Heheh I checked with prototyperacing.com

for elise k20A conversion it's $15K including a low milage engine.

they are nearly done with the K20A (2.2L) and it's making 300hp.

they also plan on having a turbo charged version making 450hp.

that's 300hp in a 1800lb car (or less). 6lb/hp
and 450hp = 4lb/hp

my m coupe is 11.9lb/hp the newer S54 mcoupes are 9.9lb/hp.

i believe the z06 is around 8lb/hp

i'm dumping that crappy 2ZZ-GE in the first year