some engine weights

all numbers quoted here are fully dressed unless commented otherwise.

552hp lfa's 1lr-gue v10 : ~380 lbs (0.7 lbs/hp) [bare or dressed?]
255hp rx7's 13B-rew rotary: ~400lbs (1.6 lbs/hp) [unverified]
505hp c6z06's ls7 v8: ~460 lbs (0.9 lbs/hp)
605hp carrera gt's v10: ~470lbs (0.8 lbs/hp)
405hp c5z06's ls6 v8: ~500lbs (1.23 lbs/hp)
638hp c6zr1's ls9 v8: ~530 lbs (0.8 lbs/hp)
600hp viper v10: ~550lbs (0.9 lbs/hp)
320hp supra 2jz-gte i6: ~590lbs (1.8lbs/hp)
480hp skyline's vr38dett v6: ~610lbs (1.3 lbs/hp)

interesting.