I’m 99% certain I had used a Fluidyne slimline fan rated around 3,000 cfm. That car was dyno’ed at 507 whp at 17 lbs of boost using a T3/T67 ball bearing turbo with a massive intercooler. I completely get where you’re coming from with your switch to electric. However, I personally think that the parasitic drag caused by the OEM fan is marginal. Though, if the OEM fan on my truck starts making any noise, I’ll likely go your route simply for the sake of ease of installation as the price is negligible between the two.