Overdriven pulley how much is too much?

Kenflo said

Good info indeed! Maybe I need to consider with this particular combo using a standard water pump instead of a high volume like the factory. 6 blade? The water pump I intend on using is the flow kooler which seems to have a anti cavitation type impeller.

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Realistically I think you’ll be fine. I don’t know if Flow Kooler publishes any info on their maximum operating rpm, that might be worth checking into. But it looks like they list it for the AC application and the factory had a higher driven ratio so it should be ok.

Same thing for the fan actually, check the maximum rpm if there’s one listed for the fan or the clutch as that’s something you don’t want to exceed.