There is a 2ltr version of the qr25de = 267lbs
It has shorter stroke crank around 80mm and is
supposedly due to crankshaft 12lbs lighter
30% shorter engines than the sr20 and 13% lighter
which if an sr20 bare is 100kg the qr25 is 13kg less.
However post 08 QR25de update is full counter crank
so would be a little heavier again 5lbs?
There a Jim Wolfe twin balancer delete removes 8lbs
No power steering pump -16lbs
No catalic converter aftermarket headers -16lbs?
lightweight flywheel and clutch JW 12lbs
UR underdrive crank pulley -3lbs
FWD engine mounting brackets and other brackets -8lbs

around 85-90kg dressed which is nothing

175hp + jim wolfe headers +12hp, balance delete +6-8hp
some s1 cams just under 200hp without much sweat
the stage 2 or 3 cams add another ???hp

Pity QR25DE dont suit the 1200 coupe retro lines ;(
if I had to choose Id save up for an sr20ve