If anyone is interested, we did some test over the weekend with a 1" HVH spacer that was made for the RPM intake. We made back to back runs compareing it to our 1" open space that we always run. There wasnt much difference in the two. Only about .03 seconds and .5mph. We didnt get a chance to change jetting yet. I dont think that there will be that much gained by the jetting. I do feel that the 2" HVH spacer would pick up more or by adding a 1/2 open spacer underneath the 1" HVH (its pretty closed off, not as open as I thought it would be, only about a 1" gap). I would like to test the 1/2 space idea this year but dont know if you will be able to.
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