jamie v said:
Air makes power not boost (Boost is just a measure of resistance)
You hit the nail on the head there: CFM=AirFLOW=Power
Boost is
Unused Combustion Air :tu:
jamie v said:
(because at 15#s of boost the Novi pushed more air then the SQ). This is the same reason the Gen 2 guys switch out the Eaton blowers for the KB because they push more CFM's at any given # of boost.
I kinda see where you are going with this but I have a different twist on this issue, being a Gen2 guy.
I won't comment on the
SQ vs
Novi. But the Eaton/KB I will.
15 pounds manifold pressure is the same flow unless you change heads, ports, valves, exhaust, etc.
Example: I went with a full long tube exhaust and gained HP and "Lost" boost. Jamie knows why. Increased flow(CFM) "Used Up" some of the
Unused Combustion Air.
However, If you swap out an Eaton and swap in a KB, with no other changes, and size the pullies to 15#(the same as what was removed), the CFM is the same.
The increase in power with the KB is that it makes more boost than the Eaton. So you slow it down to keep the boost the same. This results in less parasitic drag.
Secondly, the KB generates less heat. A lot less. In the Gen2s the computer pulls something like 1 degree of timing for every 10 degrees of manifold heat. If the KB runs 50 degrees cooler. That's 5 degrees timing added. This is a conservative estimate. I have heard bigger Temp/Timing curves. How much HP is 8-10 degrees of timing? You get the picture now. :tu:
Getting back to the centrifugal units I think the same might apply. Maybe the Novi runs cooler with less drag? Was the timing the same with the blower swap or were you able to bump up the timing after?
I'm not doubting your claim, just offering something else to consider.
Fred Decker
;w