rotor=awesome
over the years ive been helping my mate with his 12a in a series 1? rx7
started off just a rebuild standard, i think it made like 100hp at wheels. (carby still)
next came efi, some sort of hybrid 13B injector setup, staged injectors. all run off a megasquirt. road tuned by us in the backstreets.
then about 1yr ago, we put a little 13B hairdryer one the side, still standard 12a specs. and this thing absolutly hauls ass. hes got a 13.2 i think at the drags, thats just king springs and semi slick tyres. we arent sure how long the apex seals are gonna last, but hopefully a bit longer. thats only on 7psi as well.
ive had a drive of it, and the response is absolutely insane, and forget about torque issues, plenty of that. the turbo at the moment is actually a tad small, starts losing boost at 7k or so. getting a bigger turbo soon, to keep the air coming at 9k+
they are fidly engines though, gota know what your doing, im not really that up on them, i just help out where i can. my mate has a really nice setup, has all the decent parts to make it reliable. its his daily driver too.
in short, if i had the money/time/room id have a 12a turbo (13b is illegal) in my ke70. even standard 12A efi was awesome, without turbo. the standard carby is a bit of junk from what ive been told.
oh and if your p plate, forget about any of this being legal. unfortunately your stuck with k motors for a few years.