Well the recent discussion in the L series 1000 thread about lightweight motors really sparked my interest and I started reading up on some of the later model nissan motors that are pressure die cast as they are the lightest for capacity of the nissan motors, and the heads flow awesome. I really like the qr20de as suggested by D and think it would make a cool little motor for a 1200 and if I had have found one on trademe this afternoon for the right price I fear i would have brought it!
However I got thinking about a super lightweight Race coupe and started planning out a build (in my head of course :))
What i had in mind was a small capacity motor, somewhere around 1300cc with a blower or a turbo (or both if your a mad man!), all fibreglass panels lexan windows, H165 diff etc etc etc.
Anyway my (fantasy) research lead me to the cr series motors which are they latest small capacity pressure die cast motors in the nissan march's, cubes etc, since the cg13de only weighs in at somewhere around 60kg and is sand cast (read:heavy) a cr engine would be a seriously light motor.

ANYWAY the point of my ramblings is the cr series comes in 1L 1.2L and 1.4L so I was thinking for the guys in IPRA who wanted to stay in the under 2L class the CR12de would be awesome. They are 90hp standard and being a nissan motor they are tough as nails so would take to a healthy dose of boost so I reckon you could have a motor with an easy 150kw at the wheels on a unopened motor that weighs probably less than the A12 that came out of it!
Or if class limits aren't a problem get the extra capacity for pretty much no weight gain :)
they are fwd motors so work would need to be done with intake exhaust and gearbox, but if you can build a race coupe you probably have the skills to sort that one out too!

Anyway what do you guys reckon, you guys got any other cool ideas swimming round in your heads, lets hear them.
I expect D will have something to say, he's the lightweight engine research king!

Nick