Join Date: Jan 2004
Location: Austin, TX y'all
Centrifugal blowers are only going to make reasonable power from 4,000 on, and good power from 6,000 on. Your low end tq will see little to no benefit. Given the compression ratio of the motor, you'll be looking at a 6psi kit, which is good for a whopping 2psi at 4,000 rpm.
You'll add lots of heat to the motor, will likely need extra cooling capacity in form of a better radiator and a second oil cooler for long term reliability, all while deviating from the subtle throttle response that Lotus designed into the car, which plays a role in handling at the limit.
Nitrous properly managed would be fine, but unusable where the Elise is in its element, backcountry roads and the track.
Just my opinion of course. I'd be more interested in a crate motor.