Adams,
The Flow Kooler pump has an impellar that looks like an egg beater. Their literature claims to improve flow at low speeds, but they are silent about what happens to the pump curve at higher rpm. If there was something to brag about, I think they would, so their silence is a red flag to me. I wrote them several years ago and inquired about a copy of a full flow curve for their pump, they never responded.
I prefer the curved vane impellar of the Edelbrock pump.
cowboy from hell
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