I'm trying to build a super fast 8th scale car.
My understanding is that max voltage is best achieved in either the flux 2650 or 2200kv motors (which i understand are cc motors)

I saw the 1965kv Flux Scream 6 pole motor

So will this be a more efficient/faster motor at 6S or higher?

I don't think the 2650kv motors are rated for 6s (max 4s). Don't know anything about the 1950 flux.

rated, recommended and actual limits are debatable...

The 2650 can be run on 6s, but when it blows, don't be surprised.

Is this for bashing, racing, or drag racing?

6s is always good fun, just putting it back together is a pain.

For Drag racing: I run the 2650 on 6S every week; you're not gonna blow it up blink of an eye race or 1-300 ft; it's the 6 pole that i have the question about; more tq more effic more speed?