Dude and others:
On our particular combo (nearly 900hp, 467", 8100rpm) our tapered spacer is worth quite a bit. I don't want to talk about how much
, but it also depends on the manifold work..
On milder, 9 sec Pontiacs that I help out, it also helps too.
There have been several magazine articles about our spacers, most gain between 8-12hp on mild combos.
But the dyno won't tell you how it helps accelerate off the gear change, how much quicker/cleaner the car goes on the two-step after the spacer install, or with the better distribution down the track now the motor can be tuned to MAKE more power by having better distribution..
Most "engine masters" contestants and winners use our spacers.
Most people don't know this, but Keith Wilson came up with, and made tapered spacers BY HAND for HVH in the early to mid 80's, before they started marketing their own version with a fancy name---"super sucker". All of a sudden, they claim they are the first and best tapered spacer?? Go figure..
Feel free to call me at Wilson's, I will elaborate on spacer function further.