Another Super Victor?

yellow rose said
Did you test the super sucker against an open spacer the same height? My experience with all those tapered spacers were that an open spacer priced similar results, and if a spacer made power, it was a plenum issue.

Darin Morgan wrote a bit about this on speedtalk.com and he had some interesting thoughts on tapered spacers.
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No. I already had the super sucker that was ran on my 408 so I took it when the 434 was dynoed. We made a few pulls without the spacer and the first pull after installing it made 13 more HP. Without the SS the AFR's were about 1 point different side to side, after the SS they were within a tenth all through the rpm range.