I went and played with it after posting. There was Missing bolt from blower to pipe, taped up gas orifice hole up, and got much better output... Then I realized..... Duh..... Dimmer dial........chances are i won't need 100cfm........ Especially. For smallish kiln.
( note to self don't test stuff when tired and late at night) ( so for most part disregard, in my best Gilda Radner voice......"never mind!"
What temperature do I need killn for gas to self ignite? What temp is red hot? ( yeah I'm trying figure options, before I drop coin for basso, and or other saftey parts)
Don't "invest" in a "dimmer" switch--unless its rated to be used with a load like your blower will produce, you'll burn out a lamp dimmer switch quickly. See how your blower has an intake on the side? Use a flat fridge magnet to cover that, you can adjust how much of the intake is covered to adjust your air output to the burner--simpler and cheaper than a rheostat for the blower. Now take that money you saved, go drop the ~125.00 on a baso valve.